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Roshan H, Zhu D, Piccinotti D, Dai J, De Franco M, Barelli M, Prato M, De Trizio L, Manna L, Di Stasio F. Near Infrared Light-Emitting Diodes Based on Colloidal InAs/ZnSe Core/Thick-Shell Quantum Dots. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2400734. [PMID: 38622892 DOI: 10.1002/advs.202400734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/10/2024] [Indexed: 04/17/2024]
Abstract
Heavy-metal-free III-V colloidal quantum dots (QDs) exhibit promising attributes for application in optoelectronics. Among them, InAs QDs are demonstrating excellent optical performance with respect to absorption and emission in the near-infrared spectral domain. Recently, InAs QDs attained a substantial improvement in photoluminescence quantum yield, achieving 70% at a wavelength of 900 nm through the strategic overgrowth of a thick ZnSe shell atop the InAs core. In the present study, light-emitting diodes (LEDs) based on this type of InAs/ZnSe QDs are fabricated, reaching an external quantum efficiency (EQE) of 13.3%, a turn-on voltage of 1.5V, and a maximum radiance of 12 Wsr-1m-2. Importantly, the LEDs exhibit an extensive emission dynamic range, characterized by a nearly linear correlation between emission intensity and current density, which can be attributed to the efficient passivation provided by the thick ZnSe shell. The obtained results are comparable to state-of-the-art PbS QD LEDs. Furthermore, it should be stressed not only that the fabricated LEDs are fully RoHS-compliant but also that the emitting InAs QDs are prepared via a synthetic route based on a non-pyrophoric, cheap, and commercially available as precursor, namely tris(dimethylamino)-arsine.
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Affiliation(s)
- Hossein Roshan
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Dongxu Zhu
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Davide Piccinotti
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Jinfei Dai
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Manuela De Franco
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, Genova, 16146, Italy
| | - Matteo Barelli
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Mirko Prato
- Materials Characterization Facility, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Luca De Trizio
- Chemistry Facility, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Liberato Manna
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Francesco Di Stasio
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
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2
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Singh PDD, Murthy ZVP, Kailasa SK. Zinc nitride quantum dots as an efficient probe for simultaneous fluorescence detection of Cu 2+ and Mn 2+ ions in water samples. Mikrochim Acta 2024; 191:161. [PMID: 38411697 DOI: 10.1007/s00604-024-06247-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/04/2024] [Indexed: 02/28/2024]
Abstract
The exceptional ascending heights of graphene (carbon) and boron nitride nanostructures have invited scientists to explore metal nitride nanomaterials. Herein, Zn3N2 quantum dots (QDs) were prepared via a simple hydrothermal route from the reaction between zinc nitrate hexahydrate and ammonia solution that possess efficient strength towards sensing applications of metal ions (Cu2+ and Mn2+). The as-prepared Zn3N2 QDs show bright fluorescence, displaying an emission peak at 408 nm upon excitation at 320 nm, with a quantum yield (QY) of 29.56%. It was noticed that the fluorescence intensity of Zn3N2 QDs linearly decreases with the independent addition of Cu2+ and Mn2+ ions, displaying good linearity in the ranges 2.5-50 µM and 0.05-5 µM with detection limits of 21.77 nM and of 63.82 nM for Cu2+ and Mn2+ ions, respectively. The probe was successfully tested for quantifying Cu2+ and Mn2+ in real samples including river, canal, and tap water, providing good recoveries with a relative standard deviation < 2%. Furthermore, the masking proposition can successfully eliminate the interference if the two metal ions exist together. It was found that thiourea is efficiently able to mask Cu2+ and selectively quenches Mn2+, and L-cysteine is able to halt the quenching potential of Mn2+ and is selectively able to sense Cu2+. The Zn3N2 QDs provide a simple way for the simultaneous detection of both Cu2+ and Mn2+ ions in environmental samples at low sample preparations requirements.
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Affiliation(s)
- Pooja Dharni Dhar Singh
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India
| | - Z V P Murthy
- Department of Chemical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India
| | - Suresh Kumar Kailasa
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, 395007, Gujarat, India.
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3
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Bera S, Sahu P, Dutta A, Nobile C, Pradhan N, Cozzoli PD. Partial Chemicalization of Nanoscale Metals: An Intra-Material Transformative Approach for the Synthesis of Functional Colloidal Metal-Semiconductor Nanoheterostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2305985. [PMID: 37724799 DOI: 10.1002/adma.202305985] [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: 06/20/2023] [Revised: 09/09/2023] [Indexed: 09/21/2023]
Abstract
Heterostructuring colloidal nanocrystals into multicomponent modular constructs, where domains of distinct metal and semiconductor phases are interconnected through bonding interfaces, is a consolidated approach to advanced breeds of solution-processable hybrid nanomaterials capable of expressing richly tunable and even entirely novel physical-chemical properties and functionalities. To meet the challenges posed by the wet-chemical synthesis of metal-semiconductor nanoheterostructures and to overcome some intrinsic limitations of available protocols, innovative transformative routes, based on the paradigm of partial chemicalization, have recently been devised within the framework of the standard seeded-growth scheme. These techniques involve regiospecific replacement reactions on preformed nanocrystal substrates, thus holding great synthetic potential for programmable configurational diversification. This review article illustrates achievements so far made in the elaboration of metal-semiconductor nanoheterostructures with tailored arrangements of their component modules by means of conversion pathways that leverage on spatially controlled partial chemicalization of mono- and bi-metallic seeds. The advantages and limitations of these approaches are discussed within the context of the most plausible mechanisms underlying the evolution of the nanoheterostructures in liquid media. Representative physical-chemical properties and applications of chemicalization-derived metal-semiconductor nanoheterostructures are emphasized. Finally, prospects for developments in the field are outlined.
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Affiliation(s)
- Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - Puspanjali Sahu
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - Anirban Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - Concetta Nobile
- CNR NANOTEC - Institute of Nanotechnology, UOS di Lecce, Lecce, 73100, Italy
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Sciences (IACS), Kolkata, 700032, India
| | - P Davide Cozzoli
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Lecce, 73100, Italy
- UdR INSTM di Lecce, c/o Università del Salento, Lecce, 73100, Italy
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4
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Mi Y, Jiang A, Kong L, Wang J, Guo H, Luo SN. Amplified Spontaneous Emission and Lasing from Zn-Processed AgIn 5S 8 Core/Shell Quantum Dots. ACS APPLIED MATERIALS & INTERFACES 2023; 15:19330-19336. [PMID: 37018469 DOI: 10.1021/acsami.2c21648] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
I-III-VI ternary quantum dots (QDs) have emerged as favorable alternatives to the toxic II-VI QDs for optoelectronic and biological applications. However, their use as optical gain media for microlasers is still limited by a low fluorescence efficiency. Here, we demonstrate amplified spontaneous emission (ASE) and lasing from colloidal QDs of Zn-processed AgIn5S8 (AIS) for the first time. The passivation treatment on the AIS QDs yields a 3.4-fold enhancement of fluorescence quantum efficiency and a 30% increase in the two-photon absorption cross section. ASE is achieved from the AIS/ZnS core/shell QD films under both one- and two-photon pumping with a threshold fluence of ∼84.5 μJ/cm2 and 3.1 mJ/cm2, respectively. These thresholds are comparable to the best optical gain performance of Cd based-QDs reported in the literature. Moreover, we demonstrate a facile whispering-gallery-mode microlaser of the core/shell QDs with a lasing threshold of ∼233 μJ/cm2. The passivated AIS QDs can be promising optical gain media for photonic applications.
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Affiliation(s)
- Yang Mi
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Anqiang Jiang
- School of New Energy and Materials, State Key Laboratory of Oil and Gas Reservoir and Exploitation, Southwest Petroleum University, Chengdu 610500, People's Republic of China
| | - Lei Kong
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Jun Wang
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
| | - Heng Guo
- School of New Energy and Materials, State Key Laboratory of Oil and Gas Reservoir and Exploitation, Southwest Petroleum University, Chengdu 610500, People's Republic of China
| | - Sheng-Nian Luo
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
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Ghosh S, Kumar J, Nim GK, Bag M, Kar P. Air stable highly luminescent 2D tin halide perovskite nanocrystals as photodetectors. Chem Commun (Camb) 2023; 59:2110-2113. [PMID: 36723262 DOI: 10.1039/d3cc00097d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Hybrid and inorganic perovskite nanocrystals are a hot topic in materials chemistry due to their versatile optoelectronic properties. Herein, we report highly luminescent water stable lead-free orange emissive (OleylAm)2SnBr4 (OleylAm = oleylammonium cation) 2D tin halide perovskite nanocrystals in humid conditions in a solution-based process. The photoresponse study performed with the synthesized nanocrystals exhibits a responsivity of 4.9 mA W-1 at a 5 V operating voltage.
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Affiliation(s)
- Sukanya Ghosh
- Department of Chemistry, Indian Institute of Technology Roorkee, Uttarakhand-247667, India.
| | - Jitendra Kumar
- Department of Physics, Indian Institute of Technology Roorkee, Uttarakhand-247667, India
| | - Gaurav Kumar Nim
- Department of Chemistry, Indian Institute of Technology Roorkee, Uttarakhand-247667, India.
| | - Monojit Bag
- Department of Physics, Indian Institute of Technology Roorkee, Uttarakhand-247667, India
| | - Prasenjit Kar
- Department of Chemistry, Indian Institute of Technology Roorkee, Uttarakhand-247667, India.
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6
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Bahmani Jalali H, De Trizio L, Manna L, Di Stasio F. Indium arsenide quantum dots: an alternative to lead-based infrared emitting nanomaterials. Chem Soc Rev 2022; 51:9861-9881. [PMID: 36408788 PMCID: PMC9743785 DOI: 10.1039/d2cs00490a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Indexed: 11/22/2022]
Abstract
Colloidal quantum dots (QDs) emitting in the infrared (IR) are promising building blocks for numerous photonic, optoelectronic and biomedical applications owing to their low-cost solution-processability and tunable emission. Among them, lead- and mercury-based QDs are currently the most developed materials. Yet, due to toxicity issues, the scientific community is focusing on safer alternatives. In this regard, indium arsenide (InAs) QDs are one of the best candidates as they can absorb and emit light in the whole near infrared spectral range and they are RoHS-compliant, with recent trends suggesting that there is a renewed interest in this class of materials. This review focuses on colloidal InAs QDs and aims to provide an up-to-date overview spanning from their synthesis and surface chemistry to post-synthesis modifications. We provide a comprehensive overview from initial synthetic methods to the most recent developments on the ability to control the size, size distribution, electronic properties and carrier dynamics. Then, we describe doping and alloying strategies applied to InAs QDs as well as InAs based heterostructures. Furthermore, we present the state-of-the-art applications of InAs QDs, with a particular focus on bioimaging and field effect transistors. Finally, we discuss open challenges and future perspectives.
