1
|
Huang YM, James Singh K, Hsieh TH, Langpoklakpam C, Lee TY, Lin CC, Li Y, Chen FC, Chen SC, Kuo HC, He JH. Gateway towards recent developments in quantum dot-based light-emitting diodes. NANOSCALE 2022; 14:4042-4064. [PMID: 35246672 DOI: 10.1039/d1nr05288h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Quantum dots (QDs), with their excellent photoluminescence, narrow emission linewidth, and wide color coverage, provide unrivaled advantages for advanced display technologies, enabling full-color micro-LED displays. It is indeed critical to have a fundamental understanding of how QD properties affect micro-LED display performance in order to develop the most energy-efficient display device in the near future. However, to take a more detailed look at the stability issues and passivation ways of QDs is essential for accelerating the commercialization of QD-based LED technologies. Knowing about the most recent breakthroughs in QD-based LEDs can give a good indication of how they might be used in shaping the future of displays. In this review, we discuss the characteristics of QD-based LEDs for the applications of display and lighting technologies. Various approaches for synthesis and the stability improvement of QDs are addressed in detail, along with recent advancements towards QD-based LED breakthroughs. Moreover, we summarize our latest research findings in QD-based LEDs, providing valuable information about the potential of QD-based LEDs for future display technologies.
Collapse
Affiliation(s)
- Yu-Ming Huang
- Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
- Institute of Photonic System, National Yang Ming Chiao Tung University, Tainan 71150, Taiwan
- Semiconductor Research Center, Hon Hai Research Institute, Taipei 11492, Taiwan.
| | - Konthoujam James Singh
- Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
| | - Tsou-Hwa Hsieh
- Technology Development Center, InnoLux Corporation, Hsinchu 35053, Taiwan
- Institute of Communications Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Catherine Langpoklakpam
- Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
| | - Tzu-Yi Lee
- Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
| | - Chien-Chung Lin
- Institute of Photonic System, National Yang Ming Chiao Tung University, Tainan 71150, Taiwan
- Graduate Institute of Photonics and Optoelectronics, Department of Electrical Engineering, National Taiwan University, Taipei 10617, Taiwan.
| | - Yiming Li
- Institute of Communications Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Fang-Chung Chen
- Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
| | - Shih-Chen Chen
- Semiconductor Research Center, Hon Hai Research Institute, Taipei 11492, Taiwan.
| | - Hao-Chung Kuo
- Department of Photonics, Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
- Semiconductor Research Center, Hon Hai Research Institute, Taipei 11492, Taiwan.
| | - Jr-Hau He
- Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| |
Collapse
|
2
|
Chen B, Li D, Wang F. InP Quantum Dots: Synthesis and Lighting Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002454. [PMID: 32613755 DOI: 10.1002/smll.202002454] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/30/2020] [Indexed: 05/24/2023]
Abstract
InP quantum dots (QDs) are typical III-V group semiconductor nanocrystals that feature large excitonic Bohr radius and high carrier mobility. The merits of InP QDs include large absorption coefficient, broad color tunability, and low toxicity, which render them promising alternatives to classic Cd/Pb-based QDs for applications in practical settings. Over the past two decades, the advances in wet-chemistry methods have enabled the synthesis of small-sized colloidal InP QDs with the assistance of organic ligands. By proper selection of synthetic protocols and precursor materials coupled with surface passivation, the QYs of InP QDs are pushed to near unity with modest color purity. The state-of-the-art InP QDs with appealing optical and electronic properties have excelled in many applications with the potential for commercialization. This work focuses on the recent development of wet-chemistry protocols and various precursor materials for the synthesis and surface modification of InP QDs. Current methods for constructing light-emitting diodes using novel InP-based QDs are also summarized.
