1
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Wei H, Si T, Xu F, Fan W, Yang T, Cao B, Juan F, Xu J, Wu Y. Enhanced photoluminescence of double perovskite Cs 2SnI 6 nanocrystals via Na + doping. OPTICS EXPRESS 2023; 31:25298-25306. [PMID: 37475338 DOI: 10.1364/oe.495150] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/04/2023] [Indexed: 07/22/2023]
Abstract
Double perovskites without lead element have attracted great attention in recent years. Further increasing the photoluminescence quantum yield of lead-free double perovskites is necessary for their potential applications. In this work, Na+ doped Cs2SnI6 nanocrystals were synthesized by hot injection method. It was displayed that all the NCs have uniform hexagonal shape with good crystallization. Energy dispersing spectroscopy and X-ray photoelectron spectroscopy proves the Na+ ions were doped in the lattice of perovskite structure. The photoluminescence intensity of doped NCs is increased by 2.7-fold than that of pure NCs. A maximum photoluminescence quantum yield of 72% is obtained. The luminous mechanism was investigated by femtosecond transient absorption spectrum and a self-trap emission was proved by the observation of ground state bleaching and photo-induced absorption signals.
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2
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Ali MA, Bahajjaj AAA, Al-Qaisi S, Sillanpää M, Khan A, Wang X. Structural, electronic, magnetic and thermoelectric properties of Tl 2 NbX 6 (X = Cl, Br) variant perovskites calculated via density functional theory. J Comput Chem 2023. [PMID: 37224190 DOI: 10.1002/jcc.27166] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 04/07/2023] [Accepted: 05/11/2023] [Indexed: 05/26/2023]
Abstract
This article presents detailed structural, electronic, magnetic, and thermoelectric properties of two experimentally existing isostructural variant perovskite compounds Tl2 NbX6 (X = Cl, Br) with the help of first principles calculations. As per requirement of stability in the device applications, the structural and thermodynamic stabilities were, respectively verified by tolerance factor and negative formation energies. The structural parameters in ferromagnetic phase were calculated and found in close agreement with the available experimental results. The electronic nature was found as half metallic from spin polarized calculations of electronic band structures and density of states, where the semiconductor nature was found in the spin down states and metallic nature in the spin up states. The magnetic moments of both the compounds were calculated as 1 μB majorly contributed by Nb atom. The Boltzmann transport theory was implemented via BoltzTraP for calculating the spin resolved thermoelectric parameters, such as Seebeck coefficient, electronic and thermal conductivities, and figure of merit. Overall, both the compounds were found suitable for use in spintronics and spin Seebeck effect for energy applications.
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Affiliation(s)
- Malak Azmat Ali
- Department of Physics, Government Post Graduate Jahanzeb College Saidu Sharif, Swat, Pakistan
| | | | - Samah Al-Qaisi
- Palestinian Ministry of Education and Higher Education, Nablus, Palestine
| | - Mika Sillanpää
- Department of Biological and Chemical Engineering, Aarhus University, Aarhus, Denmark
| | - Afzal Khan
- Department of Physics, University of Peshawar, Peshawar, Pakistan
| | - Xiaoyu Wang
- State Key Labortory of Superhard Materials, Key Labortory of Automobile Mateials of MOE, Jilin Provential Intenational Cooperation Key Labortory of High-Efficiency Clean Energy Materials, School of Materials Science and Engineering, Jilin University, Changchun, China
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3
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Yang C, Guo F, Wang S, Chen W, Zhang Y, Wang N, Li Z, Wang J. Admirable stability achieved by ns 2 ions Co-doping for all-inorganic metal halides towards optical anti-counterfeiting. RSC Adv 2023; 13:10884-10892. [PMID: 37033439 PMCID: PMC10074776 DOI: 10.1039/d3ra00351e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 03/23/2023] [Indexed: 04/11/2023] Open
Abstract
Optical materials play a momentous role in anti-counterfeiting field, such as authentication, currency and security. The development of tunable optical properties and optical responses to a range of external stimuli is quite imperative for the growing demand of optical anti-counterfeiting technology. Metal halide perovskites have attracted much attention of researchers due to their excellent optical properties. In addition, co-doping methods have been gradually applied to the research of metal halide perovskites, by which more abundant luminescence phenomena can be introduced into the host perovskite. Herein, the ns2 ions of bismuth (Bi3+) and antimony (Sb3+) ions co-doped zero-dimensional Cs2SnCl6 metal halide with an excitation-wavelength-dependent emission phenomenon is synthesized as an efficient multimodal luminescent material, the luminescence of which is tunable and covers a wide region of color. What's more, a dynamic dual-emission phenomenon is captured when the excitation wavelength changes from 320 nm to 420 nm for Cs2SnCl6:Bi0.08Sb0.12 crystals. Moreover, the Bi3+ and Sb3+ doped metal halide material shows great enhancement in solvent resistance and thermal stability compared to the pristine Cs2SnCl6. The admirable stability and distinguishable photoluminescence (PL) phenomenon of this all-inorganic metal halide has great potential to be applied in optical anti-counterfeiting technology. Furthermore, the co-doping method can accelerate the discovery of new luminescence phenomena in original metal halide perovskites.