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Affiliation(s)
- Houman Bahmani Jalali
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Luca De Trizio
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Francesco Di Stasio
- Photonic Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
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Ham KM, Kim M, Bock S, Kim J, Kim W, Jung HS, An J, Song H, Kim JW, Kim HM, Rho WY, Lee SH, Park SM, Kim DE, Jun BH. Highly Bright Silica-Coated InP/ZnS Quantum Dot-Embedded Silica Nanoparticles as Biocompatible Nanoprobes. Int J Mol Sci 2022; 23:ijms231810977. [PMID: 36142888 PMCID: PMC9502493 DOI: 10.3390/ijms231810977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 11/24/2022] Open
Abstract
Quantum dots (QDs) have outstanding optical properties such as strong fluorescence, excellent photostability, broad absorption spectra, and narrow emission bands, which make them useful for bioimaging. However, cadmium (Cd)-based QDs, which have been widely studied, have potential toxicity problems. Cd-free QDs have also been studied, but their weak photoluminescence (PL) intensity makes their practical use in bioimaging challenging. In this study, Cd-free QD nanoprobes for bioimaging were fabricated by densely embedding multiple indium phosphide/zinc sulfide (InP/ZnS) QDs onto silica templates and coating them with a silica shell. The fabricated silica-coated InP/ZnS QD-embedded silica nanoparticles (SiO2@InP QDs@SiO2 NPs) exhibited hydrophilic properties because of the surface silica shell. The quantum yield (QY), maximum emission peak wavelength, and full-width half-maximum (FWHM) of the final fabricated SiO2@InP QDs@SiO2 NPs were 6.61%, 527.01 nm, and 44.62 nm, respectively. Moreover, the brightness of the particles could be easily controlled by adjusting the amount of InP/ZnS QDs in the SiO2@InP QDs@SiO2 NPs. When SiO2@InP QDs@SiO2 NPs were administered to tumor syngeneic mice, the fluorescence signal was prominently detected in the tumor because of the preferential distribution of the SiO2@InP QDs@SiO2 NPs, demonstrating their applicability in bioimaging with NPs. Thus, SiO2@InP QDs@SiO2 NPs have the potential to successfully replace Cd-based QDs as highly bright and biocompatible fluorescent nanoprobes.
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Affiliation(s)
- Kyeong-Min Ham
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Minhee Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Sungje Bock
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Jaehi Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Wooyeon Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | | | - Jaehyun An
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
- Company of BioSquare, Hwaseong 18449, Korea
| | | | | | - Hyung-Mo Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
- AI-Superconvergence KIURI Translational Research Center, Ajou University School of Medicine, Suwon 16499, Korea
| | - Won-Yeop Rho
- School of International Engineering and Science, Jeonbuk National University, Jeonju 54896, Korea
| | - Sang Hun Lee
- Department of Chemical and Biological Engineering, Hanbat University, Daejeon 34158, Korea
| | - Seung-min Park
- Department of Urology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Dong-Eun Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
- Correspondence: (D.-E.K.); (B.-H.J.)
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
- Correspondence: (D.-E.K.); (B.-H.J.)
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Tao L, Sun M, Zhou Y, Luo M, Lv F, Li M, Zhang Q, Gu L, Huang B, Guo S. A General Synthetic Method for High-Entropy Alloy Subnanometer Ribbons. J Am Chem Soc 2022; 144:10582-10590. [PMID: 35652187 DOI: 10.1021/jacs.2c03544] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
High-entropy alloys (HEAs) are attracting intensive attention due to their broad compositional tunability and interesting catalytic properties. However, precisely shaping the HEAs into suprathin low-dimensional nanostructures for achieving diverse applications remains an enormous challenge owing to their intrinsic thermodynamic instability. Herein we propose a new and general low-temperature method for incorporating up to eight metallic elements into one single-phase subnanometer ribbon to achieve the thinnest HEA metal materials in the world. We experimentally demonstrate that synthetic processes for suprathin HEA subnanometer ribbons (SNRs) include (1) different metal atom nucleation via galvanic exchange reaction between different metal precursors and Ag nanowire template, (2) co-reduction of different metal precursors on nanowire template, and (3) the removal of the inner Ag core. Density functional theory (DFT) calculations reveal that the crystallization and stabilization of HEA SNRs strongly depend on the "highly dynamic" Ag from the template, and the crystallization levels of HEA subnanometer ribbons are closely correlated with the concentration of Pt and Pd. We demonstrate that the present synthetic method enables the flexible control of components and concentrations in HEAs SNRs for achieving a library of HEA SNRs and also superior electrocatalytic properties. The well-designed HEA SNRs show great improvement in catalyzing the oxygen reduction reaction of fuel cells and also high discharge capacity, low charge overpotential, and excellent durability for Li-O2 batteries. DFT calculations reveal the superior electrochemical performances are attributed to the strong reduction capability from high-concentration reductive elements in HEAs, while the other elements guarantee the site-to-site efficient electron transfer.
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Affiliation(s)
- Lu Tao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Mingzi Sun
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR China
| | - Yin Zhou
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Mingchuan Luo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Fan Lv
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Menggang Li
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Bolong Huang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR China
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
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9
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Sekar S, Lee S. Derivation of Luminescent Mesoporous Silicon Nanocrystals from Biomass Rice Husks by Facile Magnesiothermic Reduction. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:613. [PMID: 33804437 PMCID: PMC7999164 DOI: 10.3390/nano11030613] [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: 12/31/2020] [Revised: 02/18/2021] [Accepted: 02/22/2021] [Indexed: 01/04/2023]
Abstract
High-quality silicon (Si) nanocrystals that simultaneously had superior mesoporous and luminescent characteristics were derived from sticky, red, and brown rice husks via the facile and cost-effective magnesiothermic reduction method. The Si nanocrystals were confirmed to comprise an aggregated morphology with spherical nanocrystals (e.g., average sizes of 15-50 nm). Due to the surface functional groups formed at the nanocrystalline Si surfaces, the Si nanocrystals clearly exhibited multiple luminescence peaks in visible-wavelength regions (i.e., blue, green, and yellow light). Among the synthesized Si nanocrystals, additionally, the brown rice husk (BRH)-derived Si nanocrystals showed to have a strong UV absorption and a high porosity (i.e., large specific surface area: 265.6 m2/g, small average pore diameter: 1.91 nm, and large total pore volume: 0.5389 cm3/g). These are indicative of the excellent optical and textural characteristics of the BRH-derived Si nanocrystals, compared to previously reported biomass-derived Si nanocrystals. The results suggest that the biomass BRH-derived Si nanocrystals hold great potential as an active source material for optoelectronic devices as well as a highly efficient catalyst or photocatalyst for energy conversion devices.
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Affiliation(s)
- Sankar Sekar
- Division of Physics & Semiconductor Science, Dongguk University-Seoul, Seoul 04620, Korea;
- Quantum-Functional Semiconductor Research Center, Dongguk University-Seoul, Seoul 04620, Korea
| | - Sejoon Lee
- Division of Physics & Semiconductor Science, Dongguk University-Seoul, Seoul 04620, Korea;
- Quantum-Functional Semiconductor Research Center, Dongguk University-Seoul, Seoul 04620, Korea
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10
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Steiner AM, Lissel F, Fery A, Lauth J, Scheele M. Perspektiven gekoppelter organisch‐anorganischer Nanostrukturen für Ladungs‐ und Energietransferanwendungen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.201916402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anja Maria Steiner
- Institut Physikalische Chemie und Physik der Polymere Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
| | - Franziska Lissel
- Institut Makromolekulare Chemie Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
- Technische Universität Dresden Mommsenstr. 4 01064 Dresden Deutschland
| | - Andreas Fery
- Institut Physikalische Chemie und Physik der Polymere Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
- Technische Universität Dresden Mommsenstr. 4 01064 Dresden Deutschland
| | - Jannika Lauth
- Leibniz-Universität Hannover Institut für Physikalische Chemie und Elektrochemie Callinstr. 3A 30167 Hannover Deutschland
| | - Marcus Scheele
- Eberhard-Karls-Universität Tübingen Institut für Physikalische und Theoretische Chemie Auf der Morgenstelle 18 72076 Tübingen Deutschland
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11
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Steiner AM, Lissel F, Fery A, Lauth J, Scheele M. Prospects of Coupled Organic-Inorganic Nanostructures for Charge and Energy Transfer Applications. Angew Chem Int Ed Engl 2021; 60:1152-1175. [PMID: 32173981 PMCID: PMC7821299 DOI: 10.1002/anie.201916402] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Indexed: 12/20/2022]
Abstract
We review the field of organic-inorganic nanocomposites with a focus on materials that exhibit a significant degree of electronic coupling across the hybrid interface. These nanocomposites undergo a variety of charge and energy transfer processes, enabling optoelectronic applications in devices which exploit singlet fission, triplet energy harvesting, photon upconversion or hot charge carrier transfer. We discuss the physical chemistry of the most common organic and inorganic components. Based on those we derive synthesis and assembly strategies and design criteria on material and device level with a focus on photovoltaics, spin memories or optical upconverters. We conclude that future research in the field should be directed towards an improved understanding of the binding motif and molecular orientation at the hybrid interface.