Collapse
Affiliation(s)
- Bing Chen
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| | - Dongyu Li
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- Key Laboratory of Environmentally Friendly Functional Materials and Devices, Lingnan Normal University, Zhanjiang, 524048, China
| | - Feng Wang
- Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, 518057, China
| |
Collapse
|
3
|
Deng K, Luo Z, Tan L, Quan Z. Self-assembly of anisotropic nanoparticles into functional superstructures. Chem Soc Rev 2020; 49:6002-6038. [PMID: 32692337 DOI: 10.1039/d0cs00541j] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Self-assembly of colloidal nanoparticles (NPs) into superstructures offers a flexible and promising pathway to manipulate the nanometer-sized particles and thus make full use of their unique properties. This bottom-up strategy builds a bridge between the NP regime and a new class of transformative materials across multiple length scales for technological applications. In this field, anisotropic NPs with size- and shape-dependent physical properties as self-assembly building blocks have long fascinated scientists. Self-assembly of anisotropic NPs not only opens up exciting opportunities to engineer a variety of intriguing and complex superlattice architectures, but also provides access to discover emergent collective properties that stem from their ordered arrangement. Thus, this has stimulated enormous research interests in both fundamental science and technological applications. This present review comprehensively summarizes the latest advances in this area, and highlights their rich packing behaviors from the viewpoint of NP shape. We provide the basics of the experimental techniques to produce NP superstructures and structural characterization tools, and detail the delicate assembled structures. Then the current understanding of the assembly dynamics is discussed with the assistance of in situ studies, followed by emergent collective properties from these NP assemblies. Finally, we end this article with the remaining challenges and outlook, hoping to encourage further research in this field.
Collapse
Affiliation(s)
- Kerong Deng
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Key Laboratory of Energy Conversion and Storage Technologies, Ministry of Education, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong 518055, China.
| | - Zhishan Luo
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Key Laboratory of Energy Conversion and Storage Technologies, Ministry of Education, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong 518055, China.
| | - Li Tan
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Key Laboratory of Energy Conversion and Storage Technologies, Ministry of Education, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong 518055, China.
| | - Zewei Quan
- Department of Chemistry, Academy for Advanced Interdisciplinary Studies, Key Laboratory of Energy Conversion and Storage Technologies, Ministry of Education, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong 518055, China.
| |
Collapse
|
4
|
Zhang BQ, Liu Y, Zuo Y, Chen JS, Song JM, Niu HL, Mao CJ. Colloidal Synthesis and Thermoelectric Properties of CuFeSe₂ Nanocrystals. NANOMATERIALS 2017; 8:nano8010008. [PMID: 29278381 PMCID: PMC5791095 DOI: 10.3390/nano8010008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 12/09/2017] [Accepted: 12/24/2017] [Indexed: 01/08/2023]
Abstract
Copper-based chalcogenides that contain abundant, low-cost and environmentally-friendly elements, are excellent materials for numerous energy conversion applications, such as photocatalysis, photovoltaics, photoelectricity and thermoelectrics (TE). Here, we present a high-yield and upscalable colloidal synthesis route for the production of monodisperse ternary I-III-VI₂ chalcogenides nanocrystals (NCs), particularly stannite CuFeSe₂, with uniform shape and narrow size distributions by using selenium powder as the anion precursor and CuCl₂·2H₂O and FeCl₃ as the cationic precursors. The composition, the state of valence, size and morphology of the CuFeSe₂ materials were examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM) and high resolution transmission electron microscope (HRTEM), respectively. Furthermore, the TE properties characterization of these dense nanomaterials compacted from monodisperse CuFeSe₂ NCs by hot press at 623 K were preliminarily studied after ligand removal by means of hydrazine and hexane solution. The TE performances of the sintered CuFeSe₂ pellets were characterized in the temperature range from room temperature to 653 K. Finally, the dimensionless TE figure of merit (ZT) of this Earth-abundant and intrinsic p-type CuFeSe₂ NCs is significantly increased to 0.22 at 653 K in this work, which is demonstrated to show a promising TE materialand makes it a possible p-type candidate for medium-temperature TE applications.
Collapse
Affiliation(s)
- Bing-Qian Zhang
- The Key Laboratory of Environment Friendly Polymer Materials of Anhui Province, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China.
| | - Yu Liu
- The Key Laboratory of Environment Friendly Polymer Materials of Anhui Province, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China.