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Affiliation(s)
- Chuang Yang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Fengwan Guo
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Hubei University Wuhan 430062 P. R. China
| | - Shanping Wang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Wenwen Chen
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Yu Zhang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Nan Wang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Zhuozhen Li
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Juan Wang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei University Wuhan 43006 P. R. China
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4
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Tang X, Wen X, Yang F. Ultra-stable blue-emitting lead-free double perovskite Cs 2SnCl 6 nanocrystals enabled by an aqueous synthesis on a microfluidic platform. NANOSCALE 2022; 14:17641-17653. [PMID: 36412501 DOI: 10.1039/d2nr05510d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Blue emitting Sn-based lead-free halide perovskite nanocrystals (NCs) are considered to be a promising material in lighting and displays. However, industrialised fabrication of blue-emitting NCs still remains a significant challenge due to the use of toxic solvents and optical instability, not mentioning in large-scale synthesis. In this work, a green-route synthesis of blue-emitting lead-free halide perovskite Cs2SnCl6 powders is developed, in which deionized water with a small amount of inorganic acid is used as the solvent and the synthesis of the Cs2SnCl6 powders is achieved on a microfluidic platform. Using the Cs2SnCl6 powders, we prepare Cs2SnCl6 NCs via an ultrasonication process. Changing the volume ratio of the ligands (oleic acid to oleylamine) can alter the photoluminescence (PL) characteristics of the prepared NCs, including the PL-peak wavelength, PL-peak intensity and quantum yield. The highest photoluminescence quantum yield (PLQY) of 13.4% is achieved by the Cs2SnCl6 NCs prepared with the volume ratio of oleic acid to oleylamine of 40 μL to 10 μL. A long-term PL stability test demonstrates that the as-synthesized Cs2SnCl6 NCs can retain a stable PLQY over a period of 60 days. This work opens up a new path for a large-scale green-route synthesis of blue-emitting Sn-based lead-free NCs, such as Cs2SnX6 (Cl, Br and I), towards their applications in optoelectronics.
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Affiliation(s)
- Xiaobing Tang
- Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA.
| | - Xiyu Wen
- Center for Aluminium Technology, University of Kentucky, Lexington, KY 40506, USA
| | - Fuqian Yang
- Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA.
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Zuo T, Qi F, Yam C, Meng L. Lead-free all-inorganic halide double perovskite materials for optoelectronic applications: progress, performance and design. Phys Chem Chem Phys 2022; 24:26948-26961. [DOI: 10.1039/d2cp03463h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The geometrical and electronic structures of all-inorganic halide double perovskites and their applications in optoelectronic devices are reviewed. Novel design methods are desirable to develop this type of perovskite with superior performance.