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Affiliation(s)
- Anja Maria Steiner
- Institute for Physical Chemistry and Polymer PhysicsLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
| | - Franziska Lissel
- Institute of Macromolecular ChemistryLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
- Technische Universität DresdenMommsenstr. 401064DresdenGermany
| | - Andreas Fery
- Institute for Physical Chemistry and Polymer PhysicsLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
- Technische Universität DresdenMommsenstr. 401064DresdenGermany
| | - Jannika Lauth
- Leibniz Universität HannoverInstitute of Physical Chemistry and ElectrochemistryCallinstr. 3A30167HannoverGermany
| | - Marcus Scheele
- Eberhard Karls-Universität TübingenInstitute of Physical and Theoretical ChemistryAuf der Morgenstelle 1872076TübingenGermany
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12
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Strategy for Encapsulation of CdS Quantum Dots into Zeolitic Imidazole Frameworks for Photocatalytic Activity. NANOMATERIALS 2020; 10:nano10122498. [PMID: 33322795 PMCID: PMC7764424 DOI: 10.3390/nano10122498] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/02/2020] [Accepted: 12/11/2020] [Indexed: 01/30/2023]
Abstract
Encapsulating CdS quantum dots (QDs) into zeolitic imidazole framework-8 (ZIF-8) can offer several advantages for photocatalysis. Various types of capping agents have been used to encapsulate QDs into ZIF-8 nanopores. An effective method for encapsulating CdS QDs into ZIF-8 is to use 2-mercaptoimidazole as the capping agent. This is because 2-mercaptoimidazole is similar to the imidazolate ligands of ZIFs and can used for capping active species with simultaneous encapsulation during the crystal growth of ZIF-8. Compared to other widely used capping agents such as polyvinylpyrrolidone (PVP), using 2-mercaptoimidazole for encapsulating CdS QDs into ZIF-8 revealed photocatalytic effects along with the molecular sieving effect when using differently sized molecular redox mediators such as methyl viologen (MV2+) and diquat (DQ2+).
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Zhang Z, Zhao R, Teng S, Huang K, Zhang L, Wang D, Yang W, Xie R, Pradhan N. Color Tunable Self-Trapped Emissions from Lead-Free All Inorganic IA-IB Bimetallic Halides Cs-Ag-X (X = Cl, Br, I). SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2004272. [PMID: 33025738 DOI: 10.1002/smll.202004272] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/26/2020] [Indexed: 06/11/2023]
Abstract
Multi-metallic halides of group IA and IB metals are emerged as a new class of color tunable emitters. While chalcogenides and perovskites are extensively studied, these families of materials are little explored. In comparison, herein, lead and cadmium free bimetallic Cs-Ag-X (X = Cl, Br, I) halides are reported where the larger ion Ag+ helped in incorporating all the halide ions which in turn tune their emission color in spanning from 397 nm (violet) to 820 nm (near infrared) as a function of their composition. The synthesis method adopted here is the solvent free ball milling of respective halides of Cs and Ag and took the record shortest time and in bulk scale. From decay lifetimes, emissions from these bimetallic halides are found as a result of fast recombination of self-trapped excitons, which exhibited not only reasonably high quantum yield in the range of 17-68% but also excellent stability to air and moisture under ambient conditions. These also show wide Stokes shift with relatively longer decay lifetimes ranging above the exciton and below the surface trap or dopant induced emissions of inorganic semiconductors, indicating a new class of materials having unique identity of their optical behaviors.
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Affiliation(s)
- Zixu Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Ruoting Zhao
- State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Automobile Materials of MOE, and College of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Shiyong Teng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Lijun Zhang
- State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Automobile Materials of MOE, and College of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Dayang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Wensheng Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Renguo Xie
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata, West Bengal, 700032, India
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14
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Calvin JJ, Swabeck JK, Sedlak AB, Kim Y, Jang E, Alivisatos AP. Thermodynamic Investigation of Increased Luminescence in Indium Phosphide Quantum Dots by Treatment with Metal Halide Salts. J Am Chem Soc 2020; 142:18897-18906. [PMID: 33095575 DOI: 10.1021/jacs.0c08954] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Increasing the quantum yields of InP quantum dots is important for their applications, particularly for use in consumer displays. While several methods exist to improve quantum yield, the addition of inorganic metal halide salts has proven promising. To further investigate this phenomenon, InP quantum dots dispersed in tetrahydrofuran were titrated with ZnCl2, ZnBr2, and InCl3. The optical properties were observed, and the reactions were studied by using quantitative 1H NMR and thermodynamic measurements from isothermal titration calorimetry. These measurements contradict the previously hypothesized reaction mechanism in which metal halide salts, acting as Z-type ligands, passivate undercoordinated anions on the surface of the quantum dots. This work provides evidence for a newly proposed mechanism wherein the metal halide salts undergo a ligand exchange with indium myristate. Thermodynamic measurements prove key to supporting this new mechanism, particularly in describing the organic ligand interactions on the surface. An Ising model was used to simulate the quantum dot surface and was fit by using thermodynamic and 1H NMR data. Together, these data and the proposed exchange mechanism provide greater insight into the surface chemistry of quantum dots.
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Affiliation(s)
- Jason J Calvin
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Joseph K Swabeck
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | - Yongwook Kim
- Inorganic Material Lab, Samsung Advanced Institute of Technology, Samsung Electronics, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
| | - Eunjoo Jang
- Inorganic Material Lab, Samsung Advanced Institute of Technology, Samsung Electronics, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16678, Republic of Korea
| | - A Paul Alivisatos
- Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Kavli Energy NanoScience Institute, Berkeley, California 94720, United States
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15
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Zhou M, Li C, Fang J. Noble-Metal Based Random Alloy and Intermetallic Nanocrystals: Syntheses and Applications. Chem Rev 2020; 121:736-795. [DOI: 10.1021/acs.chemrev.0c00436] [Citation(s) in RCA: 129] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ming Zhou
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Can Li
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
| | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
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16
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Chiang WH, Mariotti D, Sankaran RM, Eden JG, Ostrikov KK. Microplasmas for Advanced Materials and Devices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905508. [PMID: 31854023 DOI: 10.1002/adma.201905508] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 09/28/2019] [Indexed: 05/23/2023]
Abstract
Microplasmas are low-temperature plasmas that feature microscale dimensions and a unique high-energy-density and a nonequilibrium reactive environment, which makes them promising for the fabrication of advanced nanomaterials and devices for diverse applications. Here, recent microplasma applications are examined, spanning from high-throughput, printing-technology-compatible synthesis of nanocrystalline particles of common materials types, to water purification and optoelectronic devices. Microplasmas combined with gaseous and/or liquid media at low temperatures and atmospheric pressure open new ways to form advanced functional materials and devices. Specific examples include gas-phase, substrate-free, plasma-liquid, and surface-supported synthesis of metallic, semiconducting, metal oxide, and carbon-based nanomaterials. Representative applications of microplasmas of particular importance to materials science and technology include light sources for multipurpose, efficient VUV/UV light sources for photochemical materials processing and spectroscopic materials analysis, surface disinfection, water purification, active electromagnetic devices based on artificial microplasma optical materials, and other devices and systems including the plasma transistor. The current limitations and future opportunities for microplasma applications in materials related fields are highlighted.
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Affiliation(s)
- Wei-Hung Chiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan
| | - Davide Mariotti
- Nanotechnology & Integrated Bio-Engineering Centre (NIBEC), Ulster University, Shore Road, Newtownabbey, BT37 0QB, UK
| | - R Mohan Sankaran
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, OH, 44106-7217, USA
| | - J Gary Eden
- Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL, 61801, USA
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
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17
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Prabha S, Durgalakshmi D, Subramani K, Aruna P, Ganesan S. Enhanced Emission of Zinc Nitride Colloidal Nanoparticles with Organic Dyes for Optical Sensors and Imaging Application. ACS APPLIED MATERIALS & INTERFACES 2020; 12:19245-19257. [PMID: 32242405 DOI: 10.1021/acsami.9b21585] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Herein, we have reported on the efficiency of inorganic Zn3N2 nanoparticles for labeling plant cells and animal cells toward imaging applications with negligible toxicity. We have synthesized zinc nitride (Zn3N2) colloidal nanoparticles with an average size of 25 nm at room temperature. The optical band gap of the prepared Zn3N2 nanoparticles is 2.8 eV and gives a visible range emission at 415 nm. With the addition of Zn3N2 colloids to organic dyes such as protoporphyrin, flavin adenine dinucleotide, fluorescein, and neutral red, the emission intensity of the organic dyes enhanced from 3 to 20 times. The molecular simulation and lifetime studies evidence the possibility of energy transfer from zinc nitride to organic dyes. The enhancement of dye intensity in the presence of Zn3N2 enhanced the vicinity of the cellular environment during confocal imaging of plant cells and animal cells. The detailed results suggested Zn3N2 for bioimaging and biosensor applications.
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Affiliation(s)
| | | | - Karthikeyan Subramani
- Department of Organic Chemistry, Science Faculty, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya St.,6, Moscow 117198, Russia
| | - Prakasarao Aruna
- Department of Medical Physics, Anna University, Chennai 600025, India
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18
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Liu B, Li J, Duan G, Ji M, Lu Y, Yan T, Cao B, Liu Z. Study on organic-inorganic hybrid perovskite nanocrystals with regular morphologies and their effect on photoluminescence properties. OPTICS EXPRESS 2020; 28:10714-10724. [PMID: 32403596 DOI: 10.1364/oe.378203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 03/17/2020] [Indexed: 06/11/2023]
Abstract
Organic-inorganic hybrid perovskite nanocrystals have been widely studied for their excellent photoelectric properties. However, the irregular morphologies of organic-inorganic hybrid perovskite nanocrystals have limited application in the field of lighting and display. From this, the regular morphologies of nanospheres, nanorods, nanoplatelets and MAPbBr3 (MA = CH3NH3 +) nanocrystals have been synthesized by regulating the type and proportion of auxiliary ligands. The phase evolution, morphology and fluorescent properties were systematically studied by the various instruments of XRD, TEM, PL/UV-vis spectroscopy and fluorescence decay analysis. With the morphologies changing from nanospheres to nanoplatelets, the emission peaks of MAPbBr3 nanocrystals red-shifted, and the lifetimes have increased gradually. The underlying mechanisms were thoroughly investigated and elucidated. On this basis, the role of acid and amine in the synthesis of MAPbBr3 nanocrystals was systematically studied by regulating the ratio of oleic acid and N-octylamine. The fluorescence kinetics of MAPbBr3 nanocrystals were studied by femtosecond transient absorption spectroscopy, and the charge carrier relaxation mechanism was clarified. Furthermore, the effect of temperature on the fluorescence properties of the nanocrystal was investigated in detail. Organic-inorganic hybrid perovskite nanocrystals with morphologies-controlled and excellent fluorescence properties are expected to be widely used in lighting and display fields.
