1
|
Mann P, Fairclough SM, Bourke S, Burkitt Gray M, Urbano L, Morgan DJ, Dailey LA, Thanou M, Long NJ, Green MA. Interface Engineering of Water-Dispersible Near-Infrared-Emitting CuInZnS/ZnSe/ZnS Quantum Dots. CRYSTAL GROWTH & DESIGN 2024; 24:6275-6283. [PMID: 39131444 PMCID: PMC11311135 DOI: 10.1021/acs.cgd.4c00528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 07/11/2024] [Accepted: 07/12/2024] [Indexed: 08/13/2024]
Abstract
We report the synthesis of near-infrared (IR)-emitting core/shell/shell quantum dots of CuInZnS/ZnSe/ZnS and their phase transfer to water. The intermediate ZnSe shell was added to inhibit the migration of ions from the standard ZnS shell into the emitting core, which often leads to a blue shift in the emission profile. By engineering the interface between the core and terminal shell layer, the optical properties can be controlled, and emission was maintained in the near-IR region, making the materials attractive for biological applications. In addition, the hydrodynamic diameter of the particle was controlled using amphiphilic polymers.
Collapse
Affiliation(s)
- Patrick Mann
- Department
of Physics, King’s College London, The Strand, London WC2R 2LS, U.K.
| | - Simon M. Fairclough
- Department
of Physics, King’s College London, The Strand, London WC2R 2LS, U.K.
| | - Struan Bourke
- Department
of Physics, King’s College London, The Strand, London WC2R 2LS, U.K.
| | - Mary Burkitt Gray
- Department
of Physics, King’s College London, The Strand, London WC2R 2LS, U.K.
| | - Laura Urbano
- Centre
for Topical Drug Delivery and Toxicology, School of Life and Medical
Sciences, University of Hertfordshire, Hatfield AL10 9AB, U.K.
| | - David J. Morgan
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K.
| | - Lea Ann Dailey
- Department
of Pharmaceutical Sciences, University of
Vienna, Josef-Holaubek-Platz 2, 1090 Vienna, Austria
| | - Maya Thanou
- Institute
of Pharmaceutical Science, King’s
College London, 150 Stamford
Street, London SE1 9NH, U.K.
| | - Nicholas J. Long
- Department
of Chemistry, Imperial College London, Molecular
Sciences Research Hub, White City Campus, London W12 0BZ, U.K.
| | - Mark A. Green
- Department
of Physics, King’s College London, The Strand, London WC2R 2LS, U.K.
| |
Collapse
|
2
|
Jin L, Selopal GS, Tong X, Perepichka DF, Wang ZM, Rosei F. Heavy-Metal-Free Colloidal Quantum Dots: Progress and Opportunities in Solar Technologies. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2402912. [PMID: 38923167 DOI: 10.1002/adma.202402912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 06/13/2024] [Indexed: 06/28/2024]
Abstract
Colloidal quantum dots (QDs) hold great promise as building blocks in solar technologies owing to their remarkable photostability and adjustable properties through the rationale involving size, atomic composition of core and shell, shapes, and surface states. However, most high-performing QDs in solar conversion contain hazardous metal elements, including Cd and Pb, posing significant environmental risks. Here, a comprehensive review of heavy-metal-free colloidal QDs for solar technologies, including photovoltaic (PV) devices, solar-to-chemical fuel conversion, and luminescent solar concentrators (LSCs), is presented. Emerging synthetic strategies to optimize the optical properties by tuning the energy band structure and manipulating charge dynamics within the QDs and at the QDs/charge acceptors interfaces, are analyzed. A comparative analysis of different synthetic methods is provided, structure-property relationships in these materials are discussed, and they are correlated with the performance of solar devices. This work is concluded with an outlook on challenges and opportunities for future work, including machine learning-based design, sustainable synthesis, and new surface/interface engineering.
Collapse
Affiliation(s)
- Lei Jin
- Centre for Energy, Materials and Telecommunications, National Institute of Scientific Research, 1650 Boul. Lionel-Boulet, Varennes, QC, J3X1P7, Canada
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, H3A 0B8, Canada
| | - Gurpreet Singh Selopal
- Department of Engineering, Faculty of Agriculture, Dalhousie University, 39 Cox Rd, Banting Building, Truro, NS, B2N 5E3, Canada
| | - Xin Tong
- Shimmer Center, Tianfu Jiangxi Laboratory, Chengdu, 641419, P. R. China
| | - Dmytro F Perepichka
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, H3A 0B8, Canada
| | - Zhiming M Wang
- Shimmer Center, Tianfu Jiangxi Laboratory, Chengdu, 641419, P. R. China
| | - Federico Rosei
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgeri 1, Trieste, 34127, Italy
| |
Collapse
|
3
|
Liu Z, Hao C, Liu Y, Wu R, Zhang J, Chen Z, Wang F, Guan L, Li X, Tang A, Chen O. Short-Wave Infrared Light-Emitting Diodes Using Colloidal CuInS 2 Quantum Dots with ZnI 2 Dual-Passivation. ACS NANO 2024. [PMID: 39058309 DOI: 10.1021/acsnano.4c06559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
Short-wave infrared (SWIR) light-emitting diodes (LEDs) have emerged as promising technologies for diverse applications such as optical communication, biomedical imaging, surveillance, and machine vision. Colloidal quantum dots (QDs) are particularly attractive for SWIR LEDs due to their solution processability, compatibility with flexible substrates, and tunable absorption and luminescence. However, the presence of toxic elements or precious metals in most SWIR-emitting QDs poses health, environmental, and cost challenges. In this context, CuInS2 (CIS) QDs are known for low toxicity, cost-effective fabrication, and SWIR-light emitting capability. However, CIS QDs have not yet been directly utilized to fabricate SWIR LEDs to date, which is due to low particle stability, inefficient charge carrier recombination, and significantly blue-shifted luminescence after integrating into LED devices. To address challenges, we propose a dual-passivation strategy using ZnI2 as a chemical additive to enhance both the optical property of plain CIS QDs and charge carrier recombination upon LED device implementation. The resulting CIS-QD-based LEDs exhibit a stable SWIR electroluminescence (EL) peak (over 1000 nm) with a high EL radiance and a record external quantum efficiency in the SWIR region. Our study represents a significant step forward in SWIR-QLED technology, offering a pathway for the development of high-performance, low-cost, and nontoxic SWIR light sources.
Collapse
Affiliation(s)
- Zhenyang Liu
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Chaoqi Hao
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
| | - Yejing Liu
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Rongzhen Wu
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Jianen Zhang
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
| | - Zhuo Chen
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
| | - Fenghe Wang
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
| | - Li Guan
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
| | - Xu Li
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China
| | - Aiwei Tang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing JiaoTong University, Beijing 100044, People's Republic of China
| | - Ou Chen
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| |
Collapse
|
4
|
Hou D, Lv P, Niu W, Guan Z, Wang L, Zhao J, Li X, Ye H, Tang A. Controllable Synthesis of Cadmium-Free Blue-Emitting Cu-Ga-Zn-S-Based Nanocrystals for Solution-Processed Quantum-Dot Light-Emitting Diodes. J Phys Chem Lett 2024; 15:7516-7523. [PMID: 39023013 DOI: 10.1021/acs.jpclett.4c01527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
The utility of semiconductor nanocrystals (NCs) in light-emitting diodes (LED) has shown great potential in the field of display, whereas the challenge remains in developing efficient and stable cadmium-free blue-emitting LED devices due to the poor photophysical properties of blue-emitting NCs. Herein, we develop a controllable synthesis of Cu-Ga-Zn-S (CGZS) semiconductor NCs that show blue light emission with a relative photoluminescence quantum yield exceeding 90%. Furthermore, we have successfully fabricated a solution-processed quantum-dot LED (QLED) using CGZS NCs, achieving a notable maximum external quantum efficiency (EQE) of 1.00% at a luminance of 100 cd/m2. Our work lays a foundational framework for advancing cadmium-free blue-emitting QLEDs and facilitates the development of quantum dot electroluminescent panchromatic displays.
Collapse
Affiliation(s)
- Danxing Hou
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Peiwen Lv
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Wentao Niu
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Zhongyuan Guan
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Lijin Wang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Jinxing Zhao
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
| | - Xu Li
- Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Haihang Ye
- Center for Intelligent Medical Equipment and Devices, Institute for Innovative Medical Devices, Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu 215123, China
- Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Aiwei Tang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
| |
Collapse
|
5
|
Vighnesh K, Sergeev AA, Hassan MS, Portniagin AS, Sokolova AV, Zhu D, Sergeeva KA, Kershaw SV, Wong KS, Rogach AL. Red-Emitting CsPbI 3/ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2400745. [PMID: 38804826 DOI: 10.1002/smll.202400745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/19/2024] [Indexed: 05/29/2024]
Abstract
Producing heterostructures of cesium lead halide perovskites and metal-chalcogenides in the form of colloidal nanocrystals can improve their optical features and stability, and also govern the recombination of charge carriers. Herein, the synthesis of red-emitting CsPbI3/ZnSe nanoheterostructures is reported via an in situ hot injection method, which provides the crystallization conditions for both components, subsequently leading to heteroepitaxial growth. Steady-state absorption and photoluminescence studies alongside X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy analysis evidence on a type-I band alignment for CsPbI3/ZnSe nanoheterostructures, which exhibit photoluminescence quantum yield of 96% due to the effective passivation of surface defects, and an enhancement in carrier lifetime. Furthermore, the heterostructure growth of ZnSe domains leads to significant improvement in the stability of the CsPbI3 nanocrystals under ambient conditions and against thermal and UV irradiation stress.
Collapse
Affiliation(s)
- Kunnathodi Vighnesh
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Aleksandr A Sergeev
- Department of Physics, Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Md Samim Hassan
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Arsenii S Portniagin
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Anastasiia V Sokolova
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Ding Zhu
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Kseniia A Sergeeva
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Stephen V Kershaw
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Kam Sing Wong
- Department of Physics, Hong Kong University of Science and Technology, Kowloon, Hong Kong SAR, 999077, P. R. China
| | - Andrey L Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, P. R. China
| |
Collapse
|
6
|
Liu Z, Hao C, Sun Y, Wang J, Dube L, Chen M, Dang W, Hu J, Li X, Chen O. Rigid CuInS 2/ZnS Core/Shell Quantum Dots for High Performance Infrared Light-Emitting Diodes. NANO LETTERS 2024; 24:5342-5350. [PMID: 38630899 DOI: 10.1021/acs.nanolett.4c01249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
CuInS2 (CIS) quantum dots (QDs) represent an important class of colloidal materials with broad application potential, owing to their low toxicity and unique optical properties. Although coating with a ZnS shell has been identified as a crucial method to enhance optical performance, the occurrence of cation exchange has historically resulted in the unintended formation of Cu-In-Zn-S alloyed QDs, causing detrimental blueshifts in both absorption and photoluminescence (PL) spectral profiles. In this study, we present a facile one-pot synthetic strategy aimed at impeding the cation exchange process and promoting ZnS shell growth on CIS core QDs. The suppression of both electron-phonon interaction and Auger recombination by the rigid ZnS shell results in CIS/ZnS core/shell QDs that exhibit a wide near-infrared (NIR) emission coverage and a remarkable PL quantum yield of 92.1%. This effect boosts the fabrication of high-performance, QD-based NIR light-emitting diodes with the best stability of such materials so far.