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Affiliation(s)
- Tao Zuo
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Fangfang Qi
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, Fujian 350007, P. R. China
| | - ChiYung Yam
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, 518000, China
- Hong Kong Quantum AI Lab Limited, Hong Kong, China
| | - Lingyi Meng
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, Fujian 350007, P. R. China
- Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, P. R. China
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6
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Lead-free Cs2SnX6 (X = Cl, Br, I) nanocrystals in mesoporous SiO2 with more stable emission from VIS to NIR light. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.139023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Saidi L, Samet A, Dammak T, Pillet S, Abid Y. Down and up conversion luminescence of the lead-free organic metal halide material: (C 9H 8NO) 2SnCl 6·2H 2O. Phys Chem Chem Phys 2021; 23:15574-15581. [PMID: 34259267 DOI: 10.1039/d1cp01702k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work deals with the optical properties of hybrid organic metal halide material namely (C9H8NO)2SnCl6·2H2O. Its structure is built up from isolated [SnCl6]2- octahedral dianions surrounded by Hydroxyl quinolinium organic cations (C9H8NO)+, abbreviated as [HQ]+. Unlike the usual hybrid materials, where metal halide ions are luminescent semiconductors while the organic ones are optically inactive, [HQ]2SnCl6·2H2O contains two optically active entities: [HQ]+ organic cations and [SnCl6]2- dianions. The optical properties of the synthesized crystals were studied by optical absorption spectroscopy, photoluminescence measurements and DFT calculations of electronic density of states. These studies have shown that both organic and inorganic entities have very close HOMO-LUMO gaps and very similar band alignments favoring the resonant energy transfer process. In addition, measurements of luminescence under variable excitations reveal an intense green luminescence around 497 nm under UV excitation (down conversion) and infrared excitation (up conversion luminescence). The down conversion luminescence is assigned to the π-π* transition within the [HQ] + organic cations involving charge transfer between the organic and inorganic entities, whereas the up-conversion luminescence is based on the triplet-triplet annihilation mechanism (TTA).
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Affiliation(s)
- Lamia Saidi
- Laboratoire de Physique Appliquée, Université de Sfax, BP 1171, 3018 Sfax, Tunisia.
| | - Amira Samet
- Laboratoire de Physique Appliquée, Université de Sfax, BP 1171, 3018 Sfax, Tunisia.
| | - Thameur Dammak
- Laboratoire de Physique Appliquée, Université de Sfax, BP 1171, 3018 Sfax, Tunisia.
| | - Sebastien Pillet
- Université de Lorraine, CNRS, CRM2, Nancy, 54506 Vandoeuvre-les-Nancy, France
| | - Younes Abid
- Laboratoire de Physique Appliquée, Université de Sfax, BP 1171, 3018 Sfax, Tunisia.
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Veronese A, Ciarrocchi C, Marelli M, Quadrelli P, Patrini M, Malavasi L. Morphological and Optical Tuning of Lead-Free Cs2SnX6 (X = I, Br) Perovskite Nanocrystals by Ligand Engineering. FRONTIERS IN ELECTRONICS 2021. [DOI: 10.3389/felec.2021.703182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In order to overcome the toxicity of lead halide perovskites, in recent years the research has focused on replacing lead with more environmentally friendly metals like tin, germanium, bismuth or antimony. However, lead-free perovskites still present instability issues and low performances that do not make them competitive when compared to their lead-based counterparts. Here we report the synthesis of lead-free Cs2SnX6 (X = Br, I) nanostructures of different shapes by using various surface ligands. These compounds are a promising alternative to lead halide perovskites in which the replacement of divalent lead (Pb(II)) with tetravalent tin (Sn(IV)) causes a modification of the standard perovskite structure. We investigate the effects of different amines on the morphology and size of Cs2SnX6 (X = Br, I) nanocrystals, presenting a facile hot-infection method to directly synthesize three-dimensional (3D) nanoparticles as well as two-dimensional (2D) nanoplatelets. The amines not only modify the shape of the crystals, but also affect their optical properties: increasing the length of the amine carbon chain we observe a widening in the bandgap of the compounds and a blue-shift of their emission peak. Alongside the tuning of the chemical composition and the reduction of the crystal size, our study offers a new insight in controlling the physical properties of perovskite nanocrystals by means of the capping ligands, paving the way for future research on lead-free materials.
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Chiara R, Morana M, Malavasi L. Germanium-Based Halide Perovskites: Materials, Properties, and Applications. Chempluschem 2021; 86:879-888. [PMID: 34126001 DOI: 10.1002/cplu.202100191] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/25/2021] [Indexed: 11/09/2022]
Abstract
Perovskites are attracting an increasing interest in the wide community of photovoltaics, optoelectronic, and detection, traditionally relying on lead-based systems. This Minireview provides an overview of the current status of experimental and computational results available on Ge-containing 3D and low-dimensional halide perovskites. While stability issues analogous to those of tin-based materials are present, some strategies to afford this problem in Ge metal halide perovskites (MHPs) for photovoltaics have already been identified and successfully employed, reaching efficiencies of solar devices greater than 7 % at up to 500 h of illumination. Interestingly, some Ge-containing MHPs showed promising nonlinear optical responses as well as quite broad emissions, which are worthy of further investigation starting from the basic materials chemistry perspective, where a large space for properties modulation through compositions/alloying/fnanostructuring is present.