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19
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Kuriakose L, Simi NJ, Ison VV. CuZn 2InTe 4 quantum dots-a novel nanostructure employing a green synthesis route. RSC Adv 2020; 10:18560-18564. [PMID: 35518340 PMCID: PMC9053954 DOI: 10.1039/d0ra02980g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/04/2020] [Indexed: 01/12/2023] Open
Abstract
We report the synthesis and characterisation of novel CuZn2InTe4 quantum dots (QDs) suitable for various optoelectronic applications. The nanostructures grown are technologically important due to their Cd and Pb-free composition. The synthesis was maintained “green” by using a phosphine free organometallic procedure utilizing octadecene as the coordinating solvent. The structural properties of the nanocrystals (NCs) were analyzed using high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) and X-ray diffraction (XRD). The composition was verified using X-ray photoelectron spectroscopy (XPS), inductive coupled plasma-optical emission spectroscopy (ICP-OES) and energy dispersive X-ray spectroscopy (EDX). The optical studies were performed using UV-VIS-NIR spectroscopy and photoluminescence (PL) spectroscopy and the band gap value obtained was verified using cyclic voltammetry (CV). The nanostructures grown were spherical with a size of about 5 nm possessing appreciable monodispersity. On the synthesis of novel Cd and Pb free quaternary QDs using green synthesis.![]()
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Affiliation(s)
- Libin Kuriakose
- Centre for Nano Bio Polymer Science and Technology
- Department of Physics
- St. Thomas College
- Kottayam
- India
| | - N. J. Simi
- Centre for Nano Bio Polymer Science and Technology
- Department of Physics
- St. Thomas College
- Kottayam
- India
| | - V. V. Ison
- Centre for Nano Bio Polymer Science and Technology
- Department of Physics
- St. Thomas College
- Kottayam
- India
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20
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Mixed-Solvent Polarity-Assisted Phase Transition of Cesium Lead Halide Perovskite Nanocrystals with Improved Stability at Room Temperature. NANOMATERIALS 2019; 9:nano9111537. [PMID: 31671551 PMCID: PMC6915538 DOI: 10.3390/nano9111537] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/10/2019] [Accepted: 10/28/2019] [Indexed: 01/28/2023]
Abstract
Cesium lead halide perovskite nanocrystals (NCs) have attracted enormous interest in light-emitting diode, photodetector and low-threshold lasing application in terms of their unique optical and electrical performance. However, little attention has been paid to other structures associated with CsPbBr3, such as CsPb2Br5. Herein, we realize a facile method to prepare dual-phase NCs with improved stability against polar solvents by replacing conventional oleylamine with cetyltrimethyl ammonium bromide (CTAB) in the reprecipitation process. The growth of NCs can be regulated with different ratios of toluene and ethanol depending on solvent polarity, which not only obtains NCs with different sizes and morphologies, but also controls phase transition between orthorhombic CsPbBr3 and tetragonal CsPb2Br5. The photoluminescence (PL) and defect density calculated exhibit considerable solvent polarity dependence, which is ascribed to solvent polarity affecting the ability of CTAB to passivate surface defects and improve stoichiometry in the system. This new synthetic method of perovskite material will be helpful for further studies in the field of lighting and detectors.
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21
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Wang T, Guan X, Zhang H, Ji W. Exploring Electronic and Excitonic Processes toward Efficient Deep-Red CuInS 2/ZnS Quantum-Dot Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2019; 11:36925-36930. [PMID: 31524372 DOI: 10.1021/acsami.9b13108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The electroluminescence mechanisms in the Cd-free CuInS2/ZnS quantum dot-based light-emitting diodes (QLEDs) are systematically investigated through transient electroluminescence measurements. The results demonstrate that the characteristics of hole transporting layers (HTLs) determine the QLEDs to be activated by the direct charge injection or the energy transfer. Moreover, both the energy level alignment between the HTL and quantum dot and the carrier mobility properties of the HTLs are critical factors to affect the device performance. By choosing the suitable HTL, such as 4,4'-bis(9-carbazolyl)-2,2'-biphenyl, highly efficient deep-red (emission peak at ∼650 nm) CuInS2/ZnS QLEDs based on the single HTL can be obtained with a peak current efficiency and luminance of ∼2.0 cd/A and nearby 3000 cd/m2, respectively.
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Affiliation(s)
- Ting Wang
- Key Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics , Jilin University , Changchun 130012 , China
| | - Xin Guan
- Key Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics , Jilin University , Changchun 130012 , China
| | - Hanzhuang Zhang
- Key Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics , Jilin University , Changchun 130012 , China
| | - Wenyu Ji
- Key Lab of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics , Jilin University , Changchun 130012 , China
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22
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Zeng Q, Lafalce E, Lin CH, Smith MJ, Jung J, Yoon Y, Lin Z, Tsukruk VV, Vardeny ZV. Control of Whispering Gallery Modes and PT-Symmetry Breaking in Colloidal Quantum Dot Microdisk Lasers with Engineered Notches. NANO LETTERS 2019; 19:6049-6057. [PMID: 31373501 DOI: 10.1021/acs.nanolett.9b01914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Whispering gallery mode resonators have been demonstrated to be a great way to achieve superior optical cavities with high quality factor and small mode volume. However, due to the high sensitivity of these modes to the properties of the resonator boundary, they are susceptible to parasitic splitting of clockwise and counterclockwise modes. In this work, we investigate the effect of implantation of an engineered notch into the boundary of a circular microdisk resonator fabricated from colloidal quantum dots, which are particularly sensitive to boundary defects. We observed a strong reduction of parasitic mode splitting with introduction of a large engineered notch, as well as enhanced directionality of laser emission. We further investigate the performance of these resonators in evanescently coupled pairs, where the modal interaction allows modulation of laser behavior through variation of the gain and loss induced by the optical pump. We show that two distinct cases of modal interaction can be achieved by adjusting the size of the engineered notch, providing a bridge between intra- and interdisk modal interactions for laser spectral control.
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Affiliation(s)
- Qingji Zeng
- Department of Physics & Astronomy , University of Utah , Salt Lake City , Utah 84112 , United States
| | - Evan Lafalce
- Department of Physics & Astronomy , University of Utah , Salt Lake City , Utah 84112 , United States
| | - Chun Hao Lin
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia , 30332 , United States
| | - Marcus J Smith
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia , 30332 , United States
- Aerospace Systems Directorate , Air Force Research Laboratory, Wright-Patterson Air Force Base , Dayton , Ohio 45433 , United States
| | - Jaehan Jung
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia , 30332 , United States
| | - Young Yoon
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia , 30332 , United States
| | - Zhiqun Lin
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia , 30332 , United States
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia , 30332 , United States
| | - Z Valy Vardeny
- Department of Physics & Astronomy , University of Utah , Salt Lake City , Utah 84112 , United States
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23
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Anni M. Polymer-II-VI Nanocrystals Blends: Basic Physics and Device Applications to Lasers and LEDs. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1036. [PMID: 31331048 PMCID: PMC6669662 DOI: 10.3390/nano9071036] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/08/2019] [Accepted: 07/16/2019] [Indexed: 02/04/2023]
Abstract
Hybrid thin films that combine organic conjugated molecules and semiconductors nanocrystals (NCs) have been deeply investigated in the previous years, due to their capability to provide an extremely broad tuning of their electronic and optical properties. In this paper we review the main aspects of the basic physics of the organic-inorganic interaction and the actual state of the art of lasers and light emitting diodes based on hybrid active materials.
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Affiliation(s)
- Marco Anni
- Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento, Via per Arnesano, 73100 Lecce, Italy.
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24
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Chen D, Wang A, Buntine MA, Jia G. Recent Advances in Zinc‐Containing Colloidal Semiconductor Nanocrystals for Optoelectronic and Energy Conversion Applications. ChemElectroChem 2019. [DOI: 10.1002/celc.201900838] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Dechao Chen
- Curtin Institute of Functional Molecules and Interfaces School of Molecular and Life Sciences Curtin University WA-6845 Perth Australia
| | - Aixiang Wang
- School of Chemistry and Chemical Engineering Linyi University Linyi 276005 China
| | - Mark A. Buntine
- Curtin Institute of Functional Molecules and Interfaces School of Molecular and Life Sciences Curtin University WA-6845 Perth Australia
| | - Guohua Jia
- Curtin Institute of Functional Molecules and Interfaces School of Molecular and Life Sciences Curtin University WA-6845 Perth Australia
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25
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Hou B. Colloidal Quantum Dots: The Artificial Building Blocks for New‐Generation Photo‐Electronics and Photochemistry. Isr J Chem 2019. [DOI: 10.1002/ijch.201900069] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bo Hou
- Department of EngineeringUniversity of Cambridge 9 JJ Thomson Avenue Cambridge CB3 0FA United Kingdom
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26
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du Fossé I, ten Brinck S, Infante I, Houtepen AJ. Role of Surface Reduction in the Formation of Traps in n-Doped II-VI Semiconductor Nanocrystals: How to Charge without Reducing the Surface. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2019; 31:4575-4583. [PMID: 31274957 PMCID: PMC6595709 DOI: 10.1021/acs.chemmater.9b01395] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/25/2019] [Indexed: 05/19/2023]
Abstract
The efficiency of nanocrystal (NC)-based devices is often limited by the presence of surface states that lead to localized energy levels in the bandgap. Yet, a complete understanding of the nature of these traps remains challenging. Although theoretical modeling has greatly improved our comprehension of the NC surface, several experimental studies suggest the existence of metal-based traps that have not yet been found with theoretical methods. Since there are indications that these metal-based traps form in the presence of excess electrons, the present work uses density functional theory (DFT) calculations to study the effects of charging II-VI semiconductor NCs with either full or imperfect surface passivation. It is found that charge injection can lead to trap-formation via two pathways: metal atom ejection from perfectly passivated NCs or metal-metal dimer-formation in imperfectly passivated NCs. Fully passivated CdTe NCs are observed to be stable up to a charge of two electrons. Further reduction leads to charge localization on a surface Cd atom and the formation of in-gap states. The effects of suboptimal passivation are probed by charging NCs where an X-type ligand is removed from the (100) plane. In this case, injection of even one electron leads to Cd-dimerization and trap-formation. Addition of an L-type amine ligand prevents this dimer-formation and is suggested to also prevent trapping of photoexcited electrons in charge neutral NCs. The results presented in this work are generalized to NCs of different sizes and other II-VI semiconductors. This has clear implications for n-doping II-VI semiconductor NCs without introducing surface traps due to metal ion reduction. The possible effect of these metal ion localized traps on the photoluminescence efficiency of neutral NCs is also discussed.
