1
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Lei B, Cui W, Sheng J, Zhong F, Dong F. Halogen-Site Regulation in Cs 3Bi 2X 9 Quantum Dots for Efficient and Selective Oxidation of Benzyl Alcohol Driven by Solar Light. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308088. [PMID: 38009494 DOI: 10.1002/smll.202308088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 10/13/2023] [Indexed: 11/29/2023]
Abstract
Sluggish charge kinetics and low selectivity limit the solar-driven selective organic transformations under mild conditions. Herein, an efficient strategy of halogen-site regulation, based on the precise control of charge transfer and molecule activation by rational design of Cs3Bi2X9 quantum dots photocatalysts, is proposed to achieve both high selectivity and yield of benzyl-alcohol oxidation. In situ PL spectroscopy study reveals that the Bi─Br bonds formed in the form of Br-associated coordination can enhance the separation and transfer of photoexcited carriers during the practical reaction. As the active center, the exclusive Bi─Br covalence can benefit the benzyl-alcohol activation for producing carbon-centered radicals. As a result, the Cs3Bi2Br9 with this atomic coordination achieves a conversion ratio of 97.9% for benzyl alcohol and selectivity of 99.6% for aldehydes, which are 56.9- and 1.54-fold higher than that of Cs3Bi2Cl9. Combined with quasi-in situ EPR, in situ ATR-FTIR spectra, and DFT calculation, the conversion of C6H5-CH2OH to C6H5-CH2* at Br-related coordination is revealed to be a determining step, which can be accelerated via halogen-site regulation for enhancing selectivity and photocatalytic efficiency. The mechanistic insights of this research elucidate how halogen-site regulation in favor of charge transfer and molecule activation toward efficient and selective oxidation of benzyl alcohol.
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Affiliation(s)
- Ben Lei
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Wen Cui
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China
| | - Jianping Sheng
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Fengyi Zhong
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
| | - Fan Dong
- Research Center for Carbon-Neutral Environmental & Energy Technology, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China
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2
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Zeng Z, Wang Y, Xie YM, Zhu Z, Yang Y, Ma Y, Hao X, Lee CS, Cheng Y, Tsang SW. On the Ion Coordination and Crystallization of Metal Halide Perovskites by In Situ Dynamic Optical Probing. SMALL METHODS 2023:e2300899. [PMID: 37749953 DOI: 10.1002/smtd.202300899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/29/2023] [Indexed: 09/27/2023]
Abstract
Controlling the crystallization to achieve high-quality homogeneous perovskite film is the key strategy in developing perovskite electronic devices. Here, an in situ dynamic optical probing technique is demonstrated that can monitor the fast crystallization of perovskites and effectively minimize the influence of laser excitation during the measurement. This study finds that the typical static probing technique would damage and induce phase segregation in the perovskite films during the excitation. These issues can be effectively resolved with the dynamic probing approach. It also found that the crystallization between MAPbI3 and MAPbI2 Br is strikingly different. In particular, MAPbI2 Br suffers from inefficient nucleation during the spin-coating that strongly affects the uniform crystal growth in the annealing process. The commonly used pre-heating process is found at a lower temperature not only can further promote the nucleation but also to complete the crystallization of MAPbI2 Br. The role of further annealing at a higher temperature is to facilitate ion-dissociation on the crystal surface to form a passivation layer to stabilize the MAPbI2 Br lattices. The device performance is strongly correlated with the film formation mechanism derived from the in situ results. This work demonstrates that the in situ technique can provide deep insight into the crystallization mechanism, and help to understand the growth mechanism of perovskites with different compositions and dimensionalities.
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Affiliation(s)
- Zixin Zeng
- Department of Materials Science and Engineering, Center of Super-Diamond and Advance Films (COSDAF), Hong Kong Institute for Clean Energy, City University of Hong Kong, Hong Kong SAR, China
| | - Yunfan Wang
- Department of Materials Science and Engineering, Center of Super-Diamond and Advance Films (COSDAF), Hong Kong Institute for Clean Energy, City University of Hong Kong, Hong Kong SAR, China
| | - Yue-Min Xie
- Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, China
| | - Zhaohua Zhu
- Department of Chemistry, Center of Super-Diamond and Advance Films (COSDAF), City University of Hong Kong, Hong Kong SAR, China
| | - Yajie Yang
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, 610065, China
| | - Yuhui Ma
- Zhengzhou University, Zhengzhou, Henan, 450001, China
| | - Xia Hao
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, 610065, China
| | - Chun-Sing Lee
- Department of Chemistry, Center of Super-Diamond and Advance Films (COSDAF), City University of Hong Kong, Hong Kong SAR, China
| | - Yuanhang Cheng
- School of New Energy, Nanjing University of Science and Technology, Jiangyin, Jiangsu, 21443, China
| | - Sai-Wing Tsang
- Department of Materials Science and Engineering, Center of Super-Diamond and Advance Films (COSDAF), Hong Kong Institute for Clean Energy, City University of Hong Kong, Hong Kong SAR, China
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3
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Péan E, Davies ML. PEARS: A Web Tool for Fitting Time-Resolved Photoluminescence Decays of Perovskite Materials. J Chem Inf Model 2023; 63:4477-4482. [PMID: 37463067 PMCID: PMC10428210 DOI: 10.1021/acs.jcim.3c00217] [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: 02/13/2023] [Indexed: 07/20/2023]
Abstract
Time-resolved photoluminescence (TRPL) is a powerful tool to investigate charge carrier recombination processes in emissive materials. Perovskite materials are extremely promising for applications in solar cells; however, the interpretation of their TRPL is arduous due to the complicated nature of the recombination processes occurring in these materials. We present here the PErovskite cArrier Recombination Simulator (PEARS) web tool for effortlessly and quickly fitting TRPL of perovskite materials using advanced charge carrier recombination models, allowing for the extraction of recombination rate constants and trap state concentration. PEARS is flexible and can adapt to different situations, by ignoring recombination processes or fixing known parameters (e.g., the doping concentration). The tool is publicly available at https://pears-tool.herokuapp.com.