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Affiliation(s)
- Rossella Chiara
- Department of Chemistry, University of Pavia and INSTM, Via Taramelli 16, 27100, Pavia>, Italy
| | - Marta Morana
- Department of Chemistry, University of Pavia and INSTM, Via Taramelli 16, 27100, Pavia>, Italy
| | - Lorenzo Malavasi
- Department of Chemistry, University of Pavia and INSTM, Via Taramelli 16, 27100, Pavia>, Italy
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10
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Tang Y, Tang S, Luo M, Guo Y, Zheng Y, Lou Y, Zhao Y. All-inorganic lead-free metal halide perovskite quantum dots: progress and prospects. Chem Commun (Camb) 2021; 57:7465-7479. [PMID: 34259252 DOI: 10.1039/d1cc01783g] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Lead halide perovskite quantum dots have drawn worldwide attention due to their quantum confinement effect and excellent optical gain properties. It is worth noting that due to the toxicity of lead ions and the inherent instability of organic groups, research on all-inorganic lead-free metal halide perovskite quantum dots (ILFHPQDs) has become a hot spot in recent years. This paper summarizes the latest research progress of ILFHPQDs, analyzes the sources and limitations affecting the performance of ILFHPQDs, and provides the improvement methods. Firstly, the typical synthesis strategies of ILFHPQDs are discussed, followed by a focus on the structural characteristics, optoelectronic properties and stability of each type of ILFHPQD. Next, the applications of ILFHPQDs in devices are investigated. Finally, the challenges, solutions and future application directions of ILFHPQDs are prospected.
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Affiliation(s)
- Yuanqian Tang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Southeast University, Nanjing, 211189, China.
| | - Songzhi Tang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Southeast University, Nanjing, 211189, China.
| | - Ming Luo
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Southeast University, Nanjing, 211189, China.
| | - Yanmei Guo
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Southeast University, Nanjing, 211189, China.
| | - Yingping Zheng
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Southeast University, Nanjing, 211189, China.
| | - Yongbing Lou
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory for Science and Application of Molecular Ferroelectrics, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Southeast University, Nanjing, 211189, China.
| | - Yixin Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
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11
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Mahesh KPO, Chang CY, Hong WL, Wen TH, Lo PH, Chiu HZ, Hsu CL, Horng SF, Chao YC. Lead-free cesium tin halide nanocrystals for light-emitting diodes and color down conversion. RSC Adv 2020; 10:37161-37167. [PMID: 35521228 PMCID: PMC9057115 DOI: 10.1039/d0ra06139e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/23/2020] [Indexed: 11/21/2022] Open
Abstract
Organometal halide perovskites are attracting a great deal of attention because of their long carrier diffusion lengths, wide wavelength tunability, and narrow-band emission. However, the toxicity of lead has caused considerable environmental and health concerns. In this work, lead-free cesium tin halide nanocrystals are synthesized and investigated. CsSnBr3 and CsSnI3 nanocrystals, 25 and 7 nm in size, are synthesized by a facile hot injection method. Absorption spectroscopy, photoluminescence spectroscopy, and X-ray diffraction were used to understand their structural and optical properties. CsSnBr3 and CsSnI3 nanocrystals show emission peaks at 683 and 938 nm, respectively. These nanocrystals show shelf stability for a few months. Temperature-dependent photoluminescence is utilized to know more about fundamental physical parameters, such as exciton binding energy, charge carrier-phonon interactions and band gap. Light-emitting diodes and color down-conversion films are also demonstrated using these lead free perovskite nanocrystals.