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Affiliation(s)
- Indy du Fossé
- Optoelectronic
Materials Section, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Stephanie ten Brinck
- Department
of Theoretical Chemistry, Faculty of Science, Vrije Universiteit Amsterdam, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Ivan Infante
- Department
of Theoretical Chemistry, Faculty of Science, Vrije Universiteit Amsterdam, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- E-mail:
| | - 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:
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27
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Antolini F, Orazi L. Quantum Dots Synthesis Through Direct Laser Patterning: A Review. Front Chem 2019; 7:252. [PMID: 31058137 PMCID: PMC6478899 DOI: 10.3389/fchem.2019.00252] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 03/29/2019] [Indexed: 11/24/2022] Open
Abstract
In this brief review the advances on Direct Laser Patterning (DLP) for the synthesis of photo-luminescent semiconductor quantum dots (QDs) belonging to II-VI groups, especially in solid state using laser-assisted conversion are reported and commented. The chemistry of the precursor synthesis is illustrated because it is a crucial step for the development of the direct laser patterning of QDs. In particular, the analysis of cadmium (bis)thiolate and cadmium xanthates precursors after thermal and laser treatment is examined, with a special focus on the optical properties of the formed QDs. The second part of the review examines how the laser parameters such as the wavelength and pulse duration may regulate the properties of the patterned QDs. The DLP technique does not require complex laser systems or the use of dangerous chemical post treatments, so it can be introduced as a potential method for the patterning of pixels in quantum dot light emitting diodes (QD-LEDs) for display manufacturing.
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Affiliation(s)
- Francesco Antolini
- Photonics Micro and Nanostructures Laboratory, Physical Technologies for Safety and Health Division, Fusion and Technologies for Nuclear Safety and Security Department, ENEA, Frascati, Italy
| | - Leonardo Orazi
- Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Reggio Emilia, Italy
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Wang A, Guo Y, Zhou Z, Niu X, Wang Y, Muhammad F, Li H, Zhang T, Wang J, Nie S, Deng Z. Aqueous acid-based synthesis of lead-free tin halide perovskites with near-unity photoluminescence quantum efficiency. Chem Sci 2019; 10:4573-4579. [PMID: 31123567 PMCID: PMC6492635 DOI: 10.1039/c9sc00453j] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 03/05/2019] [Indexed: 02/05/2023] Open
Abstract
Recently, lead halide perovskites with outstanding emission performance have become new candidate materials for light-emitting devices and displays; however, the toxicity of lead and instability of halide perovskites remain significant challenges. Herein, we report the aqueous acid-based synthesis of highly emissive two-dimensional (2D) tin halide perovskites, (octylammonium)2SnX4 (X = Br, I, or mixtures thereof), which displayed a high absolute photoluminescence (PL) quantum yield of near-unity in the solid-state, PL emission centered at 600 nm with a broad bandwidth (136 nm), a large Stokes shift (250 nm), long-lived luminescence (τ = 3.3 μs), and zero overlap between their absorption and emission spectra. Significantly, the stability study of 2D tin halide perovskites monitored by the PL quantum yield showed no changes after 240 days of storage at room temperature under ambient air and humidity conditions. The PL emission of the 2D tin halide perovskites was tuned from yellow to deep red by controlling halide composition. Furthermore, new yellow phosphors with superior optical properties are used to fabricate UV pumped white light emitting diodes (WLEDs). We expect these results to facilitate the development of new environmentally friendly and high-performance phosphors for future lighting and display technologies.
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Affiliation(s)
- Aifei Wang
- College of Engineering and Applied Sciences , Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , P. R. China .
| | - Yanyan Guo
- College of Engineering and Applied Sciences , Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , P. R. China .
| | - Zhaobo Zhou
- School of Physics , Southeast University , Nanjing 211189 , P. R. China .
| | - Xianghong Niu
- School of Science , Nanjing University of Posts and Telecommunications , Nanjing 210046 , People's Republic of China
| | - Yonggang Wang
- Center for High Pressure Science and Technology Advanced Research (HPSTAR) , Beijing 100949 , P. R. China
| | - Faheem Muhammad
- College of Engineering and Applied Sciences , Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , P. R. China .
| | - Hongbo Li
- College of Materials Science and Engineering , Beijing Institute of Technology , Haidian District , Beijing 100081 , P. R. China
| | - Tao Zhang
- College of Engineering and Applied Sciences , Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , P. R. China .
| | - Jinlan Wang
- School of Physics , Southeast University , Nanjing 211189 , P. R. China .
| | - Shuming Nie
- College of Engineering and Applied Sciences , Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , P. R. China . .,Departments of Bioengineering, Chemistry, Electrical and Computer Engineering, and Materials Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , IL , USA .
| | - Zhengtao Deng
- College of Engineering and Applied Sciences , Nanjing National Laboratory of Microstructures , Nanjing University , Nanjing , Jiangsu 210093 , P. R. China .
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29
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Das S, Dutta A, Bera R, Patra A. Ultrafast carrier dynamics in 2D-2D hybrid structures of functionalized GO and CdSe nanoplatelets. Phys Chem Chem Phys 2019; 21:15568-15575. [PMID: 31265037 DOI: 10.1039/c9cp02823d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Considerable attention has been paid to designing graphene based 2D hybrid nanostructures for their potential applications in various areas from healthcare to energy harvesting. Herein, we have prepared 2D-2D hybrid structures of 2D CdSe nanoplatelets (NPLs) with thiol (-SH) functionalized reduced graphene oxide (G-Ph-SH). Microscopic and spectroscopic studies reveal that the G-Ph-SH surface is successfully decorated by CdSe NPLs through a thiophenol (-SH) linker. The significant photoluminescence quenching (65%) and the shortening of decay time from 1 ns to 0.4 ns of CdSe NPLs are observed after adding 100 μg of G-Ph-SH. Furthermore, the femto-second transient absorption spectroscopic (fs-TAS) study reveals that the growth time of CdSe NPLs in the composite is reduced to 0.4 ps from 0.8 ps due to faster hot electron cooling. A faster component of 1.4 ps in the kinetic parameters of the composite system further suggests that the ultrafast electron transfer occurs from the conduction band of CdSe NPLs to surface functionalized reduced graphene oxide. This type of 2D-2D hybrid structure may open up new possibilities in light harvesting applications.
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Affiliation(s)
- Soma Das
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Avisek Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Rajesh Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Amitava Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
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30
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Babu R, Singh SP. Solvent-Assisted Tuning of the Size and Shape of CsPbBr 3 Nanocrystals via Redispersion Process at Ambient Condition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:15507-15516. [PMID: 30472856 DOI: 10.1021/acs.langmuir.8b02477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
All-inorganic CsPbBr3 perovskite nanocrystals are emerging as a new class of semiconductors with outstanding optoelectronic properties and great potential for various applications, such as, lasing, photon detection, photovoltaics, etc. This article provides the effect of solvents on the reprecipitation of CsPbBr3 perovskite at room temperature. The results observed for CsPbBr3 perovskite in various antisolvents showed various cubes (nano- to microsized), self-assembly of nanocubes and nanorods. In addition, all of the various sizes (nano to micro) of cubes and self-assembly of nanocubes and shape-controlled nanorods exhibited band gap tuning at the green light region. The corresponding microscopy (field emission scanning electron microscopy and high-resolution transmission electron microscopy) images and photoluminescence quantum yield as well as lifetime decay are presented. To the best of our literature knowledge, this is the first report on various solvent-assisted studies on CsPbBr3 perovskite nanocrystals.
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Affiliation(s)
- Ramavath Babu
- Polymers and Functional Materials Division , CSIR-Indian Institute of Chemical Technology (IICT) , Uppal Road , Tarnaka, Hyderabad 500007 , India
| | - Surya Prakash Singh
- Polymers and Functional Materials Division , CSIR-Indian Institute of Chemical Technology (IICT) , Uppal Road , Tarnaka, Hyderabad 500007 , India
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31
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Chetty SS, Praneetha S, Vadivel Murugan A, Govarthanan K, Verma RS. Microwave‐Assisted Synthesis of Quasi‐Pyramidal CuInS
2
–ZnS Nanocrystals for Enhanced Near‐Infrared Targeted Fluorescent Imaging of Subcutaneous Melanoma. ACTA ACUST UNITED AC 2018; 3:e1800127. [DOI: 10.1002/adbi.201800127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 09/24/2018] [Indexed: 01/22/2023]
Affiliation(s)
- S. Shashank Chetty
- Advanced Functional Nanostructured Materials LaboratoryCentre for Nanoscience and TechnologyMadanjeet School of Green Energy TechnologiesPondicherry University (A Central University) Puducherry 605014 India
| | - S. Praneetha
- Advanced Functional Nanostructured Materials LaboratoryCentre for Nanoscience and TechnologyMadanjeet School of Green Energy TechnologiesPondicherry University (A Central University) Puducherry 605014 India
| | - A. Vadivel Murugan
- Advanced Functional Nanostructured Materials LaboratoryCentre for Nanoscience and TechnologyMadanjeet School of Green Energy TechnologiesPondicherry University (A Central University) Puducherry 605014 India
| | - Kavitha Govarthanan
- Stem Cell and Molecular Biology LaboratoryBhupat and Jyoti Mehta School of BiosciencesDepartment of BiotechnologyIndian Institute of Technology‐Madras (IIT‐M) Chennai 600036 India
| | - Rama S. Verma
- Stem Cell and Molecular Biology LaboratoryBhupat and Jyoti Mehta School of BiosciencesDepartment of BiotechnologyIndian Institute of Technology‐Madras (IIT‐M) Chennai 600036 India
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32
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Abstract
From a niche field over 30 years ago, quantum dots (QDs) have developed into viable materials for many commercial optoelectronic devices. We discuss the advancements in Pb-based QD solar cells (QDSCs) from a viewpoint of the pathways an excited state can take when relaxing back to the ground state. Systematically understanding the fundamental processes occurring in QDs has led to improvements in solar cell efficiency from ~3% to over 13% in 8 years. We compile data from ~200 articles reporting functioning QDSCs to give an overview of the current limitations in the technology. We find that the open circuit voltage limits the device efficiency and propose some strategies for overcoming this limitation.