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Affiliation(s)
- Emmanuel
V. Péan
- SPECIFIC
IKC, Materials Research Centre, College of Engineering, Swansea University Bay Campus, Fabian Way SA1 8EN, Swansea, U.K.
| | - Matthew L. Davies
- SPECIFIC
IKC, Materials Research Centre, College of Engineering, Swansea University Bay Campus, Fabian Way SA1 8EN, Swansea, U.K.
- School
of Chemistry and Physics, University of
KwaZulu-Natal, Durban 03209, RSA
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4
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Luan F, Li H, Gong S, Chen X, Shou C, Wu Z, Xie H, Yang S. Precursor engineering for efficient and stable perovskite solar cells. NANOTECHNOLOGY 2022; 34:055402. [PMID: 36322962 DOI: 10.1088/1361-6528/ac9f4f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
The perovskite film prepared by the two-step spin coating method is widely used in photovoltaic devices due to its good film morphology and great reproducibility. However, there usually exists excessive lead iodide (PbI2) in the perovskite film for this method, which is believed to passivate the grain boundaries (GBs) to increase the efficiency of the perovskite solar cells. Nevertheless, the excessive PbI2at the GBs of perovskite is believed to induce the decomposition of the perovskite film and undermine the long-term stability of devices. In this study, we utilize precursor engineering to realize the preparation of perovskite solar cells with high efficiency and stability. The concentration of organic salts (AX: A = MA+, FA+; X = I-, Cl-) in the precursor solution for the second step of the two-step spin coating method is adjusted to optimize the perovskite light-absorbing layer so that the excessive PbI2is converted into perovskite to obtain a smooth and pinhole-free perovskite film with high performance. Our results indicate that by adjusting the concentration of AX in the precursor solution, PbI2in the film could be completely converted into perovskite without excessive AX residue. Both the efficiency and stability of the perovskite solar cells without excessive PbI2have been significantly improved. A planar perovskite solar cell with the highest power conversion efficiency (PCE) of 21.26% was achieved, maintaining about 90% of the initial PCE after 300 h of storage in a dry air environment and in the dark, about 76% of the initial PCE after 300 h of continuous illumination of 1 Sun.
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Affiliation(s)
- Fuyuan Luan
- School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
- CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 588 Heshuo Road, Shanghai 201899, People's Republic of China
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai 201209, People's Republic of China
| | - Haiyan Li
- CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 588 Heshuo Road, Shanghai 201899, People's Republic of China
| | - Shuiping Gong
- CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 588 Heshuo Road, Shanghai 201899, People's Republic of China
| | - Xinyu Chen
- CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 588 Heshuo Road, Shanghai 201899, People's Republic of China
| | - Chunhui Shou
- Key Laboratory of Solar Energy Utilization & Energy Saving Technology of Zhejiang Province, Zhejiang Energy Group R&D, Hangzhou, Zhejiang 310003, People's Republic of China
| | - Zihua Wu
- School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai 201209, People's Republic of China
| | - Huaqing Xie
- School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
- Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai 201209, People's Republic of China
| | - Songwang Yang
- School of Energy and Materials, Shanghai Polytechnic University, Shanghai 201209, People's Republic of China
- CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 588 Heshuo Road, Shanghai 201899, People's Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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5
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Yoon B, Park CS, Song HJ, Kwak J, Lee SS, Lee H. Perovskite solar cells integrated with blue cut-off filters for mitigating light-induced degradation. OPTICS EXPRESS 2022; 30:31367-31380. [PMID: 36242220 DOI: 10.1364/oe.465848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 07/26/2022] [Indexed: 06/16/2023]
Abstract
The stability of methylammonium (MA)-based perovskite solar cells (PSCs) remains one of the most urgent issues that need to be addressed. Inherent weak binding forces between MAs and halides cause the perovskite structure to become unstable under exposure to various external environmental factors such as moisture, oxygen, ultraviolet radiation, and heat. In particular, the degradation of perovskite films under light exposure accelerates the deterioration of the device, mainly due to the migration of halide ions. In this study, we investigated the effect of light energy on the degradation of inverted PSCs by introducing red ( = 610-800 nm), green (500-590 nm), and blue (300-500 nm) light-pass filters. After 30 h, the inverted PSCs of blue-light-induced devices retained a power conversion efficiency (PCE) of 70%, while those of the green and red light-induced devices retained PCEs of 85% and 90%, respectively. Direct evidence of light-induced degradation was obtained by investigating morphological changes in the perovskite films and the amount of ion accumulation on the Ag electrode. This evidence highlights the varying effect of light with different energies on device degradation. Furthermore, to minimize light-induced device degradation, we designed two types of blue cut-off filters that can selectively block light ranging from = 400 to 500 nm, comprising a multilayered inorganic metasurface. An optical simulation was used to optimize the performance of the designed filters. By investigating the changes in the photovoltaic parameters and the amount of ion accumulation on the Ag electrode, we confirmed that integrating blue cut-off filters into PSCs greatly improved the operational lifetime of the devices.