Collapse
Affiliation(s)
- Zhenyang Liu
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Chaoqi Hao
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Yingying Sun
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Junyu Wang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Lacie Dube
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Mingjun Chen
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Wei Dang
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Jinxiao Hu
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Xu Li
- Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China
| | - Ou Chen
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| |
Collapse
|
7
|
Jeong S, Ko M, Nam S, Oh JH, Park SM, Do YR, Song JK. Enhancement mechanism of quantum yield in core/shell/shell quantum dots of ZnS-AgIn 5S 8/ZnIn 2S 4/ZnS. NANOSCALE ADVANCES 2024; 6:925-933. [PMID: 38298589 PMCID: PMC10825935 DOI: 10.1039/d3na01052j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 12/27/2023] [Indexed: 02/02/2024]
Abstract
To achieve a high quantum yield (QY) of nanomaterials suitable for optical applications, we improved the optical properties of AgIn5S8 (AIS) quantum dots (QDs) by employing an alloyed-core/inner-shell/outer-shell (ZAIS/ZIS/ZnS) structure. We also investigated the mechanism of optical transitions to clarify the improvement of QYs. In AIS, the low-energy absorption near the band edge region is attributed to the weakly allowed band gap transition, which gains oscillator strength through state intermixing and electron-phonon coupling. The main photoluminescence is also ascribed to the weakly allowed band gap transition with characteristics of self-trapped excitonic emission. With alloying/shelling processes, the weakly allowed transition is enhanced by the evolution of the electronic structures in the alloyed core, which improves the band gap emission. In shelled structures, the nonradiative process is reduced by the reconstructed lattice and passivated surface, ultimately leading to a high QY of 85% in ZAIS/ZIS/ZnS. These findings provide new insights into the optical transitions of AIS because they challenge previous conclusions. In addition, our work elucidates the mechanism behind the enhancement of QY accomplished through alloying/shelling processes, providing strategies to optimize nontoxic QDs for various applications using a green chemistry approach.
Collapse
Affiliation(s)
- Seonghyun Jeong
- Department of Chemistry, Kyung Hee University Seoul 02447 Korea
| | - Minji Ko
- Department of Chemistry, Kookmin University Seoul 02707 Korea
| | - Sangwon Nam
- Department of Chemistry, Kyung Hee University Seoul 02447 Korea
| | - Jun Hwan Oh
- Department of Chemistry, Kookmin University Seoul 02707 Korea
| | - Seung Min Park
- Department of Chemistry, Kyung Hee University Seoul 02447 Korea
| | - Young Rag Do
- Department of Chemistry, Kookmin University Seoul 02707 Korea
| | - Jae Kyu Song
- Department of Chemistry, Kyung Hee University Seoul 02447 Korea
| |
Collapse
|
8
|
Chen B, Zheng W, Chun F, Xu X, Zhao Q, Wang F. Synthesis and hybridization of CuInS 2 nanocrystals for emerging applications. Chem Soc Rev 2023; 52:8374-8409. [PMID: 37947021 DOI: 10.1039/d3cs00611e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Copper indium sulfide (CuInS2) is a ternary A(I)B(III)X(VI)2-type semiconductor featuring a direct bandgap with a high absorption coefficient. In attempts to explore their practical applications, nanoscale CuInS2 has been synthesized with crystal sizes down to the quantum confinement regime. The merits of CuInS2 nanocrystals (NCs) include wide emission tunability, a large Stokes shift, long decay time, and eco-friendliness, making them promising candidates in photoelectronics and photovoltaics. Over the past two decades, advances in wet-chemistry synthesis have achieved rational control over cation-anion reactivity during the preparation of colloidal CuInS2 NCs and post-synthesis cation exchange. The precise nano-synthesis coupled with a series of hybridization strategies has given birth to a library of CuInS2 NCs with highly customizable photophysical properties. This review article focuses on the recent development of CuInS2 NCs enabled by advanced synthetic and hybridization techniques. We show that the state-of-the-art CuInS2 NCs play significant roles in optoelectronic and biomedical applications.
Collapse
Affiliation(s)
- Bing Chen
- College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, Jiangsu 210023, China.
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon 999077, Hong Kong SAR, China.
| | - Weilin Zheng
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon 999077, Hong Kong SAR, China.
- City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Fengjun Chun
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon 999077, Hong Kong SAR, China.
- City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| | - Xiuwen Xu
- College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, Jiangsu 210023, China.
| | - Qiang Zhao
- College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, Jiangsu 210023, China.
- State Key Laboratory of Organic Electronics and Information Displays, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Feng Wang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon 999077, Hong Kong SAR, China.
- City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China
| |
Collapse
|
9
|
Hong Y, Yu C, Je H, Park JY, Kim T, Baik H, Tomboc GM, Kim Y, Ha JM, Joo J, Kim CW, Woo HY, Park S, Choi DH, Lee K. Perovskite Nanocrystals Protected by Hermetically Sealing for Highly Bright and Stable Deep-Blue Light-Emitting Diodes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302906. [PMID: 37271888 PMCID: PMC10427390 DOI: 10.1002/advs.202302906] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Indexed: 06/06/2023]
Abstract
Metal-halide perovskite nanocrystals (NCs) have emerged as suitable light-emitting materials for light-emitting diodes (LEDs) and other practical applications. However, LEDs with perovskite NCs undergo environment-induced and ion-migration-induced structural degradation during operation; therefore, novel NC design concepts, such as hermetic sealing of the perovskite NCs, are required. Thus far, viable synthetic conditions to form a robust and hermetic semiconducting shell on perovskite NCs have been rarely reported for LED applications because of the difficulties in the delicate engineering of encapsulation techniques. Herein, a highly bright and durable deep-blue perovskite LED (PeLED) formed by hermetically sealing perovskite NCs with epitaxial ZnS shells is reported. This shell protects the perovskite NCs from the environment, facilitates charge injection/transport, and effectively suppresses interparticle ion migration during the LED operation, resulting in exceptional brightness (2916 cd m-2 ) at 451 nm and a high external quantum efficiency of 1.32%. Furthermore, even in the unencapsulated state, the LED shows a long operational lifetime (T50 ) of 1192 s (≈20 min) in the air. These results demonstrate that the epitaxial and hermetic encapsulation of perovskite NCs is a powerful strategy for fabricating high-performance deep-blue-emitting PeLEDs.
Collapse
Affiliation(s)
- Yongju Hong
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Chungman Yu
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Hyeondoo Je
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Jin Young Park
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Taekyung Kim
- Korea Basic Science Institute (KBSI)Seoul02841Republic of Korea
| | - Hionsuck Baik
- Korea Basic Science Institute (KBSI)Seoul02841Republic of Korea
| | - Gracita M. Tomboc
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Youngseo Kim
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Jung Min Ha
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Jinwhan Joo
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Chai Won Kim
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Han Young Woo
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Sungnam Park
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Dong Hoon Choi
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| | - Kwangyeol Lee
- Department of Chemistry and Research Institute for Natural SciencesKorea UniversitySeoul02841Republic of Korea
| |
Collapse
|
10
|
Wang H, Dong X, Wang H, Ren X, Wang H, Wei Q, Wu D. A novel construction strategy of photoelectrochemical immunosensor for detecting neuron-specific enolase: Sensing mode integrating photoanode and photocathode. Talanta 2023; 260:124651. [PMID: 37187031 DOI: 10.1016/j.talanta.2023.124651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 04/20/2023] [Accepted: 05/04/2023] [Indexed: 05/17/2023]
Abstract
In the realm of photoelectrochemical (PEC) analysis, it is customary to employ a lone photoanode or photocathode system for analyte detection. Nonetheless, such a single detection scheme inherently carries some deficiencies. While photoanode-based PEC immunoassay methods do exhibit conspicuous photocurrent responses and heightened sensitivity, they do suffer from inadequate resistance to interference when detecting in real sample detection. Photocathode-based analysis methods are capable of effectively surmounting the limitations of photoanode-based analysis methods, but their stability is poor. Based on the above reasons, this paper reports a novel immunosensing system combining ITO/WO3/Bi2S3 photoanode and ITO/CuInS2 photocathode. The system that incorporates both photoanode and photocathode exhibits a steady and discernible photocurrent, possesses robust resistance to external interference, and has effectively accomplished the quantification of NSE in the linear range from 5 pg/mL to 30 ng/mL. Remarkably, the detection limit has been determined to be 1.59 pg/mL. Besides the notable advantages of satisfactory stability, exceptional specificity, and outstanding reproducibility, the sensing system also introduces an innovative approach to fabricate PEC immunosensors.
Collapse
Affiliation(s)
- Hanyu Wang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 50024, PR China
| | - Xue Dong
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 50024, PR China
| | - Hui Wang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 50024, PR China
| | - Xiang Ren
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 50024, PR China
| | - Huan Wang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 50024, PR China
| | - Qin Wei
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 50024, PR China
| | - Dan Wu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 50024, PR China.
| |
Collapse
|
11
|
Singha PK, Kistwal T, Datta A. Single-Particle Dynamics of ZnS Shelling Induced Replenishment of Carrier Diffusion for Individual Emission Centers in CuInS 2 Quantum Dots. J Phys Chem Lett 2023; 14:4289-4296. [PMID: 37126796 DOI: 10.1021/acs.jpclett.3c00467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Insights into blinking and photoactivation of aqueous copper indium sulfide (CIS) quantum dots have been obtained using fluorescence correlation spectroscopy (FCS) and fluorescence lifetime correlation spectroscopy (FLCS). An unusual excitation wavelength-dependence of photoactivation/photocorrosion is manifested in an increase in the initial correlation amplitude G(0) for λex = 532 nm, but a decrease for λex = 405 nm. This has been rationalized in terms of different contributions from surface-assisted recombination in the two cases. Blinking times obtained from the autocorrelation functions (ACFs) of the 100-200 ns lifetime component (core Cu-mediated recombination) are almost unaffected by shelling, but those from the ACF for the 10-30 ns lifetime (surface states) increase significantly. Absence of cross-correlation between the two recombinative states of bare CIS QDs and the emergence of an anticorrelation with the introduction of the ZnS shell are observed, indicating the diffusive nature of the two states for CIS-ZnS. The diffusion is inhibited in bare CIS QDs due to the preponderance of surface states.
Collapse
Affiliation(s)
- Prajit Kumar Singha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Tanuja Kistwal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| |
Collapse
|
12
|
Fan XB, Shin DW, Lee S, Ye J, Yu S, Morgan DJ, Arbab A, Yang J, Jo JW, Kim Y, Jung SM, Davies PR, Rao A, Hou B, Kim JM. InP/ZnS quantum dot photoluminescence modulation via in situ H 2S interface engineering. NANOSCALE HORIZONS 2023; 8:522-529. [PMID: 36790218 DOI: 10.1039/d2nh00436d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
InP quantum dots (QDs) are attracting significant interest as a potentially less toxic alternative to Cd-based QDs in many research areas. Although InP-based core/shell QDs with excellent photoluminescence properties have been reported so far, sophisticated interface treatment to eliminate defects is often necessary. Herein, using aminophosphine as a seeding source of phosphorus, we find that H2S can be efficiently generated from the reaction between a thiol and an alkylamine at high temperatures. Apart from general comprehension that H2S acts as a S precursor, it is revealed that with core etching by H2S, the interface between InP and ZnS can be reconstructed with S2- incorporation. Such a transition layer can reduce inherent defects at the interface, resulting in significant photoluminescence (PL) enhancement. Meanwhile, the size of the InP core could be further controlled by H2S etching, which offers a feasible process to obtain wide band gap InP-based QDs with blue emission.