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33
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Yang H, Wong E, Zhao T, Lee JD, Xin HL, Chi M, Fleury B, Tang HY, Gaulding EA, Kagan CR, Murray CB. Charge Transport Modulation in PbSe Nanocrystal Solids by Au xAg 1- x Nanoparticle Doping. ACS NANO 2018; 12:9091-9100. [PMID: 30148956 DOI: 10.1021/acsnano.8b03112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Nanocrystal (NC) solids are an exciting class of materials, whose physical properties are tunable by choice of the NCs as well as the strength of the interparticle coupling. One can consider these NCs as "artificial atoms" in analogy to the formation of condensed matter from atoms. Akin to atomic doping, the doping of a semiconducting NC solid with impurity NCs can drastically alter its electronic properties. A high degree of complexity is possible in these artificial structures by adjusting the size, shape, and composition of the building blocks, which enables "designer" materials with targeted properties. Here, we present the doping of the PbSe NC solids with a series of Au xAg1- x alloy nanoparticles (NPs). A combination of temperature-dependent electrical conductance and Seebeck coefficient measurements and room-temperature Hall effect measurements demonstrates that the incorporation of metal NPs both modifies the charge carrier density of the NC solids and introduces energy barriers for charge transport. These studies point to charge carrier injection from the metal NPs into the PbSe NC matrix. The charge carrier density and charge transport dynamics in the doped NC solids are adjustable in a wide range by employing the Au xAg1- x NP with different Au:Ag ratio as dopants. This doping strategy could be of great interest for thermoelectric applications taking advantage of the energy filtering effect introduced by the metal NPs.
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Affiliation(s)
| | | | | | | | - Huolin L Xin
- Center for Functional Nanomaterials , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Miaofang Chi
- Center for Nanophase Materials Sciences , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37830 , United States
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34
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Acebrón M, Galisteo-López JF, López C, Herrera FC, Mizrahi M, Requejo FG, Palomares FJ, Juárez BH. Unexpected Optical Blue Shift in Large Colloidal Quantum Dots by Anionic Migration and Exchange. J Phys Chem Lett 2018; 9:3124-3130. [PMID: 29781617 DOI: 10.1021/acs.jpclett.8b00741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Compositional changes taking place during the synthesis of alloyed CdSeZnS nanocrystals (NCs) allow shifting of the optical features to higher energy as the NCs grow. Under certain synthetic conditions, the effect of those changes on the surface/interface chemistry competes with and dominates over the conventional quantum confinement effect in growing NCs. These changes, identified by means of complementary advanced spectroscopic techniques such as XPS (X-ray photoelectron spectroscopy) and XAS (X-ray absorption spectroscopy), are understood in the frame of an ion migration and exchange mechanism taking place during the synthesis. Control over the synthetic routes during NC growth represents an alternative tool to tune the optical properties of colloidal quantum dots, broadening the versatility of the wet chemical methods.
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Affiliation(s)
- María Acebrón
- IMDEA Nanoscience , Faraday 9 , Cantoblanco, 28049 Madrid , Spain
| | - Juan F Galisteo-López
- Instituto de Ciencias de Materiales de Sevilla (ICMS) , Consejo Superior de Investigaciones Científicas (CSIC) , 41092 Sevilla , Spain
| | - Cefe López
- Instituto de Ciencias de Materiales de Madrid (ICMM) , Consejo Superior de Investigaciones Científicas (CSIC) , 28049 Madrid , Spain
| | - Facundo C Herrera
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) , CONICET and FCE, UNLP , CC/16, suc 4 , 1900 La Plata , Argentina
| | - Martín Mizrahi
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) , CONICET and FCE, UNLP , CC/16, suc 4 , 1900 La Plata , Argentina
| | - Félix G Requejo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) , CONICET and FCE, UNLP , CC/16, suc 4 , 1900 La Plata , Argentina
| | - F Javier Palomares
- Instituto de Ciencias de Materiales de Madrid (ICMM) , Consejo Superior de Investigaciones Científicas (CSIC) , 28049 Madrid , Spain
| | - Beatriz H Juárez
- IMDEA Nanoscience , Faraday 9 , Cantoblanco, 28049 Madrid , Spain
- Applied Physical Chemistry Department , Universidad Autónoma de Madrid , Cantoblanco, 28049 Madrid , Spain
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35
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Gopi A, Sajitha M, Haridas R, Varghese L, Yoosaf K. Cooperative and FRET-Assisted Brightness Enhancement in Oligo(phenylene ethynylene): Quantum Dot Organic-Inorganic Nanohybrids. Chem Asian J 2018; 13:1492-1499. [PMID: 29573188 DOI: 10.1002/asia.201800328] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Indexed: 12/27/2022]
Abstract
Herein, we combine the ideas of concerted emission from fluorophore ensembles and its further amplification through FRET in an organic-inorganic hybrid approach. Spherical and highly fluorescent organic nanoparticles (FONPs, Φf =0.38), prepared by the self-assembly of oligo(phenylene ethynylene) (OPE) molecules, were selected as a potential donor material. This organic core was then decorated with a shell of fluorescent CdSe/ZnS core-shell quantum dots (QDs; <d>≅5.5 nm, Φf =0.27) with the aid of a bifunctional ligand, mercaptopropionic acid. Its high extinction coefficient (ϵ≈4.1×105 m-1 cm-1 ) and good spectral match with the emission of the FONPs (J(λ)≈4.08×1016 m-1 cm-1 nm4 ) made them a better acceptor candidate to constitute an efficient FRET pair (ΦFRET =0.8). As a result, the QD fluorescence intensity was enhanced by more than twofold. The fundamental calculations carried out indicated an improvement in all the FRET parameters as the number of QDs around the FONPs was increased. This, together with the localization of multiple QDs in a nanometric dimension (volume≈1.8×106 nm3 ), gave highly bright reddish luminescent hybrid particles as visualized under a fluorescence microscope.
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Affiliation(s)
- Arun Gopi
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NIIST Campus, Thiruvananthapuram, 695019, Kerala, India
| | - Manikantan Sajitha
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NIIST Campus, Thiruvananthapuram, 695019, Kerala, India
| | - Reethu Haridas
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NIIST Campus, Thiruvananthapuram, 695019, Kerala, India
| | - Listo Varghese
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - Karuvath Yoosaf
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-NIIST Campus, Thiruvananthapuram, 695019, Kerala, India
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36
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Yun G, Pan S, Wang T, Guo J, Richardson JJ, Caruso F. Synthesis of Metal Nanoparticles in Metal-Phenolic Networks: Catalytic and Antimicrobial Applications of Coated Textiles. Adv Healthc Mater 2018; 7. [PMID: 29024556 DOI: 10.1002/adhm.201700934] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 09/11/2017] [Indexed: 12/16/2022]
Abstract
The synthesis of metal nanoparticle (NP)-coated textiles (nanotextiles) is achieved by a dipping process in water without toxic chemicals or complicated synthetic procedures. By taking advantage of the unique nature of tannic acid, metal-phenolic network-coated textiles serve as reducing and stabilizing sites for the generation of metal nanoparticles of controllable size. The textiles can be decorated with various metal nanoparticles, including palladium, silver, or gold, and exhibit properties derived from the presence of the metal nanoparticles, for example, catalytic activity in water (>96% over five cycles using palladium nanoparticles) and antibacterial activity against Gram-negative bacteria (inhibition of Escherichia coli using silver nanoparticles) that outperforms a commercial bandage. The reported strategy offers opportunities for the development of hybrid nanomaterials that may have application in fields outside of catalysis and antimicrobials, such as sensing and smart clothing.