- Catalonia Institute for Energy Research-IREC, SantAdrià de Besòs, 08930 Barcelona, Spain.
| | - Yong Zuo
- The Key Laboratory of Environment Friendly Polymer Materials of Anhui Province, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China.
- Catalonia Institute for Energy Research-IREC, SantAdrià de Besòs, 08930 Barcelona, Spain.
| | - Jing-Shuai Chen
- The Key Laboratory of Environment Friendly Polymer Materials of Anhui Province, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China.
| | - Ji-Ming Song
- The Key Laboratory of Environment Friendly Polymer Materials of Anhui Province, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China.
| | - He-Lin Niu
- The Key Laboratory of Environment Friendly Polymer Materials of Anhui Province, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China.
| | - Chang-Jie Mao
- The Key Laboratory of Environment Friendly Polymer Materials of Anhui Province, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China.
| |
Collapse
|
5
|
Coughlan C, Ibáñez M, Dobrozhan O, Singh A, Cabot A, Ryan KM. Compound Copper Chalcogenide Nanocrystals. Chem Rev 2017; 117:5865-6109. [PMID: 28394585 DOI: 10.1021/acs.chemrev.6b00376] [Citation(s) in RCA: 327] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility. The outstanding functional properties of these materials stems from the relationship between their band structure and defect concentration, including charge carrier concentration and electronic conductivity character, which consequently affects their optoelectronic, optical, and plasmonic properties. This, combined with several metastable crystal phases and stoichiometries and the low energy of formation of defects, makes the reproducible synthesis of these materials, with tunable parameters, remarkable. Further to this, the review captures the progress of the hierarchical assembly of these NCs, which bridges the link between their discrete and collective properties. Their ubiquitous application set has cross-cut energy conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling), sensors (electrochemical, biochemical), biomedical devices (magnetic resonance imaging, X-ray computer tomography), and medical therapies (photochemothermal therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of advances in the synthesis, assembly, and application of these NCs in the past decade has the potential to significantly impact society, both economically and environmentally.
Collapse
Affiliation(s)
- Claudia Coughlan
- Department of Chemical Sciences and Bernal Institute, University of Limerick , Limerick, Ireland
| | - Maria Ibáñez
- Catalonia Energy Research Institute - IREC, Sant Adria de Besos , Jardins de les Dones de Negre n.1, Pl. 2, 08930 Barcelona, Spain
| | - Oleksandr Dobrozhan
- Catalonia Energy Research Institute - IREC, Sant Adria de Besos , Jardins de les Dones de Negre n.1, Pl. 2, 08930 Barcelona, Spain.,Department of Electronics and Computing, Sumy State University , 2 Rymskogo-Korsakova st., 40007 Sumy, Ukraine
| | - Ajay Singh
- Materials Physics & Applications Division: Center for Integrated Nanotechnologies, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States
| | - Andreu Cabot
- Catalonia Energy Research Institute - IREC, Sant Adria de Besos , Jardins de les Dones de Negre n.1, Pl. 2, 08930 Barcelona, Spain.,ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - Kevin M Ryan
- Department of Chemical Sciences and Bernal Institute, University of Limerick , Limerick, Ireland
| |
Collapse
|
6
|
Liu P, Singh S, Guo Y, Wang JJ, Xu H, Silien C, Liu N, Ryan KM. Assembling Ordered Nanorod Superstructures and Their Application as Microcavity Lasers. Sci Rep 2017; 7:43884. [PMID: 28272427 PMCID: PMC5341026 DOI: 10.1038/srep43884] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 01/30/2017] [Indexed: 01/15/2023] Open
Abstract
Herein we report the formation of multi-layered arrays of vertically aligned and close packed semiconductor nanorods in perfect registry at a substrate using electric field assisted assembly. The collective properties of these CdSexS1-x nanorod emitters are harnessed by demonstrating a relatively low amplified spontaneous emission (ASE) threshold and a high net optical gain at medium pump intensity. The importance of order in the system is highlighted where a lower ASE threshold is observed compared to disordered samples.