Collapse
Affiliation(s)
- Xiang-Bing Fan
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Dong-Wook Shin
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Sanghyo Lee
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Junzhi Ye
- The Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK
| | - Shan Yu
- School of New Energy and Materials, Southwest Petroleum University, Chengdu, 610500, China
| | - David J Morgan
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK
| | - Adrees Arbab
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Jiajie Yang
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Jeong-Wan Jo
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Yoonwoo Kim
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Sung-Min Jung
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - Philip R Davies
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK
| | - Akshay Rao
- The Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, CB3 0HE, UK
| | - Bo Hou
- School of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA, UK
| | - Jong Min Kim
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| |
Collapse
|
13
|
Dzhagan V, Litvinchuk AP, Valakh MY, Zahn DRT. Phonon Raman spectroscopy of nanocrystalline multinary chalcogenides as a probe of complex lattice structures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 35:103001. [PMID: 36575889 DOI: 10.1088/1361-648x/acaa18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Ternary (I-III-VI) and quaternary (I-II-IV-VI) metal-chalcogenides like CuInS2or Cu2ZnSn(S,Se)4are among the materials currently most intensively investigated for various applications in the area of alternative energy conversion and light-emitting devices. They promise more sustainable and affordable solutions to numerous applications, compared to more developed and well understood II-VI and III-V semiconductors. Potentially superior properties are based on an unprecedented tolerance of these compounds to non-stoichiometric compositions and polymorphism. However, if not properly controlled, these merits lead to undesirable coexistence of different compounds in a single polycrystalline lattice and huge concentrations of point defects, becoming an immense hurdle on the way toward real-life applications. Raman spectroscopy of phonons has become one of the most powerful tools of structural diagnostics and probing physical properties of bulk and microcrystalline I-III-VI and I-II-IV-VI compounds. The recent explosive growth of the number of reports on fabrication and characterization of nanostructures of these compounds must be pointed out as well as the steady use of Raman spectroscopy for their characterization. Interpretation of the vibrational spectra of these compound nanocrystals (NCs) and conclusions about their structure can be complicated compared to bulk counterparts because of size and surface effects as well as emergence of new structural polymorphs that are not realizable in the bulk. This review attempts to summarize the present knowledge in the field of I-III-VI and I-II-IV-VI NCs regarding their phonon spectra and capabilities of Raman and IR spectroscopies in the structural characterizations of these promising families of compounds.
Collapse
Affiliation(s)
- Volodymyr Dzhagan
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03038 Kyiv, Ukraine
- Physics Department, Taras Shevchenko National University of Kyiv, 60 Volodymyrs'ka str., 01601 Kyiv, Ukraine
| | - Alexander P Litvinchuk
- Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204-5002, United States of America
| | - Mykhailo Ya Valakh
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03038 Kyiv, Ukraine
| | - Dietrich R T Zahn
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
| |
Collapse
|
14
|
Zang S, Zhang X, Sun Y, Li N, Wang L, Li LS. Ligand-assisted structure tailoring of highly luminescent Cu-In-Zn-S/ZnS//ZnS quantum dots for bright and stable light-emitting diodes. Front Chem 2022; 10:1102514. [PMID: 36583153 PMCID: PMC9792774 DOI: 10.3389/fchem.2022.1102514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022] Open
Abstract
Harnessing environment-friendly and low-cost multinary Cu-In-Zn-S quantum dots (QDs) as emitters for light-emitting diodes (LEDs) has attracted great attention for display and lighting application. However, suboptimal QD structure is a huge obstacle, which results in serious non-radiative recombination and efficiency roll-off. Herein, we synthesized structure-tailored Cu-In-Zn-S/ZnS//ZnS QDs by improving the reactivity of shell growth by 2-ethylhexanoic acid (EHA) ligands. The EHA-assisted shell growth can boost an extended alloyed layer at the core-shell interface and a smoothed confinement barrier, which effectively passivate the interface defects and suppress Förster resonance energy transfer (FRET) process. These synthesized QDs display a bright photoluminescence emission (quantum yield of 83%) and a larger size of 8.4 nm. Moreover, the resulting LEDs based on the EHA-assisted QDs exhibit a maximum luminance of 8074 cd/m2, and a current efficiency of 7.3 cd/A with a low efficiency roll-off. Our results highlight a remarkable ligand strategy to tailor the QD structure for high performance QD-based LEDs.
Collapse
Affiliation(s)
- Shuaipu Zang
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials, Henan University, Kaifeng, China,College of Science, Zhongyuan University of Technology, Zhengzhou, China
| | - Xuhui Zhang
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials, Henan University, Kaifeng, China
| | - Yingying Sun
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials, Henan University, Kaifeng, China
| | - Ning Li
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials, Henan University, Kaifeng, China
| | - Lei Wang
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials, Henan University, Kaifeng, China,*Correspondence: Lei Wang, ; Lin Song Li,
| | - Lin Song Li
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials, Henan University, Kaifeng, China,*Correspondence: Lei Wang, ; Lin Song Li,
| |
Collapse
|
15
|
Guo X, Liu X, Yan J, Liu SF. Heterointerface Engineering of ZnO/CdS Heterostructures through ZnS Layers for Photocatalytic Water Splitting. Chemistry 2022; 28:e202202662. [PMID: 36323635 DOI: 10.1002/chem.202202662] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Indexed: 11/06/2022]
Abstract
Solar-driven water splitting to produce clean and renewable hydrogen offers a green strategy to address the energy crisis and environmental pollution. Heterostructure catalysts are receiving increasing attention for photocatalytic hydrogen generation. ZnO/ZnS/CdS and ZnO/CdS heterostructures have been successfully designed and prepared according to two different strategies. By introducing a heterointerface layer of ZnS between ZnO and CdS, a Z scheme charge-transfer channel was promoted and achieved superior photocatalytic performance. A highest hydrogen generation rate of 156.7 μmol g-1 h-1 was achieved by precise control of the thickness of the heterointerface layer and of the CdS shell. These findings demonstrated that heterostructures are promising catalysts for solar-driven water splitting, and that heterointerface engineering is an effective way to improve the photocatalytic properties of heterostructures.
Collapse
Affiliation(s)
- Xu Guo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Xing Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Junqing Yan
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Shengzhong Frank Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China.,iChem, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| |
Collapse
|
16
|
Larsen JK, Sopiha KV, Persson C, Platzer-Björkman C, Edoff M. Experimental and Theoretical Study of Stable and Metastable Phases in Sputtered CuInS 2. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200848. [PMID: 35726048 PMCID: PMC9376846 DOI: 10.1002/advs.202200848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 04/01/2022] [Indexed: 06/15/2023]
Abstract
The chalcopyrite Cu(In,Ga)S2 has gained renewed interest in recent years due to the potential application in tandem solar cells. In this contribution, a combined theoretical and experimental approach is applied to investigate stable and metastable phases forming in CuInS2 (CIS) thin films. Ab initio calculations are performed to obtain formation energies, X-ray diffraction (XRD) patterns, and Raman spectra of CIS polytypes and related compounds. Multiple CIS structures with zinc-blende and wurtzite-derived lattices are identified and their XRD/Raman patterns are shown to contain overlapping features, which could lead to misidentification. Thin films with compositions from Cu-rich to Cu-poor are synthesized via a two-step approach based on sputtering from binary targets followed by high-temperature sulfurization. It is discovered that several CIS polymorphs are formed when growing the material with this approach. In the Cu-poor material, wurtzite CIS is observed for the first time in sputtered thin films along with chalcopyrite CIS and CuAu-ordered CIS. Once the wurtzite CIS phase has formed, it is difficult to convert into the stable chalcopyrite polymorph. CuIn5 S8 and NaInS2 accommodating In-excess are found alongside the CIS polymorphs. It is argued that the metastable polymorphs are stabilized by off-stoichiometry of the precursors, hence tight composition control is required.
Collapse
Affiliation(s)
- Jes K Larsen
- Division of Solar Cell Technology, Department of Materials Science and Engineering, Uppsala University, Box 534, Uppsala, SE-75237, Sweden
| | - Kostiantyn V Sopiha
- Division of Solar Cell Technology, Department of Materials Science and Engineering, Uppsala University, Box 534, Uppsala, SE-75237, Sweden
| | - Clas Persson
- Centre for Materials Science and Nanotechnology/Department of Physics, University of Oslo, Blindern, Box 1048, Oslo, NO-0316, Norway
- Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, SE-10044, Sweden
| | - Charlotte Platzer-Björkman
- Division of Solar Cell Technology, Department of Materials Science and Engineering, Uppsala University, Box 534, Uppsala, SE-75237, Sweden
| | - Marika Edoff
- Division of Solar Cell Technology, Department of Materials Science and Engineering, Uppsala University, Box 534, Uppsala, SE-75237, Sweden
| |
Collapse
|
17
|
Campos MP, De Roo J, Greenberg MW, McMurtry BM, Hendricks MP, Bennett E, Saenz N, Sfeir MY, Abécassis B, Ghose SK, Owen JS. Growth kinetics determine the polydispersity and size of PbS and PbSe nanocrystals. Chem Sci 2022; 13:4555-4565. [PMID: 35656143 PMCID: PMC9019910 DOI: 10.1039/d1sc06098h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 03/16/2022] [Indexed: 12/13/2022] Open
Abstract
A library of thio- and selenourea derivatives is used to adjust the kinetics of PbE (E = S, Se) nanocrystal formation across a 1000-fold range (k r = 10-1 to 10-4 s-1), at several temperatures (80-120 °C), under a standard set of conditions (Pb : E = 1.2 : 1, [Pb(oleate)2] = 10.8 mM, [chalcogenourea] = 9.0 mM). An induction delay (t ind) is observed prior to the onset of nanocrystal absorption during which PbE solute is observed using in situ X-ray total scattering. Density functional theory models fit to the X-ray pair distribution function (PDF) support a Pb2(μ2-S)2(Pb(O2CR)2)2 structure. Absorption spectra of aliquots reveal a continuous increase in the number of nanocrystals over more than half of the total reaction time at low temperatures. A strong correlation between the width of the nucleation phase and reaction temperature is observed that does not correlate with the polydispersity. These findings are antithetical to the critical concentration dependence of nucleation that underpins the La Mer hypothesis and demonstrates that the duration of the nucleation period has a minor influence on the size distribution. The results can be explained by growth kinetics that are size dependent, more rapid at high temperature, and self limiting at low temperatures.