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Affiliation(s)
- Gyeongwon Yun
- ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Shuaijun Pan
- ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Ting‐Yi Wang
- ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Junling Guo
- ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Joseph J. Richardson
- ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
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37
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Manfredi G, Lova P, Di Stasio F, Rastogi P, Krahne R, Comoretto D. Lasing from dot-in-rod nanocrystals in planar polymer microcavities. RSC Adv 2018; 8:13026-13033. [PMID: 35541227 PMCID: PMC9079743 DOI: 10.1039/c8ra01282b] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/01/2018] [Indexed: 11/21/2022] Open
Abstract
Colloidal nanocrystals attract considerable attention in the field of light emitting devices thanks to their high fluorescence quantum yield, low amplified spontaneous emission (ASE) threshold, and spectral tunability via electronic structure engineering and surface functionalization. Combining polymer microcavities with colloidal nanocrystals as gain material promises a solution-based fabrication route to plastic laser cavities as well as applications in the field of smart flexible large area light sources and sensors. Here we demonstrate lasing from polymer microcavities embedding solution processable dot-in-rod (DiR) CdSe/CdS nanocrystals. Two highly reflective polymer dielectric mirrors are prepared by spin-coating of alternated layers of polyacrylic acid and poly(N-vinyl carbazole), with their photonic band gap tailored to the emission of the DiRs. The DiRs are enclosed in the polymer microcavity by drop-cast deposition on one mirror, followed by pressing the mirrors onto each other. We obtain excellent overlap of the ASE band of the DiRs with the photonic band gap of the cavity and observe optically pumped lasing at 640 nm with a threshold of about 50 μJ cm−2. We report on the production of an optically pumped vertical cavity laser made by polymer mirrors embedding inorganic core@shell nanocrystals.![]()
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Affiliation(s)
- G. Manfredi
- Dipartimento di Chimica e Chimica Industriale
- Università Degli Studi di Genova
- Genoa
- Italy
| | - P. Lova
- Dipartimento di Chimica e Chimica Industriale
- Università Degli Studi di Genova
- Genoa
- Italy
| | - F. Di Stasio
- Nanochemistry Department
- Istituto Italiano di Tecnologia
- Genoa
- Italy
| | - P. Rastogi
- Nanochemistry Department
- Istituto Italiano di Tecnologia
- Genoa
- Italy
| | - R. Krahne
- Nanochemistry Department
- Istituto Italiano di Tecnologia
- Genoa
- Italy
| | - D. Comoretto
- Dipartimento di Chimica e Chimica Industriale
- Università Degli Studi di Genova
- Genoa
- Italy
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38
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Ray A, De A, Bhattacharya S. Study of energy transfer phenomenon between quantum dots and zinc porphyrin in solution. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.090] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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39
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Ilanchezhiyan P, Mohan Kumar G, Xiao F, Poongothai S, Madhan Kumar A, Siva C, Yuldashev SU, Lee DJ, Kwon YH, Kang TW. Ultrasonic-assisted synthesis of ZnTe nanostructures and their structural, electrochemical and photoelectrical properties. ULTRASONICS SONOCHEMISTRY 2017; 39:414-419. [PMID: 28732963 DOI: 10.1016/j.ultsonch.2017.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/05/2017] [Accepted: 05/05/2017] [Indexed: 06/07/2023]
Abstract
Colloidal zinc telluride (ZnTe) nanostructures were successfully processed through a simple and facile ultrasonic (sonochemical) treatment for photoelectronic applications. The particle-like morphological features, phase and nature of valence state of various metal ions existing in ZnTe were examined using electron and X-ray photoelectron spectroscopic tools. Raman spectroscopic measurements revealed the dominance of exciton-phonon coupling and occurrence of TeO2 traces in ZnTe through the corresponding vibrations. Optical bandgap of the ZnTe suspension was estimated to be around 2.15eV, authenticating the direct allowed transitions. The p-type electrical conductivity and charge carrier density of ZnTe were additionally estimated from the Bode, Nyquist and Mott-Schottky type impedance plots. The photoelectrical properties of ZnTe were investigated by fabricating p-ZnTe/n-Si heterostructures and studying their corresponding current-voltage characteristics under dark and white light illumination. The diodes revealed excellent rectifying behaviour with significant increase in reverse current under illumination. The stability of the devices were also affirmed through the time-dependent photoresponse characteristics, which actually suggested the improved and effective separation of photo generated electron hole pairs across the integrated heterojunctions. The obtained results also augment the potential of sonochemically processed ZnTe for application in photo detection and sensor related functions.
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Affiliation(s)
- P Ilanchezhiyan
- Nano-Information Technology Academy (NITA), Dongguk University, Seoul, Republic of Korea
| | - G Mohan Kumar
- Nano-Information Technology Academy (NITA), Dongguk University, Seoul, Republic of Korea.
| | - Fu Xiao
- Nano-Information Technology Academy (NITA), Dongguk University, Seoul, Republic of Korea
| | - S Poongothai
- Nano-Information Technology Academy (NITA), Dongguk University, Seoul, Republic of Korea
| | - A Madhan Kumar
- Center of Research Excellence in Corrosion, King Fahd University of Petroleum & Minerals, Saudi Arabia
| | - C Siva
- Department of Physics and Nanotechnology, SRM University, Kattankulathur, India
| | - Sh U Yuldashev
- Nano-Information Technology Academy (NITA), Dongguk University, Seoul, Republic of Korea
| | - D J Lee
- Quantum-Functional Semiconductor Research Center, Dongguk University, Seoul, Republic of Korea
| | - Y H Kwon
- Quantum-Functional Semiconductor Research Center, Dongguk University, Seoul, Republic of Korea
| | - T W Kang
- Nano-Information Technology Academy (NITA), Dongguk University, Seoul, Republic of Korea
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40
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Zaiats G, Ikeda S, Kinge S, Kamat PV. Quantum Dot Light-Emitting Devices: Beyond Alignment of Energy Levels. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30741-30745. [PMID: 28841285 DOI: 10.1021/acsami.7b07893] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Multinary semiconductor nanoparticles such as CuInS2, AgInS2, and the corresponding alloys with ZnS hold promise for designing future quantum dot light-emitting devices (QLED). The QLED architectures require matching of energy levels between the different electron and hole transport layers. In addition to energy level alignment, conductivity and charge transfer interactions within these layers determine the overall efficiency of QLED. By employing CuInS2-ZnS QDs we succeeded in fabricating red-emitting QLED using two different hole-transporting materials, polyvinylcarbazole and poly(4-butylphenyldiphenylamine). Despite the similarity of the HOMO-LUMO energy levels of these two hole transport materials, the QLED devices exhibit distinctly different voltage dependence. The difference in onset voltage and excited state interactions shows the complexity involved in selecting the hole transport materials for display devices.
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Affiliation(s)
- Gary Zaiats
- Notre Dame Radiation Laboratory, Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | - Shingo Ikeda
- Notre Dame Radiation Laboratory, Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
- Osaka Municipal Technical Research Institute , Osaka 536-8553, Japan
| | - Sachin Kinge
- Advanced Technology Division Toyota Motor Europe, Zaventem B-1930, Belgium
| | - Prashant V Kamat
- Notre Dame Radiation Laboratory, Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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41
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Berends AC, de Mello Donega C. Ultrathin One- and Two-Dimensional Colloidal Semiconductor Nanocrystals: Pushing Quantum Confinement to the Limit. J Phys Chem Lett 2017; 8:4077-4090. [PMID: 28799764 PMCID: PMC5592648 DOI: 10.1021/acs.jpclett.7b01640] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 08/11/2017] [Indexed: 05/22/2023]
Abstract
Research on ultrathin nanomaterials is one of the fastest developing areas in contemporary nanoscience. The field of ultrathin one- (1D) and two-dimensional (2D) colloidal nanocrystals (NCs) is still in its infancy, but offers the prospect of production of ultrathin nanomaterials in liquid-phase at relatively low costs, with versatility in terms of composition, size, shape, and surface control. In this Perspective, the state of the art in the field is concisely outlined and critically discussed to highlight the essential concepts and challenges. We start by presenting a brief overview of the ultrathin colloidal 1D and 2D semiconductor NCs prepared to date, after which the synthesis strategies and formation mechanisms of both 1D and 2D NCs are discussed. The properties of these low-dimensional materials are then reviewed, with emphasis on the optical properties of luminescent NCs. Finally, the future prospects for the field are addressed.
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Aamir M, Adhikari T, Sher M, Khan MD, Akhtar J, Nunzi JM. Cesium Lead Halide Perovskite Nanostructures: Tunable Morphology and Halide Composition. CHEM REC 2017; 18:230-238. [DOI: 10.1002/tcr.201700034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Muhammad Aamir
- Department of Chemistry; Queen's University; Kingston ON K7L 3N6 Canada
- Department of Chemistry; Allama Iqbal Open University; Islamabad Pakistan
| | - Tham Adhikari
- Department of Chemistry; Queen's University; Kingston ON K7L 3N6 Canada
| | - Muhammad Sher
- Department of Chemistry; Allama Iqbal Open University; Islamabad Pakistan
| | - Malik Dilshad Khan
- Department of Chemistry; University of Zululand; Private Bag X1001 Kwadlangezwa 3886
| | - Javeed Akhtar
- Department of chemistry Polymers & Materials synthesis (PMS) Laboratory; Mirpur university of science & Technology (MUST); Allama Iqbal Road, Mirpur Azad Jammu & Kashmir 10250 Pakistan
| | - Jean-Michel Nunzi
- Department of Chemistry; Queen's University; Kingston ON K7L 3N6 Canada
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Jing Q, Zhang M, Huang X, Ren X, Wang P, Lu Z. Surface passivation of mixed-halide perovskite CsPb(Br xI 1-x) 3 nanocrystals by selective etching for improved stability. NANOSCALE 2017; 9:7391-7396. [PMID: 28405658 DOI: 10.1039/c7nr01287j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In recent years, there has been an unprecedented rise in the research of halide perovskites because of their important optoelectronic applications, including photovoltaic cells, light-emitting diodes, photodetectors and lasers. The most pressing question concerns the stability of these materials. Here faster degradation and PL quenching are observed at higher iodine content for mixed-halide perovskite CsPb(BrxI1-x)3 nanocrystals, and a simple yet effective method is reported to significantly enhance their stability. After selective etching with acetone, surface iodine is partially etched away to form a bromine-rich surface passivation layer on mixed-halide perovskite nanocrystals. This passivation layer remarkably stabilizes the nanocrystals, making their PL intensity improved by almost three orders of magnitude. It is expected that a similar passivation layer can also be applied to various other kinds of perovskite materials with poor stability issues.
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Affiliation(s)
- Qiang Jing
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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Yadav S, Adhikary B, Tripathy P, Sapra S. Efficient Charge Extraction from CdSe/ZnSe Dots-on-Plates Nanoheterostructures. ACS OMEGA 2017; 2:2231-2237. [PMID: 31457574 PMCID: PMC6640952 DOI: 10.1021/acsomega.7b00174] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 05/09/2017] [Indexed: 06/01/2023]
Abstract
An efficient and a selective charge extraction from a new type of heterostructured material is demonstrated: the quasi-type-II structure formed upon deposition of ZnSe quantum dots on CdSe nanoplatelets, termed as CdSe/ZnSe dots-on-plates (DoPs) heterostructures. Insights into the charge extraction mechanism are gained from the present studies. Quenching experiments on nanoplatelets (NPLs) and DoPs using electron (benzoquinone) and hole (pyridine) quenchers show the possibility of electron extraction leaving behind the hole in the nanostructures. These outcomes indicate more labile electron extraction in comparison with the hole from these DoP structures vis-à-vis the plate only nanostructures, thereby enabling materials for devices requiring only one type of charges. In CdSe NPLs, the excitons are short-lived making them difficult for various applications involving charge separation. The CdSe/ZnSe DoPs could be alternate candidates for overcoming the difficulties involved with NPLs.