Collapse
Affiliation(s)
- Pai Liu
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland
| | - Shalini Singh
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland
| | - Yina Guo
- Bernal Institute University of Limerick, Limerick, Ireland
| | - Jian-Jun Wang
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland
| | - Hongxing Xu
- The School of Physics and Technology, The Institute for Advanced Studies and The Center for Nanoscience and Nanotechnology, Wuhan University, Wuhan, 430072, China
| | - Christophe Silien
- Department of Physics and Bernal Institute, University of Limerick, Limerick, Ireland
| | - Ning Liu
- Department of Physics and Bernal Institute, University of Limerick, Limerick, Ireland
| | - Kevin M Ryan
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland
| |
Collapse
|
7
|
van der Stam W, Gradmann S, Altantzis T, Ke X, Baldus M, Bals S, de Mello
Donega C. Shape Control of Colloidal Cu 2-x S Polyhedral Nanocrystals by Tuning the Nucleation Rates. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2016; 28:6705-6715. [PMID: 27713598 PMCID: PMC5046172 DOI: 10.1021/acs.chemmater.6b03098] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 08/30/2016] [Indexed: 05/05/2023]
Abstract
Synthesis protocols for colloidal nanocrystals (NCs) with narrow size and shape distributions are of particular interest for the successful implementation of these nanocrystals into devices. Moreover, the preparation of NCs with well-defined crystal phases is of key importance. In this work, we show that Sn(IV)-thiolate complexes formed in situ strongly influence the nucleation and growth rates of colloidal Cu2-x S polyhedral NCs, thereby dictating their final size, shape, and crystal structure. This allowed us to successfully synthesize hexagonal bifrustums and hexagonal bipyramid NCs with low-chalcocite crystal structure, and hexagonal nanoplatelets with various thicknesses and aspect ratios with the djurleite crystal structure, by solely varying the concentration of Sn(IV)-additives (namely, SnBr4) in the reaction medium. Solution and solid-state 119Sn NMR measurements show that SnBr4 is converted in situ to Sn(IV)-thiolate complexes, which increase the Cu2-x S nucleation barrier without affecting the precursor conversion rates. This influences both the nucleation and growth rates in a concentration-dependent fashion and leads to a better separation between nucleation and growth. Our approach of tuning the nucleation and growth rates with in situ-generated Sn-thiolate complexes might have a more general impact due to the availability of various metal-thiolate complexes, possibly resulting in polyhedral NCs of a wide variety of metal-sulfide compositions.
Collapse
Affiliation(s)
- Ward van der Stam
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O.
Box 80000, 3508 TA Utrecht, The Netherlands
| | - Sabine Gradmann
- NMR
Spectroscopy, Bijvoet Center for Biomolecular Research, Department
of Chemistry, Faculty of Science, Utrecht
University, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Thomas Altantzis
- EMAT, University
of Antwerp, Groenenborgerlaan
171, B-2020 Antwerp, Belgium
| | - Xiaoxing Ke
- EMAT, University
of Antwerp, Groenenborgerlaan
171, B-2020 Antwerp, Belgium
| | - Marc Baldus
- NMR
Spectroscopy, Bijvoet Center for Biomolecular Research, Department
of Chemistry, Faculty of Science, Utrecht
University, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Sara Bals
- EMAT, University
of Antwerp, Groenenborgerlaan
171, B-2020 Antwerp, Belgium
| | - Celso de Mello
Donega
- Condensed
Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, P.O.