Collapse
Affiliation(s)
- Michael P Campos
- Department of Chemistry, Columbia University New York New York 10027 USA
| | - Jonathan De Roo
- Department of Chemistry, Columbia University New York New York 10027 USA
- Department of Chemistry, University of Basel Basel 4058 Switzerland
| | | | - Brandon M McMurtry
- Department of Chemistry, Columbia University New York New York 10027 USA
| | - Mark P Hendricks
- Department of Chemistry, Columbia University New York New York 10027 USA
- Department of Chemistry, Whitman College Walla Walla Washington 99362 USA
| | - Ellie Bennett
- Department of Chemistry, Columbia University New York New York 10027 USA
| | - Natalie Saenz
- Department of Chemistry, Columbia University New York New York 10027 USA
| | - Matthew Y Sfeir
- Center for Functional Nanomaterials, Brookhaven National Laboratory Upton New York 11973 USA
- Photonics Initiative, Advanced Science Research Center, City University of New York New York New York 10031 USA
- Department of Physics, Graduate Center, City University of New York New York New York 10016 USA
| | - Benjamin Abécassis
- ENSL, CNRS, Laboratoire de Chimie UMR 5182 46 allée d'Italie 69364 Lyon France
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides 91405 Orsay France
| | - Sanjit K Ghose
- National Synchrotron Light Source II, Brookhaven National Laboratory Brookhaven New York USA
| | - Jonathan S Owen
- Department of Chemistry, Columbia University New York New York 10027 USA
| |
Collapse
|
18
|
Photoluminescent, "ice-cream cone" like Cu-In-(Zn)-S/ZnS nanoheterostructures. Sci Rep 2022; 12:5787. [PMID: 35388059 PMCID: PMC8987046 DOI: 10.1038/s41598-022-09646-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 03/21/2022] [Indexed: 11/08/2022] Open
Abstract
Copper based ternary and quaternary quantum confined nanostructures have attracted huge attention over recent years due to their potential applications in photonics, photovoltaics, imaging, sensing and other areas. However, anisotropic nanoheterostructures of this type are still poorly explored to date, despite numerous predictions of the distinctive optical properties of these highly fluorescent heavy metal free nanostructures. Here, we report new fluorescent multicomponent Cu-In-(Zn)-S/ZnS nanoheterostructures with a unique anisotropic "ice-cream cone" like morphology. These nanostructures have been prepared with a seeded growth technique and exhibit distinct photophysical properties with maximum emission in the visible range (≈ 640 nm) and long photoluminescence lifetimes (τaverage ≥ 300 ns). In depth time interval studies have been carried out to better understand the step by step growth mechanism of this distinct "ice-cream cone" like geometry. We have demonstrated that the crystal structure evolution from the zinc blende Cu-In-S core to the wurtzite "ice cream cone" like Cu-In-(Zn)-S/ZnS nanocrystals plays a key role in the origin of this morphology. This research opens new possibilities to produce unique fluorescent Cu-based multicomponent anisotropic heteronanostructures, while also offering a distinctive insight into the design of bespoke nanostructures, which could find a range of potential applications.
Collapse
|
19
|
Li J, Guan T, Tu D, Lian W, Zhang P, Han S, Wen F, Chen X. Highly efficient NIR-II luminescent I-III-VI semiconductor nanoprobes based on AgInTe 2:Zn/ZnS nanocrystals. Chem Commun (Camb) 2022; 58:2204-2207. [PMID: 35072671 DOI: 10.1039/d1cc05533j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Highly efficient luminescence of AgInTe2:Zn/ZnS nanocrystals with the maximum NIR-II quantum yield of 25.2% has been designed through elaborately manipulating the structure to reduce their internal and surface defects. These AgInTe2:Zn/ZnS nanoprobes were employed for sensitive homogeneous biodetection of xanthine oxidase with the limit of detection down to 25 nU L-1.
Collapse
Affiliation(s)
- Jiayao Li
- College of Chemical Engineering, Fuzhou University, Fujian 350116, China. .,CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Tianyong Guan
- College of Chemical Engineering, Fuzhou University, Fujian 350116, China. .,CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Datao Tu
- College of Chemical Engineering, Fuzhou University, Fujian 350116, China. .,CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Wei Lian
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Peng Zhang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Siyuan Han
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Fei Wen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Xueyuan Chen
- College of Chemical Engineering, Fuzhou University, Fujian 350116, China. .,CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| |
Collapse
|
20
|
Singh R, Akhil S, Dutt VGV, Mishra N. Shell thickness dependent photostability studies of green-emitting "Giant" quantum dots. NANOSCALE ADVANCES 2021; 3:6984-6991. [PMID: 36132372 PMCID: PMC9417657 DOI: 10.1039/d1na00663k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 09/21/2021] [Indexed: 06/14/2023]
Abstract
Highly efficient green-emitting core/shell giant quantum dots have been synthesized through a facile "one-pot" gradient alloy approach. Furthermore, an additional ZnS shell was grown using the "Successive Ionic Layer Adsorption and Reaction" (SILAR) method. Due to the faster reactivity of Cd and Se compared to an analogue of Zn and S precursors it is presumed that CdSe nuclei are initially formed as the core and gradient alloy shells simultaneously encapsulate the core in an energy-gradient manner and eventually thick ZnS shells were formed. Using this gradient alloy approach, we have synthesized four different sized green-emitting giant core-shell quantum dots to study their shell thickness-dependent photostability under continuous UV irradiation, and temperature-dependent PL properties of nanocrystals. There was a minimum effect of the UV light exposure on the photostability beyond a certain thickness of the shell. The QDs with a diameter of ≥8.5 nm show substantial improvement in photostability compared to QDs with a diameter ≤ 7.12 nm when continuously irradiated under strong UV light (8 W cm-2, 365 nm) for 48 h. The effect of temperature on the photoluminescence intensities was studied with respect to the shell thickness. There were no apparent changes in PL intensities observed for the QDs ≥ 8.5 nm, on the contrary, for example, QDs with <8.5 nm in diameter (for ∼7.12 nm) show a decrease in PL intensity at higher temperatures ∼ 90 °C. The synthesized green-emitting gradient alloy QDs with superior optical properties can be used for highly efficient green-emitters and are potentially applicable for the fabrication of green LEDs.
Collapse
Affiliation(s)
- Rahul Singh
- Department of Chemistry, SRM University-AP Amaravati, Neerukonda Guntur(Dt) Andhra Pradesh 522240 India
| | - Syed Akhil
- Department of Chemistry, SRM University-AP Amaravati, Neerukonda Guntur(Dt) Andhra Pradesh 522240 India
| | - V G Vasavi Dutt
- Department of Chemistry, SRM University-AP Amaravati, Neerukonda Guntur(Dt) Andhra Pradesh 522240 India
| | - Nimai Mishra
- Department of Chemistry, SRM University-AP Amaravati, Neerukonda Guntur(Dt) Andhra Pradesh 522240 India
| |
Collapse
|
21
|
Xia C, Tamarat P, Hou L, Busatto S, Meeldijk JD, de Mello Donega C, Lounis B. Unraveling the Emission Pathways in Copper Indium Sulfide Quantum Dots. ACS NANO 2021; 15:17573-17581. [PMID: 34546035 DOI: 10.1021/acsnano.1c04909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Semiconductor copper indium sulfide quantum dots are emerging as promising alternatives to cadmium- and lead-based chalcogenides in solar cells, luminescent solar concentrators, and deep-tissue bioimaging due to their inherently lower toxicity and outstanding photoluminescence properties. However, the nature of their emission pathways remains a subject of debate. Using low-temperature single quantum dot spectroscopy on core-shell copper indium sulfide nanocrystals, we observe two subpopulations of particles with distinct spectral features. The first class shows sharp resolution-limited emission lines that are attributed to zero-phonon recombination lines of a long-lived band-edge exciton. Such emission results from the perfect passivation of the copper indium sulfide core by the zinc sulfide shell and points to an inversion in the band-edge hole levels. The second class exhibits ultrabroad spectra regardless of the temperature, which is a signature of the extrinsic self-trapping of the hole assisted by defects in imperfectly passivated quantum dots.
Collapse
Affiliation(s)
- Chenghui Xia
- LP2N, Université de Bordeaux, Talence F-33405, France
- LP2N, Institut d'Optique and CNRS, Talence F-33405, France
| | - Philippe Tamarat
- LP2N, Université de Bordeaux, Talence F-33405, France
- LP2N, Institut d'Optique and CNRS, Talence F-33405, France
| | - Lei Hou
- LP2N, Université de Bordeaux, Talence F-33405, France
- LP2N, Institut d'Optique and CNRS, Talence F-33405, France
| | - Serena Busatto
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Johannes D Meeldijk
- Electron Microscopy Utrecht, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CH Utrecht, Netherlands
| | - Celso de Mello Donega
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Brahim Lounis
- LP2N, Université de Bordeaux, Talence F-33405, France
- LP2N, Institut d'Optique and CNRS, Talence F-33405, France
| |
Collapse
|
22
|
Hudry D, De Backer A, Popescu R, Busko D, Howard IA, Bals S, Zhang Y, Pedrazo-Tardajos A, Van Aert S, Gerthsen D, Altantzis T, Richards BS. Interface Pattern Engineering in Core-Shell Upconverting Nanocrystals: Shedding Light on Critical Parameters and Consequences for the Photoluminescence Properties. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2104441. [PMID: 34697908 DOI: 10.1002/smll.202104441] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/01/2021] [Indexed: 06/13/2023]
Abstract
Advances in controlling energy migration pathways in core-shell lanthanide (Ln)-based hetero-nanocrystals (HNCs) have relied heavily on assumptions about how optically active centers are distributed within individual HNCs. In this article, it is demonstrated that different types of interface patterns can be formed depending on shell growth conditions. Such interface patterns are not only identified but also characterized with spatial resolution ranging from the nanometer- to the atomic-scale. In the most favorable cases, atomic-scale resolved maps of individual particles are obtained. It is also demonstrated that, for the same type of core-shell architecture, the interface pattern can be engineered with thicknesses of just 1 nm up to several tens of nanometers. Total alloying between the core and shell domains is also possible when using ultra-small particles as seeds. Finally, with different types of interface patterns (same architecture and chemical composition of the core and shell domains) it is possible to modify the output color (yellow, red, and green-yellow) or change (improvement or degradation) the absolute upconversion quantum yield. The results presented in this article introduce an important paradigm shift and pave the way toward the emergence of a new generation of core-shell Ln-based HNCs with better control over their atomic-scale organization.
Collapse
Affiliation(s)
- Damien Hudry
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Annick De Backer
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Radian Popescu
- Laboratory for Electron Microscopy, Karlsruhe Institute of Technology, Engesserstrasse 7, 76131, Karlsruhe, Germany
| | - Dmitry Busko
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Ian A Howard
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Light Technology Institute, Karlsruhe Institute of Technology, Engesserstrasse 13, 76131, Karlsruhe, Germany
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Yang Zhang
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Adrian Pedrazo-Tardajos
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Sandra Van Aert
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Dagmar Gerthsen
- Laboratory for Electron Microscopy, Karlsruhe Institute of Technology, Engesserstrasse 7, 76131, Karlsruhe, Germany
| | - Thomas Altantzis
- Electron Microscopy for Materials Science (EMAT), University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
- NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp, 2020, Belgium
| | - Bryce S Richards
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Light Technology Institute, Karlsruhe Institute of Technology, Engesserstrasse 13, 76131, Karlsruhe, Germany
| |
Collapse
|
23
|
Xia C, van Oversteeg CHM, Bogaards VCL, Spanjersberg THM, Visser NL, Berends AC, Meeldijk JD, de Jongh PE, de Mello Donega C. Synthesis and Formation Mechanism of Colloidal Janus-Type Cu 2-xS/CuInS 2 Heteronanorods via Seeded Injection. ACS NANO 2021; 15:9987-9999. [PMID: 34110780 PMCID: PMC8291760 DOI: 10.1021/acsnano.1c01488] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 06/08/2021] [Indexed: 06/12/2023]
Abstract
Colloidal heteronanocrystals allow for the synergistic combination of properties of different materials. For example, spatial separation of the photogenerated electron and hole can be achieved by coupling different semiconductors with suitable band offsets in one single nanocrystal, which is beneficial for improving the efficiency of photocatalysts and photovoltaic devices. From this perspective, axially segmented semiconductor heteronanorods with a type-II band alignment are particularly attractive since they ensure the accessibility of both photogenerated charge carriers. Here, a two-step synthesis route to Cu2-xS/CuInS2 Janus-type heteronanorods is presented. The heteronanorods are formed by injection of a solution of preformed Cu2-xS seed nanocrystals in 1-dodecanethiol into a solution of indium oleate in oleic acid at 240 °C. By varying the reaction time, Janus-type heteronanocrystals with different sizes, shapes, and compositions are obtained. A mechanism for the formation of the heteronanocrystals is proposed. The first step of this mechanism consists of a thiolate-mediated topotactic, partial Cu+ for In3+ cation exchange that converts one of the facets of the seed nanocrystals into CuInS2. This is followed by homoepitaxial anisotropic growth of wurtzite CuInS2. The Cu2-xS seed nanocrystals also act as sacrificial Cu+ sources, and therefore, single composition CuInS2 nanorods are eventually obtained if the reaction is allowed to proceed to completion. The two-stage seeded growth method developed in this work contributes to the rational synthesis of Cu2-xS/CuInS2 heteronanocrystals with targeted architectures by allowing one to exploit the size and faceting of premade Cu2-xS seed nanocrystals to direct the growth of the CuInS2 segment.