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Affiliation(s)
- K P O Mahesh
- Department of Physics, National Taiwan Normal University Taipei Taiwan 11677 Republic of China
| | - Che-Yu Chang
- Department of Physics, Chung Yuan Christian University Chung-Li Taiwan 32023 Republic of China
| | - Wei-Li Hong
- Institute of Electronics Engineering, National Tsing Hua University Hsinchu Taiwan 300 Republic of China
| | - Tzu-Hsiang Wen
- Department of Physics, National Taiwan Normal University Taipei Taiwan 11677 Republic of China
| | - Pei-Hsuan Lo
- Department of Physics, National Taiwan Normal University Taipei Taiwan 11677 Republic of China
| | - Hao-Zhe Chiu
- Department of Physics, National Taiwan Normal University Taipei Taiwan 11677 Republic of China
| | - Ching-Ling Hsu
- Department of Physics, Chung Yuan Christian University Chung-Li Taiwan 32023 Republic of China
| | - Sheng-Fu Horng
- Institute of Electronics Engineering, National Tsing Hua University Hsinchu Taiwan 300 Republic of China
| | - Yu-Chiang Chao
- Department of Physics, National Taiwan Normal University Taipei Taiwan 11677 Republic of China
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12
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Umedov ST, Grigorieva AV, Lepnev LS, Knotko AV, Nakabayashi K, Ohkoshi SI, Shevelkov AV. Indium Doping of Lead-Free Perovskite Cs 2SnI 6. Front Chem 2020; 8:564. [PMID: 32850618 PMCID: PMC7417766 DOI: 10.3389/fchem.2020.00564] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 06/02/2020] [Indexed: 12/02/2022] Open
Abstract
Structure and properties of an inorganic perovskite Cs2SnI6 demonstrated its potential as a light-harvester or electron-hole transport material; however, its optoelectronic properties are poorer than those of lead-based perovskites. Here, we report the way of light tuning of absorption and transport properties of cesium iodostannate(IV) Cs2SnI6 via partial heterovalent substitution of tin for indium. Light absorption and optical bandgaps of materials have been investigated by UV-vis absorption and photoluminescent spectroscopies. Low-temperature electron paramagnetic resonance spectroscopy was used to study the kind of paramagnetic centers in materials.
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Affiliation(s)
- Shodruz T Umedov
- Department of Materials Science, Lomonosov Moscow State University, Moscow, Russia
| | - Anastasia V Grigorieva
- Department of Materials Science, Lomonosov Moscow State University, Moscow, Russia.,Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Leonid S Lepnev
- Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Alexander V Knotko
- Department of Materials Science, Lomonosov Moscow State University, Moscow, Russia.,Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
| | - Koji Nakabayashi
- Department of Chemistry, School of Sciences, University of Tokyo, Tokyo, Japan
| | - Shin-Ichi Ohkoshi
- Department of Chemistry, School of Sciences, University of Tokyo, Tokyo, Japan
| | - Andrei V Shevelkov
- Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia
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13
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Bonomi S, Patrini M, Bongiovanni G, Malavasi L. Versatile vapor phase deposition approach to cesium tin bromide materials CsSnBr 3, CsSn 2Br 5 and Cs 2SnBr 6. RSC Adv 2020; 10:28478-28482. [PMID: 35520057 PMCID: PMC9055831 DOI: 10.1039/d0ra04680a] [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: 05/27/2020] [Accepted: 07/27/2020] [Indexed: 12/16/2022] Open
Abstract
We report on the successful application of RF-magnetron sputtering to deposit, by using a single type of target, three different materials in the form of thin films within the Cs-Sn-Br compositional range, namely, CsSnBr3, CsSn2Br5 and Cs2SnBr6. It is shown that, by playing with the deposition parameters and post-deposition treatments, it is possible to stabilize these three perovskites or perovskite related compounds by exploiting the versatility of vapor phase deposition. Full characterization in terms of crystal structure, optical properties and morphology is reported. The power of vapor phase methods in growing all-inorganic materials of interest for photovoltaic and optoelectronic applications is demonstrated here, indicating the advantageous use of sputtering for these complex materials.
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Affiliation(s)
- Sara Bonomi
- Department of Chemistry, University of Pavia, INSTM Viale Taramelli 16 Pavia 27100 Italy +39 382 987921
| | - Maddalena Patrini
- Department of Physics, University of Pavia, CNISM Via Bassi 6 Pavia 27100 Italy
| | - Giovanni Bongiovanni
- Department of Physics, University of Cagliari S.P. Monserrato-Sestu km 0.7 Cagliari 09042 Italy
| | - Lorenzo Malavasi
- Department of Chemistry, University of Pavia, INSTM Viale Taramelli 16 Pavia 27100 Italy +39 382 987921
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