Box 80000, 3508 TA Utrecht, The Netherlands
- E-mail:
| |
Collapse
|
8
|
Giner-Casares JJ, Reguera J. Directed self-assembly of inorganic nanoparticles at air/liquid interfaces. NANOSCALE 2016; 8:16589-16595. [PMID: 27722594 DOI: 10.1039/c6nr05054a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Inorganic nanoparticles (NPs) appear as the forefront functional structure in nanotechnology. The preparation of functional materials based on inorganic NPs requires their assembly onto well-defined structures. Within this context, self-assembly at air-liquid interfaces is probably the best candidate for a universal procedure for active materials composed of assembled NPs. The detailed in situ mechanism of the lateral self-assembly and vertical organization of NPs at air-liquid interfaces is still unknown despite its extended use. The most common and promising methods for addressing this open issue are reviewed herein. The self-assembled films can be used in situ or further be transferred to solid substrates as the main constituents of novel functional materials. Plasmonic NPs at interfaces are highly interesting, given the broad range of applications of the plasmonic field, and will be discussed more in detail.
Collapse
Affiliation(s)
- Juan J Giner-Casares
- Institute of Fine Chemistry and Nanochemistry, Department of Physical Chemistry and Applied Thermodynamics, University of Córdoba, Campus Universitario de Rabanales, 14014, Córdoba, Spain.
| | - Javier Reguera
- CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia-San Sebastián, Spain. and Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain and Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), 50018 Aragon, Spain
| |
Collapse
|
9
|
Jung S, Lee S, Cha JH, Jung DY. Synthesis of CuInS2by Sulfide Ion-Exchange of CuIn(OH)5Precursors. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Seonho Jung
- Department of Chemistry; Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University; Suwon 440-746 Republic of Korea
| | - Sangnam Lee
- Department of Chemistry; Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University; Suwon 440-746 Republic of Korea
| | - Ji-Hyun Cha
- Department of Chemistry; Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University; Suwon 440-746 Republic of Korea
| | - Duk-Young Jung
- Department of Chemistry; Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University; Suwon 440-746 Republic of Korea
| |
Collapse
|
10
|
van der Stam W, Rabouw FT, Vonk SJW, Geuchies JJ, Ligthart H, Petukhov AV, de Mello Donega C. Oleic Acid-Induced Atomic Alignment of ZnS Polyhedral Nanocrystals. NANO LETTERS 2016; 16:2608-14. [PMID: 26930124 DOI: 10.1021/acs.nanolett.6b00221] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Ordered two-dimensional (2D) superstructures of colloidal nanocrystals (NCs) can be tailored by the size, shape, composition, and surface chemistry of the NC building blocks, which can give directionality to the resulting superstructure geometry. The exact formation mechanism of 2D NC superstructures is however not yet fully understood. Here, we show that oleic acid (OA) ligands induce atomic alignment of wurtzite ZnS bifrustum-shaped NCs. We find that in the presence of OA ligands the {002} facets of the ZnS bifrustums preferentially adhere to the liquid-air interface. Furthermore, OA ligands induce inter-NC interactions that also orient the NCs in the plane of the liquid-air interface, resulting in atomically aligned 2D superstructures. We follow the self-assembly process in real-time with in situ grazing incidence small-angle X-ray scattering and find that the NCs form a hexagonal superstructure at early stages after which they come closer over time, resulting in a close-packed NC superstructure. Our results demonstrate the profound influence that surface ligands have on the directionality of 2D NC superstructures and highlight the importance of detailed in situ studies in order to understand the self-assembly of NCs into 2D superstructures.