Collapse
Affiliation(s)
- Chenghui Xia
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Christina H. M. van Oversteeg
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- Materials
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Veerle C. L. Bogaards
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Tim H. M. Spanjersberg
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Nienke L. Visser
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- Materials
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Anne C. Berends
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Johannes D. Meeldijk
- Materials
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Petra E. de Jongh
- Materials
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Celso de Mello Donega
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| |
Collapse
|
24
|
Emission tuning of highly efficient quaternary Ag-Cu-Ga-Se/ZnSe quantum dots for white light-emitting diodes. J Colloid Interface Sci 2021; 602:307-315. [PMID: 34130177 DOI: 10.1016/j.jcis.2021.05.110] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/26/2021] [Accepted: 05/19/2021] [Indexed: 11/21/2022]
Abstract
With the blooming development of zero-dimensional nanomaterials, I-III-VI alloying quantum dots (QDs) with outstanding photoelectrical properties have emerged to attract much attention as promising environmentally-friendly substitutions for conventional binary Cd-based QDs. In this work, a facile one-pot method was introduced to synthesize unreported quaternary Ag-Cu-Ga-Se/ZnSe (ACGSe/ZnSe) QDs. A relatively high photoluminescence quantum yield (PL QY) of 71.9% and a tunable emission from 510 to 620 nm were successfully achieved. We explored the roles of alloying compositions in ACGSe/ZnSe QDs, inferring that increased Ag proportion would not only lower the Vdefect level which leads to the blue shift of emission, but also slow the ZnSe shelling process owing to the larger lattice distortion. At last, the white light-emitting diodes (WLEDs) were fabricated with ACGSe/ZnSe QDs as the conversion layer, indicating that the as-prepared QDs are a promising candidate for further applications.
Collapse
|
25
|
Prudnikau A, Shiman DI, Ksendzov E, Harwell J, Bolotina EA, Nikishau PA, Kostjuk SV, Samuel IDW, Lesnyak V. Design of cross-linked polyisobutylene matrix for efficient encapsulation of quantum dots. NANOSCALE ADVANCES 2021; 3:1443-1454. [PMID: 36132870 PMCID: PMC9418506 DOI: 10.1039/d0na01012j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/19/2021] [Indexed: 05/08/2023]
Abstract
Photoluminescent quantum dots (QDs) are a prominent example of nanomaterials used in practical applications, especially in light-emitting and light-converting devices. Most of the current applications of QDs require formation of thin films or their incorporation in solid matrices. The choice of an appropriate host material capable of preventing QDs from degradation and developing a process of uniform incorporation of QDs in the matrix have become essential scientific and technological challenges. In this work, we developed a method of uniform incorporation of Cu-Zn-In-S (CZIS) QDs into a highly protective cross-linked polyisobutylene (PIB) matrix with high chemical resistance and low gas permeability. Our approach involves the synthesis of a methacrylate-terminated three-arm star-shaped PIB oligomeric precursor capable of quick formation of a robust 3D polymer network upon exposure to UV-light, as well as the design of a special ligand introducing short PIB chains onto the surface of the QDs, thus providing compatibility with the matrix. The obtained cross-linked QDs-in-polymer composites underwent a complex photostability test in air and under vacuum as well as a chemical stability test. These tests found that CZIS QDs in a cross-linked PIB matrix demonstrated excellent photo- and chemical stability when compared to identical QDs in widely used polyacrylate-based matrices. These results make the composites developed excellent materials for the fabrication of robust, stable and durable transparent light conversion layers.
Collapse
Affiliation(s)
- Anatol Prudnikau
- Physical Chemistry, TU Dresden Zellescher Weg 19 01069 Dresden Germany
| | - Dmitriy I Shiman
- Research Institute for Physical Chemical Problems of the Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
| | - Evgenii Ksendzov
- Physical Chemistry, TU Dresden Zellescher Weg 19 01069 Dresden Germany
- Research Institute for Physical Chemical Problems of the Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
| | - Jonathon Harwell
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St. Andrews North Haugh St Andrews Fife KY16 9SS UK
| | - Ekaterina A Bolotina
- Physical Chemistry, TU Dresden Zellescher Weg 19 01069 Dresden Germany
- Research Institute for Physical Chemical Problems of the Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
- Department of Chemistry, Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
| | - Pavel A Nikishau
- Research Institute for Physical Chemical Problems of the Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
| | - Sergei V Kostjuk
- Research Institute for Physical Chemical Problems of the Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University 119991 Moscow Russia
- Department of Chemistry, Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus
| | - Ifor D W Samuel
- Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St. Andrews North Haugh St Andrews Fife KY16 9SS UK
| | - Vladimir Lesnyak
- Physical Chemistry, TU Dresden Zellescher Weg 19 01069 Dresden Germany
| |
Collapse
|
26
|
Hinterding SM, Mangnus MJJ, Prins PT, Jöbsis HJ, Busatto S, Vanmaekelbergh D, de Mello Donega C, Rabouw FT. Unusual Spectral Diffusion of Single CuInS 2 Quantum Dots Sheds Light on the Mechanism of Radiative Decay. NANO LETTERS 2021; 21:658-665. [PMID: 33395305 PMCID: PMC7809691 DOI: 10.1021/acs.nanolett.0c04239] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The luminescence of CuInS2 quantum dots (QDs) is slower and spectrally broader than that of many other types of QDs. The origin of this anomalous behavior is still under debate. Single-QD experiments could help settle this debate, but studies by different groups have yielded conflicting results. Here, we study the photophysics of single core-only CuInS2 and core/shell CuInS2/CdS QDs. Both types of single QDs exhibit broad PL spectra with fluctuating peak position and single-exponential photoluminescence decay with a slow but fluctuating lifetime. Spectral diffusion of CuInS2-based QDs is qualitatively and quantitatively different from CdSe-based QDs. The differences reflect the dipole moment of the CuInS2 excited state and hole localization on a preferred site in the QD. Our results unravel the highly dynamic photophysics of CuInS2 QDs and highlight the power of the analysis of single-QD property fluctuations.
Collapse
Affiliation(s)
- Stijn
O. M. Hinterding
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584CG Utrecht, The Netherlands
| | - Mark J. J. Mangnus
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584CG Utrecht, The Netherlands
| | - P. Tim Prins
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
| | - Huygen J. Jöbsis
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
| | - Serena Busatto
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
| | - Daniël Vanmaekelbergh
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
| | - Celso de Mello Donega
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
| | - Freddy T. Rabouw
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584CC Utrecht, The Netherlands
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584CG Utrecht, The Netherlands
| |
Collapse
|
27
|
Xia C, Pedrazo-Tardajos A, Wang D, Meeldijk JD, Gerritsen HC, Bals S, de Mello Donega C. Seeded Growth Combined with Cation Exchange for the Synthesis of Anisotropic Cu 2-x S/ZnS, Cu 2-x S, and CuInS 2 Nanorods. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2021; 33:102-116. [PMID: 33456135 PMCID: PMC7808334 DOI: 10.1021/acs.chemmater.0c02817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 11/03/2020] [Indexed: 06/12/2023]
Abstract
Colloidal copper(I) sulfide (Cu2-x S) nanocrystals (NCs) have attracted much attention for a wide range of applications because of their unique optoelectronic properties, driving scientists to explore the potential of using Cu2-x S NCs as seeds in the synthesis of heteronanocrystals to achieve new multifunctional materials. Herein, we developed a multistep synthesis strategy toward Cu2-x S/ZnS heteronanorods. The Janus-type Cu2-x S/ZnS heteronanorods are obtained by the injection of hexagonal high-chalcocite Cu2-x S seed NCs in a hot zinc oleate solution in the presence of suitable surfactants, 20 s after the injection of sulfur precursors. The Cu2-x S seed NCs undergo rapid aggregation and coalescence in the first few seconds after the injection, forming larger NCs that act as the effective seeds for heteronucleation and growth of ZnS. The ZnS heteronucleation occurs on a single (100) facet of the Cu2-x S seed NCs and is followed by fast anisotropic growth along a direction that is perpendicular to the c-axis, thus leading to Cu2-x S/ZnS Janus-type heteronanorods with a sharp heterointerface. Interestingly, the high-chalcocite crystal structure of the injected Cu2-x S seed NCs is preserved in the Cu2-x S segments of the heteronanorods because of the high-thermodynamic stability of this Cu2-x S phase. The Cu2-x S/ZnS heteronanorods are subsequently converted into single-component Cu2-x S and CuInS2 nanorods by postsynthetic topotactic cation exchange. This work expands the possibilities for the rational synthesis of colloidal multicomponent heteronanorods by allowing the design principles of postsynthetic heteroepitaxial seeded growth and nanoscale cation exchange to be combined, yielding access to a plethora of multicomponent heteronanorods with diameters in the quantum confinement regime.
Collapse
Affiliation(s)
- Chenghui Xia
- Debye
Institute for Nanomaterials Science, Utrecht
University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | | | - Da Wang
- EMAT-University
of Antwerp, Groenenborgerlaan
171, B-2020 Antwerp, Belgium
| | - Johannes D. Meeldijk
- Debye
Institute for Nanomaterials Science, Utrecht
University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Hans C. Gerritsen
- Debye
Institute for Nanomaterials Science, Utrecht
University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Sara Bals
- EMAT-University
of Antwerp, Groenenborgerlaan
171, B-2020 Antwerp, Belgium
| | - Celso de Mello Donega
- Debye
Institute for Nanomaterials Science, Utrecht
University, P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| |
Collapse
|
28
|
Bai X, Purcell-Milton F, Gun'ko YK. Controlled synthesis of luminescent CIZS/ZnS/ZnS core/shell/shell nanoheterostructures. CrystEngComm 2021. [DOI: 10.1039/d1ce00631b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report a systematic investigation of the influence of reaction temperatures and times on the morphologies and optical properties of resulting CIZS/ZnS/ZnS quantum nanoheterostructures with “giant” ZnS shell (size >10 nm).
Collapse
Affiliation(s)
- Xue Bai
- School of Chemistry and CRANN institute, Trinity College Dublin, Dublin 2, Dublin, Ireland
| | - Finn Purcell-Milton
- School of Chemistry and CRANN institute, Trinity College Dublin, Dublin 2, Dublin, Ireland
| | - Yurii K. Gun'ko
- School of Chemistry and CRANN institute, Trinity College Dublin, Dublin 2, Dublin, Ireland
| |
Collapse
|
29
|
Long Z, Zhang W, Tian J, Chen G, Liu Y, Liu R. Recent research on the luminous mechanism, synthetic strategies, and applications of CuInS2 quantum dots. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01228a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We discuss the synthesis and luminescence mechanisms of CuInS2 QDs, the strategies to improve their luminous performance and their potential application in light-emitting devices, solar energy conversion, and the biomedical field.