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Chen J, Yang B, Li C, Zheng K, Žídek K, Pullerits T. Photostability of the Oleic Acid-Encapsulated Water-Soluble Cd x Se y Zn 1-x S 1-y Gradient Core-Shell Quantum Dots. ACS OMEGA 2017; 2:1922-1929. [PMID: 31457551 PMCID: PMC6640918 DOI: 10.1021/acsomega.7b00316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/27/2017] [Indexed: 05/02/2023]
Abstract
Composite systems where quantum dots (QDs) are combined with other nanomaterials (e.g., gold nanorods) in aqueous solutions have attracted broad attention-both for their potential in applications and for studies of fundamental processes. However, high-quality QDs are typically prepared in organic solvents, and the transfer of QDs to an aqueous phase is needed to create the desired QD composites. Photostability of the transferred QDs-both the steady-state and photo-induced dynamic properties-is essential for studying the processes in the composites and for their applications. We present a detailed study of the photostability of aqueous Cd x Se y Zn1-x S1-y gradient core-shell QDs obtained by various approaches using linker exchange and surfactant encapsulation. Beside the steady-state photoluminescence (PL) emission stability, we also study changes in the PL decay. From the variety of the studied samples, the water-soluble QDs encapsulated by a double layer of oleic acid show superior properties, that is, stable PL emission and PL decay under continuous light or pulsed-laser light irradiation. We demonstrate that the double-layer encapsulation of QDs can be used to create QDs-metal nanoparticle composites.
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Affiliation(s)
- Junsheng Chen
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China
| | - Bin Yang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China
| | - Chuanshuai Li
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Kaibo Zheng
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- Gas
Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Karel Žídek
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- Regional
Centre for Special Optics and Optoelectronic Systems (TOPTEC), Institute
of Plasma Physics, Academy of Sciences of
the Czech Republic, Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic
- E-mail: (K.Ž.)
| | - Tõnu Pullerits
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- E-mail: (T.P.)
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Hou B, Cho Y, Kim BS, Ahn D, Lee S, Park JB, Lee YW, Hong J, Im H, Morris SM, Sohn JI, Cha S, Kim JM. Red green blue emissive lead sulfide quantum dots: heterogeneous synthesis and applications. JOURNAL OF MATERIALS CHEMISTRY. C 2017; 5:3692-3698. [PMID: 30009027 PMCID: PMC6003545 DOI: 10.1039/c7tc00576h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 03/09/2017] [Indexed: 05/22/2023]
Abstract
Visible emission colloidal quantum dots (QDs) have shown promise in optical and optoelectronic applications. These QDs are typically composed of relatively expensive elements in the form of indium, cadmium, and gallium since alternative candidate materials exhibiting similar properties are yet to be realized. Herein, for the first time, we report red green blue (RGB) photoluminescences with quantum yields of 18% from earth-abundant lead sulfide (PbS) QDs. The visible emissive property is mainly attributed to a high degree of crystallinity even for the extremely small QD sizes (1-3 nm), which is realized by employing a heterogeneous reaction methodology at high growth temperatures (>170 °C). We demonstrate that the proposed heterogeneous synthetic method can be extended to the synthesis of other metal chalcogenide QDs, such as zinc sulfide and zinc selenide, which are promising for future industrial applications. More importantly, benefiting from the enlarged band gaps, the as-prepared PbS solar cells show an impressive open circuit voltage (∼0.8 V) beyond that reported to date.
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Affiliation(s)
- Bo Hou
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - Yuljae Cho
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - Byung-Sung Kim
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - Docheon Ahn
- Beamline Department , Pohang Accelerator Laboratory , Pohang 790-784 , Republic of Korea
| | - Sanghyo Lee
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - Jong Bae Park
- Jeonju Centre , Korea Basic Science Institute , Jeonju , Jeollabuk-do 54907 , Republic of Korea
| | - Young-Woo Lee
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - John Hong
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - Hyunsik Im
- Division of Physics and Semiconductor Science , Dongguk University , Seoul 100-715 , Republic of Korea
| | - Stephen M Morris
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - Jung Inn Sohn
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - SeungNam Cha
- Department of Engineering Science , University of Oxford , Parks Road , Oxford OX1 3PJ , UK . ;
| | - Jong Min Kim
- Department of Engineering , University of Cambridge , 9 JJ Thomson Avenue , Cambridge CB3 0FA , UK
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Wang Y, Ta VD, Leck KS, Tan BHI, Wang Z, He T, Ohl CD, Demir HV, Sun H. Robust Whispering-Gallery-Mode Microbubble Lasers from Colloidal Quantum Dots. NANO LETTERS 2017; 17:2640-2646. [PMID: 28288279 DOI: 10.1021/acs.nanolett.7b00447] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Microlasers hold great promise for the development of photonics and optoelectronics. Among the discovered optical gain materials, colloidal quantum dots (CQDs) have been recognized as the most appealing candidate due to the facile emission tunability and solution processability. However, to date, it is still challenging to develop CQD-based microlasers with low cost yet high performance. Moreover, the poor long-term stability of CQDs remains to be the most critical issue, which may block their laser aspirations. Herein, we developed a unique but generic approach to forming a novel type of a whispering-gallery-mode (WGM) microbubble laser from the hybrid CQD/poly(methyl methacrylate) (PMMA) nanocomposites. The formation mechanism of the microbubbles was unraveled by recording the drying process of the nanocomposite droplets. Interestingly, these microbubbles naturally serve as the high-quality WGM laser resonators. By simply changing the CQDs, the lasing emission can be tuned across the whole visible spectral range. Importantly, these microbubble lasers exhibit unprecedented long-term stability (over one year), sufficient for practical applications. As a proof-of-concept, the potential of water vapor sensing was demonstrated. Our results represent a significant advance in microlasers based on the advantageous CQDs and may offer new possibilities for photonics and optoelectronics.
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Affiliation(s)
| | - Van Duong Ta
- Department of Physics, King's College London , Strand, London, WC2R 2LS, United Kingdom
| | - Kheng Swee Leck
- School of Electrical and Electronic Engineering, Luminous! Center of Excellence for Semiconductor Lighting and Displays, Nanyang Technological University , Nanyang Avenue, Singapore 639798, Singapore
| | | | | | - Tingchao He
- College of Physics Science and Technology, Shenzhen University , Shenzhen 518060, China
| | | | - Hilmi Volkan Demir
- School of Electrical and Electronic Engineering, Luminous! Center of Excellence for Semiconductor Lighting and Displays, Nanyang Technological University , Nanyang Avenue, Singapore 639798, Singapore
- Department of Electrical and Electronics Engineering, Department of Physics, and UNAM-National Nanotechnology Research Center, Bilkent University , Bilkent, Ankara 06800, Turkey
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Gugula K, Entrup M, Stegemann L, Seidel S, Pöttgen R, Strassert CA, Bredol M. Solid Solution Quantum Dots with Tunable Dual or Ultrabroadband Emission for LEDs. ACS APPLIED MATERIALS & INTERFACES 2017; 9:521-528. [PMID: 27933758 DOI: 10.1021/acsami.6b08190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Quantum dots that efficiently emit white light directly or feature a "candle-like" orange photoluminescence with a high Stokes shift are presented. The key to obtaining these unique emission properties is through controlled annealing of the core Cu-In-Ga-S quantum dots in the presence of zinc ions, thus forming Zn-Cu-In-Ga-S solid solutions with different distributions of the substitution and dopant elements. The as-obtained nanocrystals feature excellent quantum yields of up to 82% with limited or even eliminated reabsorption and a color rendering index of bare particles of up to 88, enabling the production of high-quality white LEDs using a single color converter layer. Furthermore, the color properties can be tuned by changing the experimental conditions as well as by varying the excitation wavelength. The multicomponent luminescence mechanism is discussed in detail based on similar literature reports. White LEDs with unparalleled color quality and competitive luminous efficacies are presented herein.
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Affiliation(s)
- Krzysztof Gugula
- Department of Chemical Engineering, Münster University of Applied Sciences , Stegerwaldstraße 39, 48565 Steinfurt, Germany
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster , Corrensstraße 30, 48149 Münster, Germany
| | - Michael Entrup
- Physikalisches Institut, Westfälische Wilhelms-Universität Münster , Wilhelm-Klemm-Straße 10, 48149 Münster, Germany
| | - Linda Stegemann
- Physikalisches Institut and Center for Nanotechnology, Westfälische Wilhelms-Universität Münster , Heisenbergstraße 11, 48149 Münster, Germany
| | - Stefan Seidel
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster , Corrensstraße 30, 48149 Münster, Germany
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster , Corrensstraße 30, 48149 Münster, Germany
| | - Cristian A Strassert
- Physikalisches Institut and Center for Nanotechnology, Westfälische Wilhelms-Universität Münster , Heisenbergstraße 11, 48149 Münster, Germany
| | - Michael Bredol
- Department of Chemical Engineering, Münster University of Applied Sciences , Stegerwaldstraße 39, 48565 Steinfurt, Germany
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Martynenko IV, Litvin AP, Purcell-Milton F, Baranov AV, Fedorov AV, Gun'ko YK. Application of semiconductor quantum dots in bioimaging and biosensing. J Mater Chem B 2017; 5:6701-6727. [DOI: 10.1039/c7tb01425b] [Citation(s) in RCA: 200] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this review we present new concepts and recent progress in the application of semiconductor quantum dots (QD) as labels in two important areas of biology, bioimaging and biosensing.
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Affiliation(s)
- I. V. Martynenko
- BAM Federal Institute for Materials Research and Testing
- 12489 Berlin
- Germany
- ITMO University
- St. Petersburg
| | | | | | | | | | - Y. K. Gun'ko
- ITMO University
- St. Petersburg
- Russia
- School of Chemistry and CRANN
- Trinity College Dublin
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50
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Wolf S, Feldmann C. Mikroemulsionen: neue Möglichkeiten zur Erweiterung der Synthese anorganischer Nanopartikel. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Silke Wolf
- Institut für Anorganische Chemie; Karlsruher Institut für Technologie (KIT); Engesserstraße 15 76131 Karlsruhe Deutschland
| | - Claus Feldmann
- Institut für Anorganische Chemie; Karlsruher Institut für Technologie (KIT); Engesserstraße 15 76131 Karlsruhe Deutschland
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