Collapse
Affiliation(s)
- Ward van der Stam
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University , P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Freddy T Rabouw
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University , P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Sander J W Vonk
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University , P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Jaco J Geuchies
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University , P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Hans Ligthart
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University , P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| | - Andrei V Petukhov
- Physical and Colloid Chemistry, Debye Institute for Nanomaterials Science , Padualaan 8, 3584 CH Utrecht, The Netherlands
- Laboratory of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Celso de Mello Donega
- Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, Utrecht University , P.O. Box 80000, 3508 TA Utrecht, The Netherlands
| |
Collapse
|
11
|
Li R, Zhang J, Tan R, Gerdes F, Luo Z, Xu H, Hollingsworth JA, Klinke C, Chen O, Wang Z. Competing Interactions between Various Entropic Forces toward Assembly of Pt3Ni Octahedra into a Body-Centered Cubic Superlattice. NANO LETTERS 2016; 16:2792-9. [PMID: 26977777 DOI: 10.1021/acs.nanolett.6b00564] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Anisotropic nanocrystal assembled supercrystals with open superlattices (SLs) manifest novel and unique properties, but poor understanding of the nucleation/growth mechanisms limits their design and fabrication for practical applications. Using highly anisotropic Pt3Ni octahedral nanocrystals, we have grown large single supercrystals with an open body-centered cubic (bcc) superlattice that has a low filling factor of 26.8%. Synchrotron-based X-ray structural reconstruction fully revealed the coherence of translational and orientational orderings and determined that the constituent octahedra arrange themselves with the vertex-to-vertex and face-to-face configurations along the SL[100] and SL[111] directions, respectively. The large face-to-face separation and flexible vertex-to-vertex elastic contact provided the rattle space and supporting axis for local rotations of Pt3Ni octahedra within the bcc superlattice. Development of orientational disordering along with robust preservation of translational ordering during the heating process of a supercrystal in the oleic acid wetting environment confirmed the dominance of rotational entropy of hard octahedra in the formation of the open bcc superlattice. Ultimate achievement of dynamic equilibrium between the vertex-oriented elastic repulsions and the face-oriented attractions of surface-coating ligands governs the structural and mechanical stability of the supercrystal. This discovery provides significant insights into the design and control of geometrical shapes for the fabrication of highly anisotropic nanocrystals into desired open superlattices with tailored optical and electronic properties.
Collapse
Affiliation(s)
- Ruipeng Li
- Cornell High Energy Synchrotron Source, Cornell University , Ithaca, New York 14850, United States
| | - Jun Zhang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, China
| | - Rui Tan
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Frauke Gerdes
- Institute of Physical Chemistry, University of Hamburg , 20146 Hamburg, Germany
| | - Zhiping Luo
- Department of Chemistry and Physics, Fayetteville State University , Fayetteville, North Carolina 28301, United States
| | | | | | - Christian Klinke
- Institute of Physical Chemistry, University of Hamburg , 20146 Hamburg, Germany
| | - Ou Chen
- Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States
| | - Zhongwu Wang
- Cornell High Energy Synchrotron Source, Cornell University , Ithaca, New York 14850, United States
| |
Collapse
|
12
|
van der Stam W, Berends AC, de Mello Donega C. Prospects of Colloidal Copper Chalcogenide Nanocrystals. Chemphyschem 2016; 17:559-81. [DOI: 10.1002/cphc.201500976] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Ward van der Stam
- Debye Institute for Nanomaterials Science; Utrecht University; P.O. Box 80000 3508 TA Utrecht The Netherlands
| | - Anne C. Berends
- Debye Institute for Nanomaterials Science; Utrecht University; P.O. Box 80000 3508 TA Utrecht The Netherlands
| | - Celso de Mello Donega
- Debye Institute for Nanomaterials Science; Utrecht University; P.O. Box 80000 3508 TA Utrecht The Netherlands
| |
Collapse
|
13
|
Singh A, Singh A, Ciston J, Bustillo K, Nordlund D, Milliron DJ. Synergistic Role of Dopants on the Morphology of Alloyed Copper Chalcogenide Nanocrystals. J Am Chem Soc 2015; 137:6464-7. [DOI: 10.1021/jacs.5b02880] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ajay Singh
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- The
Molecular Foundry and §National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Amita Singh
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- The
Molecular Foundry and §National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | | | | | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource, Stanford, California 94309, United States
| | - Delia J. Milliron
- McKetta
Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| |
Collapse
|
14
|
Draguta S, McDaniel H, Klimov VI. Tuning carrier mobilities and polarity of charge transport in films of CuInSe(x)S(2-x) quantum dots. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:1701-1705. [PMID: 25613726 DOI: 10.1002/adma.201404878] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 11/26/2014] [Indexed: 06/04/2023]
Abstract
CuInSe(x)S(2-x) quantum dot field-effect transistors show p-type, n-type, and ambipolar behaviors with carrier mobilities up to 0.03 cm(2) V(-1) s(-1). Although some design rules from studies of cadmium and lead containing quantum dots can be applied, remarkable differences are observed including a strong gating effect in as-synthesized nanocyrstals with long ligands.