Collapse
Affiliation(s)
- Zhiwei Long
- National Engineering Research Center for Rare Earth Materials
- General Research Institute for Nonferrous Metals
- Grirem Advanced Materials Co. Ltd
- Beijing
- P. R China
| | - Wenda Zhang
- National Engineering Research Center for Rare Earth Materials
- General Research Institute for Nonferrous Metals
- Grirem Advanced Materials Co. Ltd
- Beijing
- P. R China
| | - Junhang Tian
- National Engineering Research Center for Rare Earth Materials
- General Research Institute for Nonferrous Metals
- Grirem Advanced Materials Co. Ltd
- Beijing
- P. R China
| | - Guantong Chen
- National Engineering Research Center for Rare Earth Materials
- General Research Institute for Nonferrous Metals
- Grirem Advanced Materials Co. Ltd
- Beijing
- P. R China
| | - Yuanhong Liu
- National Engineering Research Center for Rare Earth Materials
- General Research Institute for Nonferrous Metals
- Grirem Advanced Materials Co. Ltd
- Beijing
- P. R China
| | - Ronghui Liu
- National Engineering Research Center for Rare Earth Materials
- General Research Institute for Nonferrous Metals
- Grirem Advanced Materials Co. Ltd
- Beijing
- P. R China
| |
Collapse
|
30
|
Marin R, Jaque D. Doping Lanthanide Ions in Colloidal Semiconductor Nanocrystals for Brighter Photoluminescence. Chem Rev 2020; 121:1425-1462. [DOI: 10.1021/acs.chemrev.0c00692] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Riccardo Marin
- Fluorescence Imaging Group (FIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid 28049, Spain
| | - Daniel Jaque
- Fluorescence Imaging Group (FIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid 28049, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación, Sanitaria Hospital Ramón y Cajal, Ctra. De Colmenar Viejo, Km. 9100, 28034 Madrid, Spain
| |
Collapse
|
31
|
Bai T, Wang X, Dong Y, Xing S, Shi Z, Feng S. One-Pot Synthesis of High-Quality AgGaS 2/ZnS-based Photoluminescent Nanocrystals with Widely Tunable Band Gap. Inorg Chem 2020; 59:5975-5982. [PMID: 32286807 DOI: 10.1021/acs.inorgchem.9b03768] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Herein, we present a facile colloidal method to synthesize the high-quality AgGaS2 nanocrystals (NCs) within 2 min via exploiting the high-reactivity S precursor and then extend this synthetic strategy to the preparation of AgGaS2/ZnS core-shell NCs by a one-pot method without prior purification of AgGaS2 core. The as-synthesized samples were structurally characterized to confrim the formation of AgGaS2/ZnS core-shell NCs. The energy band gap of the AgGaS2/ZnS NCs can be effectively tunable from 2.98 to 2.83 eV by the control of their nonstoichiometry and further continuously decreases to 1.90 eV by the preparation of alloyed AgGaxIn1-xS2/ZnS NCs (1 ≤ x ≤ 0). Benefitting from the efficient band gap modulations, the photoluminescence (PL) colors of the AgGaS2-based NCs can cover almost the whole visible region from blue (460 nm) to red (671 nm). Our work demonstrates the one-pot synthesis of AgGaS2/ZnS core-shell NCs and their band gap engineering, which is of crucial in scalability toward industrial application and in tailoring optical characteristics of I-III-VI2 materials.
Collapse
Affiliation(s)
- Tianyu Bai
- College of Medical Laboratory, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China
| | - Xuemin Wang
- College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, PR China
| | - Yanyu Dong
- College of Medical Laboratory, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, PR China
| | - Shanghua Xing
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Zhan Shi
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China
| |
Collapse
|
32
|
Chen F, Wang LJ, Li X, Deng ZB, Teng F, Tang AW. Solution-processed double-layered hole transport layers for highly-efficient cadmium-free quantum-dot light-emitting diodes. OPTICS EXPRESS 2020; 28:6134-6145. [PMID: 32225869 DOI: 10.1364/oe.386276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/02/2020] [Indexed: 06/10/2023]
Abstract
The search for heavy-metal-free quantum-dot light-emitting diodes (QD-LEDs) has greatly intensified in the past few years because device performance still falls behind that of CdSe-based QD-LEDs. Apart from the effects of nanostructures of the emitting materials, the unbalanced charge injection and transport severely affects the performance of heavy-metal-free QD-LEDs. In this work, we presented solution-processed double hole transport layers (HTLs) for improving the device performance of heavy-metal-free Cu-In-Zn-S(CIZS)/ZnS-based QD-LEDs, in which N,N'-Bis(3-methylphenyl)-N,N'-bis(phenyl)benzidine (TPD) as an interlayer was incorporated between the emitting layer and the HTL. Through optimizing the thickness of poly(9,9-dioctylfluorene-co-N-(4-butylphenyl)diphenyl-amine (TFB) and TPD layers, a maximum external quantum efficiency (ηEQE) of 3.87% and a current efficiency of 9.20 cd A-1 were achieved in the solution-processed QD-LEDs with double-layered TFB/TPD as the HTLs, which were higher than those of the devices with pristine TFB, TPD and TFB:TPD blended layers. The performance enhancement could be attributed to the synergistic effects of the reduction of the hole injection barrier, the increase of the hole mobility and suppressed charge transfer between the HTL and the emitting layer. Furthermore, the best ηEQE of 5.61% with a mean ηEQE of 4.44 ± 0.73% was realized in the Cu-In-Zn-S-based QD-LEDs by varying the annealing temperature of TPD layer due to the more balanced charge injection and transport as well as smooth surface of TPD layer.
Collapse
|
33
|
Huang WT, Yoon SY, Wu BH, Lu KM, Lin CM, Yang H, Liu RS. Ultra-broadband near-infrared emission CuInS2/ZnS quantum dots with high power efficiency and stability for the theranostic applications of mini light-emitting diodes. Chem Commun (Camb) 2020; 56:8285-8288. [DOI: 10.1039/d0cc03030a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Broadband near-infrared CuInS2/ZnS quantum with up to 94.8% quantum yield was synthesized with fast precursor decomposition. The better power efficiency and stability of CuInS2/ZnS mini-LED were performed with penetration tests and vein imaging.
Collapse
Affiliation(s)
- Wen-Tse Huang
- Department of Chemistry and Advanced Research Center of Green Materials Science and Technology
- National Taiwan University
- Taipei 106
- Taiwan
| | - Suk-Young Yoon
- Department of Materials Science and Engineering
- Hongik University
- Seoul
- Republic of Korea
| | - Bo-Han Wu
- Everlight Electronics Co., Ltd
- New Taipei City 238
- Taiwan
| | - Kuang-Mao Lu
- Everlight Electronics Co., Ltd
- New Taipei City 238
- Taiwan
| | - Chih-Min Lin
- Everlight Electronics Co., Ltd
- New Taipei City 238
- Taiwan
| | - Heesun Yang
- Department of Materials Science and Engineering
- Hongik University
- Seoul
- Republic of Korea
| | - Ru-Shi Liu
- Department of Chemistry and Advanced Research Center of Green Materials Science and Technology
- National Taiwan University
- Taipei 106
- Taiwan
| |
Collapse
|
34
|
Ning J, Kershaw SV, Rogach AL. Synthesis and Optical Properties of Cubic Chalcopyrite/Hexagonal Wurtzite Core/Shell Copper Indium Sulfide Nanocrystals. J Am Chem Soc 2019; 141:20516-20524. [DOI: 10.1021/jacs.9b11498] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jiajia Ning
- Department of Materials Science and Engineering, and Centre for Functional Photonics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, People’s Republic of China
| | - Stephen V. Kershaw
- Department of Materials Science and Engineering, and Centre for Functional Photonics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, People’s Republic of China
| | - Andrey L. Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, People’s Republic of China
| |
Collapse
|
35
|
Yang L, Antanovich A, Prudnikau A, Taniya OS, Grzhegorzhevskii KV, Zelenovskiy P, Terpinskaya T, Tang J, Artemyev M. Highly luminescent Zn-Cu-In-S/ZnS core/gradient shell quantum dots prepared from indium sulfide by cation exchange for cell labeling and polymer composites. NANOTECHNOLOGY 2019; 30:395603. [PMID: 31212270 DOI: 10.1088/1361-6528/ab2aa2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Gradient core-shell Zn-Cu-In-S/ZnS quantum dots (QDs) of small size and with highly efficient photoluminescence were synthesized via a multi-step high-temperature method involving cation exchange. The procedure starts with the preparation of indium sulfide nanoparticles followed by the addition of Cu and Zn precursors. At this stage, Zn replaces Cu atoms and as a result the concentration of Cu ions in the final QDs is only about 5% of the total In content in a QD. Zn incorporation and the formation of a gradient ZnS shell dramatically increases the photoluminescence quantum yield. Furthermore, the formation of the ZnS shell improves the chemical stability of Cu-In-S QDs, as demonstrated by the preparation of polystyrene-QD composites and labeling of glioma cells. This work provides an effective strategy for obtaining efficient and stable fluorophores free of heavy metals.
Collapse
Affiliation(s)
- Lanlan Yang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Tech. Cooperation on Hybrid Materials, Qingdao University, 308 Ningxia Road, Qingdao 266071, People's Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Hamachi LS, Yang H, Jen-La Plante I, Saenz N, Qian K, Campos MP, Cleveland GT, Rreza I, Oza A, Walravens W, Chan EM, Hens Z, Crowther AC, Owen JS. Precursor reaction kinetics control compositional grading and size of CdSe 1-x S x nanocrystal heterostructures. Chem Sci 2019; 10:6539-6552. [PMID: 31367306 PMCID: PMC6615248 DOI: 10.1039/c9sc00989b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/14/2019] [Indexed: 12/13/2022] Open
Abstract
We report a method to control the composition and microstructure of CdSe1-x S x nanocrystals by the simultaneous injection of sulfide and selenide precursors into a solution of cadmium oleate and oleic acid at 240 °C. Pairs of substituted thio- and selenoureas were selected from a library of compounds with conversion reaction reactivity exponents (k E) spanning 1.3 × 10-5 s-1 to 2.0 × 10-1 s-1. Depending on the relative reactivity (k Se/k S), core/shell and alloyed architectures were obtained. Growth of a thick outer CdS shell using a syringe pump method provides gram quantities of brightly photoluminescent quantum dots (PLQY = 67 to 90%) in a single reaction vessel. Kinetics simulations predict that relative precursor reactivity ratios of less than 10 result in alloyed compositions, while larger reactivity differences lead to abrupt interfaces. CdSe1-x S x alloys (k Se/k S = 2.4) display two longitudinal optical phonon modes with composition dependent frequencies characteristic of the alloy microstructure. When one precursor is more reactive than the other, its conversion reactivity and mole fraction control the number of nuclei, the final nanocrystal size at full conversion, and the elemental composition. The utility of controlled reactivity for adjusting alloy microstructure is discussed.
Collapse
Affiliation(s)
- Leslie S Hamachi
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Haoran Yang
- The Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA
| | - Ilan Jen-La Plante
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Natalie Saenz
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Kevin Qian
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Michael P Campos
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Gregory T Cleveland
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Iva Rreza
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| | - Aisha Oza
- Department of Chemistry , Barnard College , New York , New York 10027 , USA .
| | - Willem Walravens
- Physics and Chemistry of Nanostructures Group (PCN) , Ghent University , B-9000 Ghent , Belgium
| | - Emory M Chan
- The Molecular Foundry , Lawrence Berkeley National Laboratory , Berkeley , CA 94720 , USA
| | - Zeger Hens
- Physics and Chemistry of Nanostructures Group (PCN) , Ghent University , B-9000 Ghent , Belgium
- Center of Nano and Biophotonics , Ghent University , B-9000 Ghent , Belgium
| | - Andrew C Crowther
- Department of Chemistry , Barnard College , New York , New York 10027 , USA .
| | - Jonathan S Owen
- Department of Chemistry , Columbia University , New York , New York 10027 , USA .
| |
Collapse
|
37
|
Hansen EC, Bertram SN, Yoo JJ, Bawendi MG. Zinc Thiolate Enables Bright Cu-Deficient Cu-In-S/ZnS Quantum Dots. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901462. [PMID: 31115971 DOI: 10.1002/smll.201901462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/03/2019] [Indexed: 05/20/2023]
Abstract
Copper indium sulfide (CIS) colloidal quantum dots (QDs) are a promising candidate for commercially viable QD-based optical applications, for example as colloidal photocatalysts or in luminescent solar concentrators (LSCs). CIS QDs with good photoluminescence quantum yields (PLQYs) and tunable emission wavelength via size and composition control are previously reported. However, developing an understanding and control over the growth of electronically passivating inorganic shells would enable further improvements of the photophysical properties of CIS QDs. To improve the optical properties of CIS QDs, the focus is on the growth of inorganic shells via the popular metal-carboxylate/alkane thiol decomposition reaction. 1) The role of Zn-carboxylate and Zn-thiolate on the formation of ZnS shells on Cu-deficient CIS (CDCIS) QDs is studied, 2) this knowledge is leveraged to yield >90% PLQY CDCIS/ZnS core/shell QDs, and 3) a mechanism for ZnS shells grown from zinc-carboxylate/alkane thiol decomposition is proposed.
Collapse
Affiliation(s)
- Eric C Hansen
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Sophie N Bertram
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Jason J Yoo
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Moungi G Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| |
Collapse
|
38
|
Liu J, Zhao X, Xu H, Wang Z, Dai Z. Amino Acid-Capped Water-Soluble Near-Infrared Region CuInS2/ZnS Quantum Dots for Selective Cadmium Ion Determination and Multicolor Cell Imaging. Anal Chem 2019; 91:8987-8993. [DOI: 10.1021/acs.analchem.9b01183] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jia Liu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Xinyu Zhao
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Hanyu Xu
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Zhaoyin Wang
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Zhihui Dai
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials and Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, P. R. China
- Nanjing Normal University Center for Analysis and Testing, Nanjing, 210023, P. R. China
| |
Collapse
|
39
|
Berends AC, Mangnus MJJ, Xia C, Rabouw FT, de Mello Donega C. Optoelectronic Properties of Ternary I-III-VI 2 Semiconductor Nanocrystals: Bright Prospects with Elusive Origins. J Phys Chem Lett 2019; 10:1600-1616. [PMID: 30883139 PMCID: PMC6452418 DOI: 10.1021/acs.jpclett.8b03653] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Colloidal nanocrystals of ternary I-III-VI2 semiconductors are emerging as promising alternatives to Cd- and Pb-chalcogenide nanocrystals because of their inherently lower toxicity, while still offering widely tunable photoluminescence. These properties make them promising materials for a variety of applications. However, the realization of their full potential has been hindered by both their underdeveloped synthesis and the poor understanding of their optoelectronic properties, whose origins are still under intense debate. In this Perspective, we provide novel insights on the latter aspect by critically discussing the accumulated body of knowledge on I-III-VI2 nanocrystals. From our analysis, we conclude that the luminescence in these nanomaterials most likely originates from the radiative recombination of a delocalized conduction band electron with a hole localized at the group-I cation, which results in broad bandwidths, large Stokes shifts, and long exciton lifetimes. Finally, we highlight the remaining open questions and propose experiments to address them.
Collapse
|
40
|
van Oversteeg CM, Oropeza FE, Hofmann JP, Hensen EJM, de Jongh PE, de Mello Donega C. Water-Dispersible Copper Sulfide Nanocrystals via Ligand Exchange of 1-Dodecanethiol. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2019; 31:541-552. [PMID: 30686859 PMCID: PMC6345102 DOI: 10.1021/acs.chemmater.8b04614] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 12/18/2018] [Indexed: 05/16/2023]
Abstract
In colloidal Cu2-x S nanocrystal synthesis, thiols are often used as organic ligands and the sulfur source, as they yield high-quality nanocrystals. However, thiol ligands on Cu2-x S nanocrystals are difficult to exchange, limiting the applications of these nanocrystals in photovoltaics, biomedical sensing, and photocatalysis. Here, we present an effective and facile procedure to exchange native 1-dodecanethiol on Cu2-x S nanocrystals by 3-mercaptopropionate, 11-mercaptoundecanoate, and S2- in formamide under inert atmosphere. The product hydrophilic Cu2-x S nanocrystals have excellent colloidal stability in formamide. Furthermore, the size, shape, and optical properties of the nanocrystals are not significantly affected by the ligand exchange. Water-dispersible Cu2-x S nanocrystals are easily obtained by precipitation of the nanocrystals capped by S2-, 3-mercaptopropionate, or 11-mercaptoundecanoate from formamide, followed by redispersion in water. Interestingly, the ligand exchange rates for Cu2-x S nanocrystals capped with 1-dodecanethiol are observed to depend on the preparation method, being much slower for Cu2-x S nanocrystals prepared through heating-up than through hot-injection synthesis protocols. XPS studies reveal that the differences in the ligand exchange rates are due to the surface chemistry of the Cu2-x S nanocrystals, where the nanocrystals prepared via hot-injection synthesis have a less dense ligand layer due to the presence of trioctylphosphine oxide during synthesis. A model is proposed that explains the observed differences in the ligand exchange rates. The facile ligand exchange procedures reported here enable the use of high-quality colloidal Cu2-x S nanocrystals prepared in the presence of 1-dodecanethiol in various applications.
Collapse
Affiliation(s)
- Christina
H. M. van Oversteeg
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Freddy E. Oropeza
- Laboratory
of Inorganic Materials Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, Postbox 513, 5600 MB Eindhoven, The Netherlands
| | - Jan P. Hofmann
- Laboratory
of Inorganic Materials Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, Postbox 513, 5600 MB Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Laboratory
of Inorganic Materials Chemistry, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, Postbox 513, 5600 MB Eindhoven, The Netherlands
| | - Petra E. de Jongh
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Celso de Mello Donega
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- (Celso de Mello Donega) E-mail:
| |
Collapse
|
41
|
Bai X, Purcell-Milton F, Gun'ko YK. Optical Properties, Synthesis, and Potential Applications of Cu-Based Ternary or Quaternary Anisotropic Quantum Dots, Polytypic Nanocrystals, and Core/Shell Heterostructures. NANOMATERIALS 2019; 9:nano9010085. [PMID: 30634642 PMCID: PMC6359286 DOI: 10.3390/nano9010085] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 12/28/2018] [Accepted: 12/31/2018] [Indexed: 12/29/2022]
Abstract
This review summaries the optical properties, recent progress in synthesis, and a range of applications of luminescent Cu-based ternary or quaternary quantum dots (QDs). We first present the unique optical properties of the Cu-based multicomponent QDs, regarding their emission mechanism, high photoluminescent quantum yields (PLQYs), size-dependent bandgap, composition-dependent bandgap, broad emission range, large Stokes’ shift, and long photoluminescent (PL) lifetimes. Huge progress has taken place in this area over the past years, via detailed experimenting and modelling, giving a much more complete understanding of these nanomaterials and enabling the means to control and therefore take full advantage of their important properties. We then fully explore the techniques to prepare the various types of Cu-based ternary or quaternary QDs (including anisotropic nanocrystals (NCs), polytypic NCs, and spherical, nanorod and tetrapod core/shell heterostructures) are introduced in subsequent sections. To date, various strategies have been employed to understand and control the QDs distinct and new morphologies, with the recent development of Cu-based nanorod and tetrapod structure synthesis highlighted. Next, we summarize a series of applications of these luminescent Cu-based anisotropic and core/shell heterostructures, covering luminescent solar concentrators (LSCs), bioimaging and light emitting diodes (LEDs). Finally, we provide perspectives on the overall current status, challenges, and future directions in this field. The confluence of advances in the synthesis, properties, and applications of these Cu-based QDs presents an important opportunity to a wide-range of fields and this piece gives the reader the knowledge to grasp these exciting developments.
Collapse
Affiliation(s)
- Xue Bai
- School of Chemistry and CRANN Institute, Trinity College Dublin, Dublin 2, Dublin, Ireland.
| | - Finn Purcell-Milton
- School of Chemistry and CRANN Institute, Trinity College Dublin, Dublin 2, Dublin, Ireland.
| | - Yuri K Gun'ko
- School of Chemistry and CRANN Institute, Trinity College Dublin, Dublin 2, Dublin, Ireland.
| |
Collapse
|
42
|
Liu M, Liu Y, Gu B, Wei X, Xu G, Wang X, Swihart MT, Yong KT. Recent advances in copper sulphide-based nanoheterostructures. Chem Soc Rev 2019; 48:4950-4965. [DOI: 10.1039/c8cs00832a] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This tutorial summarizes and integrates recent advances in design and synthesis of copper sulfide-based nanoheterostructures and their applications in energy and healthcare.
Collapse
Affiliation(s)
- Maixian Liu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen
- China
| | - Yang Liu
- Department of Chemical and Biological Engineering
- University at Buffalo
- The State University of New York
- Buffalo
- USA
| | - Bobo Gu
- Med-X Research Institute and Department of Biomedical Engineering
- Shanghai Jiao Tong University
- Shanghai 200030
- China
| | - Xunbin Wei
- Med-X Research Institute and Department of Biomedical Engineering
- Shanghai Jiao Tong University
- Shanghai 200030
- China
| | - Gaixia Xu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province
- College of Optoelectronic Engineering
- Shenzhen University
- Shenzhen
- China
| | - Xiaomei Wang
- Department of Physiology
- School of Basic Medical Sciences
- Shenzhen University
- Shenzhen
- China
| | - Mark T. Swihart
- Department of Chemical and Biological Engineering
- University at Buffalo
- The State University of New York
- Buffalo
- USA
| | - Ken-Tye Yong
- School of Electrical and Electronic Engineering
- College of Engineering
- Nanyang Technological University
- Singapore
| |
Collapse
|
43
|
Kameyama T, Kishi M, Miyamae C, Sharma DK, Hirata S, Yamamoto T, Uematsu T, Vacha M, Kuwabata S, Torimoto T. Wavelength-Tunable Band-Edge Photoluminescence of Nonstoichiometric Ag-In-S Nanoparticles via Ga 3+ Doping. ACS APPLIED MATERIALS & INTERFACES 2018; 10:42844-42855. [PMID: 30508368 DOI: 10.1021/acsami.8b15222] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The nonstoichiometry of I-III-VI semiconductor nanoparticles, especially the ratio of group I to group III elements, has been utilized to control their physicochemical properties. We report the solution-phase synthesis of nonstoichiometric Ag-In-S and Ag-In-Ga-S nanoparticles and results of the investigation of their photoluminescence (PL) properties in relation to their chemical compositions. While stoichiometric AgInS2 nanoparticles simply exhibited only a broad PL band originating from defect sites in the particles, a narrow band edge PL peak newly appeared with a decrease in the Ag fraction in the nonstoichiometric Ag-In-S nanoparticles. The relative PL intensity of this band edge emission with respect to the defect-site emission was optimal at a Ag/(Ag + In) value of ca. 0.4. The peak wavelength of the band edge emission was tunable from 610 to 500 nm by increased doping with Ga3+ into Ag-In-S nanoparticles due to an increase of the energy gap. Furthermore, surface coating of Ga3+-doped Ag-In-S nanoparticles, that is, Ag-In-Ga-S nanoparticles, with a GaS x shell drastically and selectively suppressed the broad defect-site PL peak and, at the same time, led to an increase in the PL quantum yield (QY) of the band edge emission peak. The optimal PL QY was 28% for Ag-In-Ga-S@GaS x core-shell particles, with green band-edge emission at 530 nm and a full width at half-maximum of 181 meV (41 nm). The observed wavelength tunability of the band-edge PL peak will facilitate possible use of these toxic-element-free I-III-VI-based nanoparticles in a wide area of applications.