Collapse
Affiliation(s)
- Sergiu Draguta
- Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | | | | |
Collapse
|
15
|
Wang W, Jiang J, Ding T, Wang C, Zuo J, Yang Q. Alternative synthesis of CuFeSe2 nanocrystals with magnetic and photoelectric properties. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2235-41. [PMID: 25562289 DOI: 10.1021/am508844w] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Monodisperse CuFeSe2 nanocrystals of high quality have been successfully synthesized for the first time using a hot-solution injection method from the reaction of metallic acetylacetonates with diphenyl diselenide (Ph2Se2) in oleylamine with addition of oleic acid at 255 °C for 90 min. The characterizations of X-ray diffraction, electron microscopy, and compositional analysis reveal that the resulting CuFeSe2 nanocrystals are of tetragonal phase with a stoichiometric composition. The CuFeSe2 nanocrystals exhibit well-defined quasi-cubic shape with an average size of ∼18 nm, and their shape can be tuned from quasi-cubes to quasi-spheres by adjusting the reaction parameters. Magnetic measurement reveals that the as-synthesized CuFeSe2 nanocrystals are ferromagnetic and paramagnetic at 4 and 300 K, respectively. Additionally, the current-voltage (I-V) behavior of the CuFeSe2 nanocrystals suggests that they are promising candidates for application in optoelectronics and solar energy conversion.
Collapse
Affiliation(s)
- Wenliang Wang
- Hefei National Laboratory of Physical Sciences at the Microscale, ‡Department of Chemistry, §Laboratory of Nanomaterials for Energy Conversion, and ∥Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China (USTC) , Hefei 230026, Anhui, P. R. China
| | | | | | | | | | | |
Collapse
|
16
|
Sheng P, Li W, Wang X, Tong X, Cai Q. Colloidal Synthesis and Photocatalytic Performance of Size-Controllable Solid or Hollow CuInSe2Nanocrystals. Chempluschem 2014. [DOI: 10.1002/cplu.201402161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
17
|
Tao X, Mafi E, Gu Y. Synthesis and Ultrafast Carrier Dynamics of Single-Crystal Two-Dimensional CuInSe2 Nanosheets. J Phys Chem Lett 2014; 5:2857-2862. [PMID: 26278089 DOI: 10.1021/jz501242m] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report, for the first time, the synthesis of single-crystal two-dimensional (2D) CuInSe2 nanosheets and the studies of ultrafast carrier dynamics and transport in this 2D material. Particularly, single-crystal 2D CuInSe2 with various thicknesses in the nanometer regime were fabricated by a solid-state chemical reaction between Cu and single-crystal exfoliated In2Se3 nanosheets. Characteristics of transient optical reflectivity, obtained from femtosecond optical pump-probe measurements on single CuInSe2 nanosheets, suggest that the hot carrier cooling process dominates the carrier dynamics within a few picoseconds following the optical excitation. Spatially resolved pump-probe measurements, coupled to simple model calculations, were used to obtain the ambipolar hot carrier diffusion coefficient in single nanosheets. The dependence of the hot carrier diffusion coefficient on the nanosheet thickness provides insight into the limiting mechanisms of hot carrier transport and can be used to gauge the possibility of efficient hot carrier collection in nanostructured CuInSe2 solar cells.
Collapse
Affiliation(s)
- Xin Tao
- Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, United States
| | - Elham Mafi
- Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, United States
| | - Yi Gu
- Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, United States
| |
Collapse
|
18
|
van der Stam W, Gantapara AP, Akkerman QA, Soligno G, Meeldijk JD, van Roij R, Dijkstra M, de Mello Donega C. Self-assembly of colloidal hexagonal bipyramid- and bifrustum-shaped ZnS nanocrystals into two-dimensional superstructures. NANO LETTERS 2014; 14:1032-7. [PMID: 24433112 DOI: 10.1021/nl4046069] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We present a combined experimental, theoretical, and simulation study on the self-assembly of colloidal hexagonal bipyramid- and hexagonal bifrustum-shaped ZnS nanocrystals (NCs) into two-dimensional superlattices. The simulated NC superstructures are in good agreement with the experimental ones. This shows that the self-assembly process is primarily driven by minimization of the interfacial free-energies and maximization of the packing density. Our study shows that a small truncation of the hexagonal bipyramids is sufficient to change the symmetry of the resulting superlattice from hexagonal to tetragonal, highlighting the crucial importance of precise shape control in the fabrication of functional metamaterials by self-assembly of colloidal NCs.
Collapse
Affiliation(s)
- Ward van der Stam
- Condensed Matter and Interfaces and §Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University , 3508 TA Utrecht, The Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Yarema O, Bozyigit D, Rousseau I, Nowack L, Yarema M, Heiss W, Wood V. Highly Luminescent, Size- and Shape-Tunable Copper Indium Selenide Based Colloidal Nanocrystals. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2013; 25:3753-3757. [PMID: 24748721 PMCID: PMC3982935 DOI: 10.1021/cm402306q] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 08/12/2013] [Indexed: 05/22/2023]
Abstract
We report a simple, high-yield colloidal synthesis of copper indium selenide nanocrystals (CISe NCs) based on a silylamide-promoted approach. The silylamide anions increase the nucleation rate, which results in small-sized NCs exhibiting high luminescence and constant NC stoichiometry and crystal structure regardless of the NC size and shape. In particular, by systematically varying synthesis time and temperature, we show that the size of the CISe NCs can be precisely controlled to be between 2.7 and 7.9 nm with size distributions down to 9-10%. By introducing a specific concentration of silylamide-anions in the reaction mixture, the shape of CISe NCs can be preselected to be either spherical or tetrahedral. Optical properties of these CISe NCs span from the visible to near-infrared region with peak luminescence wavelengths of 700 to 1200 nm. The luminescence efficiency improves from 10 to 15% to record values of 50-60% by overcoating as-prepared CISe NCs with ZnSe or ZnS shells, highlighting their potential for applications such as biolabeling and solid state lighting.
Collapse
Affiliation(s)
- Olesya Yarema
- Department
of Information Technology and Electrical Engineering, ETH Zurich, Gloriastr.
35, 8092 Zurich, Switzerland
| | - Deniz Bozyigit
- Department
of Information Technology and Electrical Engineering, ETH Zurich, Gloriastr.
35, 8092 Zurich, Switzerland
| | - Ian Rousseau
- Department
of Information Technology and Electrical Engineering, ETH Zurich, Gloriastr.
35, 8092 Zurich, Switzerland
| | - Lea Nowack
- Department
of Information Technology and Electrical Engineering, ETH Zurich, Gloriastr.
35, 8092 Zurich, Switzerland
| | - Maksym Yarema
- Institute
of Semiconductor and Solid State Physics, University Linz, Altenbergerstr.
69, 4040 Linz, Austria
| | - Wolfgang Heiss
- Institute
of Semiconductor and Solid State Physics, University Linz, Altenbergerstr.
69, 4040 Linz, Austria
| | - Vanessa Wood
- Department
of Information Technology and Electrical Engineering, ETH Zurich, Gloriastr.
35, 8092 Zurich, Switzerland
| |
Collapse
|
20
|
Yang J, Kim JY, Yu JH, Ahn TY, Lee H, Choi TS, Kim YW, Joo J, Ko MJ, Hyeon T. Copper–indium–selenide quantum dot-sensitized solar cells. Phys Chem Chem Phys 2013; 15:20517-25. [DOI: 10.1039/c3cp54270j] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|