Collapse
Affiliation(s)
- Tatsuya Kameyama
- Graduate School of Engineering , Nagoya University , Chikusa-ku, Nagoya 464-8603 , Japan
| | - Marino Kishi
- Graduate School of Engineering , Nagoya University , Chikusa-ku, Nagoya 464-8603 , Japan
| | - Chie Miyamae
- Graduate School of Engineering , Nagoya University , Chikusa-ku, Nagoya 464-8603 , Japan
| | - Dharmendar Kumar Sharma
- Department of Materials Science and Engineering , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro, Tokyo 152-8552 , Japan
| | - Shuzo Hirata
- Department of Materials Science and Engineering , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro, Tokyo 152-8552 , Japan
| | - Takahisa Yamamoto
- Graduate School of Engineering , Nagoya University , Chikusa-ku, Nagoya 464-8603 , Japan
| | - Taro Uematsu
- Graduate School of Engineering , Osaka University , 2-1 Yamada-oka , Suita , Osaka 565-0871 , Japan
| | - Martin Vacha
- Department of Materials Science and Engineering , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro, Tokyo 152-8552 , Japan
| | - Susumu Kuwabata
- Graduate School of Engineering , Osaka University , 2-1 Yamada-oka , Suita , Osaka 565-0871 , Japan
| | - Tsukasa Torimoto
- Graduate School of Engineering , Nagoya University , Chikusa-ku, Nagoya 464-8603 , Japan
| |
Collapse
|
44
|
van der Stam W, de Graaf M, Gudjonsdottir S, Geuchies JJ, Dijkema JJ, Kirkwood N, Evers WH, Longo A, Houtepen AJ. Tuning and Probing the Distribution of Cu + and Cu 2+ Trap States Responsible for Broad-Band Photoluminescence in CuInS 2 Nanocrystals. ACS NANO 2018; 12:11244-11253. [PMID: 30372029 PMCID: PMC6262458 DOI: 10.1021/acsnano.8b05843] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The processes that govern radiative recombination in ternary CuInS2 (CIS) nanocrystals (NCs) have been heavily debated, but recently, several research groups have come to the same conclusion that a photoexcited electron recombines with a localized hole on a Cu-related trap state. Furthermore, it has been observed that single CIS NCs display narrower photoluminescence (PL) line widths than the ensemble, which led to the conclusion that within the ensemble there is a distribution of Cu-related trap states responsible for PL. In this work, we probe this trap-state distribution with in situ photoluminescence spectroelectrochemistry. We find that Cu2+ states result in individual "dark" nanocrystals, whereas Cu+ states result in "bright" NCs. Furthermore, we show that we can tune the PL position, intensity, and line width in a cyclic fashion by injecting or removing electrons from the trap-state distribution, thereby converting a subset of "dark" Cu2+ containing NCs into "bright" Cu+ containing NCs and vice versa. The electrochemical injection of electrons results in brightening, broadening, and a red shift of the PL, in line with the activation of a broad distribution of "dark" NCs (Cu2+ states) into "bright" NCs (Cu+ states) and a rise of the Fermi level within the ensemble trap-state distribution. The opposite trend is observed for electrochemical oxidation of Cu+ states into Cu2+. Our work shows that there is a direct correlation between the line width of the ensemble Cu+/Cu2+ trap-state distribution and the characteristic broad-band PL feature of CIS NCs and between Cu2+ cations in the photoexcited state (bright) and in the electrochemically oxidized ground state (dark).
Collapse
Affiliation(s)
- Ward van der Stam
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
- E-mail:
| | - Max de Graaf
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Solrun Gudjonsdottir
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Jaco J. Geuchies
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Jurgen J. Dijkema
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Nicholas Kirkwood
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Wiel H. Evers
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Alessandro Longo
- Netherlands
Organization for Scientific Research (NWO), Dutch-Belgian Beamline,
ESRF, The European Synchrotron, CS40220, 38043, 71 Avenue des Martyrs, 38000 Grenoble, France
- Istituto
per lo Studio dei Materiali Nanostrutturati (ISMN)-CNR, UOS Palermo, Via Ugo La Malfa, 153, 90146 Palermo, Italy
| | - Arjan J. Houtepen
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
- E-mail:
| |
Collapse
|
45
|
Xia C, Wu W, Yu T, Xie X, van Oversteeg C, Gerritsen HC, de Mello Donega C. Size-Dependent Band-Gap and Molar Absorption Coefficients of Colloidal CuInS 2 Quantum Dots. ACS NANO 2018; 12:8350-8361. [PMID: 30085648 PMCID: PMC6117745 DOI: 10.1021/acsnano.8b03641] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The knowledge of the quantum dot (QD) concentration in a colloidal suspension and the quantitative understanding of the size-dependence of the band gap of QDs are of crucial importance from both applied and fundamental viewpoints. In this work, we investigate the size-dependence of the optical properties of nearly spherical wurtzite (wz) CuInS2 (CIS) QDs in the 2.7 to 6.1 nm diameter range (polydispersity ≤10%). The QDs are synthesized by partial Cu+ for In3+ cation exchange in template Cu2- xS nanocrystals, which yields CIS QDs with very small composition variations (In/Cu = 0.91 ± 0.11), regardless of their sizes. These well-defined QDs are used to investigate the size-dependence of the band gap of wz CIS QDs. A sizing curve is also constructed for chalcopyrite CIS QDs by collecting and reanalyzing literature data. We observe that both sizing curves follow primarily a 1/ d dependence. Moreover, the molar absorption coefficients and the absorption cross-section per CIS formula unit, both at 3.1 eV and at the band gap, are analyzed. The results demonstrate that the molar absorption coefficients of CIS QDs follow a power law at the first exciton transition energy (ε E1 = 5208 d2.45) and scale with the QD volume at 3.1 eV. This latter observation implies that the absorption cross-section per unit cell at 3.1 eV is size-independent and therefore can be estimated from bulk optical constants. These results also demonstrate that the molar absorption coefficients at 3.1 eV are more reliable for analytical purposes, since they are less sensitive to size and shape dispersion.
Collapse
Affiliation(s)
- Chenghui Xia
- Condensed
Matter and Interfaces, Debye Institute for
Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- Molecular
Biophysics, Debye Institute for Nanomaterials
Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Weiwei Wu
- Condensed
Matter and Interfaces, Debye Institute for
Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Ting Yu
- Condensed
Matter and Interfaces, Debye Institute for
Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Xiaobin Xie
- Soft
Condensed Matter, Debye Institute for Nanomaterials
Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Christina van Oversteeg
- Condensed
Matter and Interfaces, Debye Institute for
Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Hans C. Gerritsen
- Molecular
Biophysics, Debye Institute for Nanomaterials
Science, Utrecht University, 3508 TA Utrecht, The Netherlands
| | - Celso de Mello Donega
- Condensed
Matter and Interfaces, Debye Institute for
Nanomaterials Science, Utrecht University, 3508 TA Utrecht, The Netherlands
- E-mail:
| |
Collapse
|
46
|
Xia C, Winckelmans N, Prins PT, Bals S, Gerritsen HC, de Mello Donegá C. Near-Infrared-Emitting CuInS 2/ZnS Dot-in-Rod Colloidal Heteronanorods by Seeded Growth. J Am Chem Soc 2018; 140:5755-5763. [PMID: 29569443 PMCID: PMC5934729 DOI: 10.1021/jacs.8b01412] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
![]()
Synthesis
protocols for anisotropic CuInX2 (X = S, Se,
Te)-based heteronanocrystals (HNCs) are scarce due to the difficulty
in balancing the reactivities of multiple precursors and the high
solid-state diffusion rates of the cations involved in the CuInX2 lattice. In this work, we report a multistep seeded growth
synthesis protocol that yields colloidal wurtzite CuInS2/ZnS dot core/rod shell HNCs with photoluminescence in the NIR (∼800
nm). The wurtzite CuInS2 NCs used as seeds are obtained
by topotactic partial Cu+ for In3+ cation exchange
in template Cu2–xS NCs. The seed
NCs are injected in a hot solution of zinc oleate and hexadecylamine
in octadecene, 20 s after the injection of sulfur in octadecene. This
results in heteroepitaxial growth of wurtzite ZnS primarily on the
Sulfur-terminated polar facet of the CuInS2 seed NCs, the
other facets being overcoated only by a thin (∼1 monolayer)
shell. The fast (∼21 nm/min) asymmetric axial growth of the
nanorod proceeds by addition of [ZnS] monomer units, so that the polarity
of the terminal (002) facet is preserved throughout the growth. The
delayed injection of the CuInS2 seed NCs is crucial to
allow the concentration of [ZnS] monomers to build up, thereby maximizing
the anisotropic heteroepitaxial growth rates while minimizing the
rates of competing processes (etching, cation exchange, alloying).
Nevertheless, a mild etching still occurred, likely prior to the onset
of heteroepitaxial overgrowth, shrinking the core size from 5.5 to
∼4 nm. The insights provided by this work open up new possibilities
in designing multifunctional Cu-chalcogenide based colloidal heteronanocrystals.
Collapse
Affiliation(s)
- Chenghui Xia
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science , Utrecht University , P.O. Box 80000 , 3508 TA Utrecht , The Netherlands.,Molecular Biophysics, Debye Institute for Nanomaterials Science , Utrecht University , 3508 TA Utrecht , The Netherlands
| | - Naomi Winckelmans
- EMAT-University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium
| | - P Tim Prins
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science , Utrecht University , P.O. Box 80000 , 3508 TA Utrecht , The Netherlands
| | - Sara Bals
- EMAT-University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium
| | - Hans C Gerritsen
- Molecular Biophysics, Debye Institute for Nanomaterials Science , Utrecht University , 3508 TA Utrecht , The Netherlands
| | - Celso de Mello Donegá
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science , Utrecht University , P.O. Box 80000 , 3508 TA Utrecht , The Netherlands
| |
Collapse
|
47
|
Enright MJ, Cossairt BM. Synthesis of tailor-made colloidal semiconductor heterostructures. Chem Commun (Camb) 2018; 54:7109-7122. [DOI: 10.1039/c8cc03498b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
This feature article provides an account of the various bottom-up and top-down methods that have been developed to prepare colloidal heterostructures and highlights the benefits of a seeded assembly approach for greater control and customizability.
Collapse
|