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6
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Li Z, Zheng X, Xiao X, An Y, Wang Y, Huang Q, Li X, Cheacharoen R, An Q, Rong Y, Wang T, Xu H. Beyond the Phase Segregation: Probing the Irreversible Phase Reconstruction of Mixed-Halide Perovskites. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103948. [PMID: 34923773 PMCID: PMC8844510 DOI: 10.1002/advs.202103948] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 12/02/2021] [Indexed: 05/26/2023]
Abstract
Mixed-halide perovskites can undergo a photoinduced phase segregation. Even though many reports have claimed that such a phase segregation process is reversible, what happens after phase segregation and its impact on the performance of perovskite-based devices are still open questions. Here, the phase transformation of MAPb(I1- x Brx )3 after phase segregation and probe an irreversible phase reconstruction of MAPbBr3 is investigated. The photoluminescence imaging microscopy technique is introduced to in situ record the whole process. It is proposed that the type-I band alignment of segregated I-rich and Br-rich domains can enhance the emission of the I-rich domains by suppressing the nonradiative recombination channels. At the same time, the charge injection from Br-rich to I-rich domains drives the expulsion of iodide from the lattice, and thus triggers the reconstruction of MAPbBr3 . The work highlights the significance of ion movements in mixed-halide perovskites and provides new perspectives to understand the property evolution.
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Affiliation(s)
- Zhe Li
- School of Physics and Technology and Key Laboratory of Artificial Micro‐ and Nanostructures of Ministry of EducationWuhan UniversityWuhan430072China
| | - Xin Zheng
- Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan430074China
| | - Xuan Xiao
- Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan430074China
| | - Yongkang An
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhanHubei430070China
| | - Yanbo Wang
- State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai200240China
| | - Qingyi Huang
- Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan430074China
| | - Xiong Li
- Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan430074China
| | - Rongrong Cheacharoen
- Metallurgy and Materials Science Research InstituteChulalongkorn UniversityBangkok10330Thailand
| | - Qinyou An
- State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhanHubei430070China
| | - Yaoguang Rong
- Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan430074China
| | - Ti Wang
- School of Physics and Technology and Key Laboratory of Artificial Micro‐ and Nanostructures of Ministry of EducationWuhan UniversityWuhan430072China
| | - Hongxing Xu
- School of Physics and Technology and Key Laboratory of Artificial Micro‐ and Nanostructures of Ministry of EducationWuhan UniversityWuhan430072China
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7
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Triolo C, De Giorgi ML, Lorusso A, Cretì A, Santangelo S, Lomascolo M, Anni M, Mazzeo M, Patané S. Light Emission Properties of Thermally Evaporated CH 3NH 3PbBr 3 Perovskite from Nano- to Macro-Scale: Role of Free and Localized Excitons. NANOMATERIALS 2022; 12:nano12020211. [PMID: 35055230 PMCID: PMC8779009 DOI: 10.3390/nano12020211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/03/2022] [Accepted: 01/07/2022] [Indexed: 02/04/2023]
Abstract
Over the past decade, interest about metal halide perovskites has rapidly increased, as they can find wide application in optoelectronic devices. Nevertheless, although thermal evaporation is crucial for the development and engineering of such devices based on multilayer structures, the optical properties of thermally deposited perovskite layers (spontaneous and amplified spontaneous emission) have been poorly investigated. This paper is a study from a nano- to micro- and macro-scale about the role of light-emitting species (namely free carriers and excitons) and trap states in the spontaneous emission of thermally evaporated thin layers of CH3NH3PbBr3 perovskite after wet air UV light trap passivation. The map of light emission from grains, carried out by SNOM at the nanoscale and by micro-PL techniques, clearly indicates that free and localized excitons (EXs) are the dominant light-emitting species, the localized excitons being the dominant ones in the presence of crystallites. These species also have a key role in the amplified spontaneous emission (ASE) process: for higher excitation densities, the relative contribution of localized EXs basically remains constant, while a clear competition between ASE and free EXs spontaneous emission is present, which suggests that ASE is due to stimulated emission from the free EXs.
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Affiliation(s)
- Claudia Triolo
- Department of Civil, Energy, Environmental and Materials Engineering (DICEAM), Mediterranean University, 89122 Reggio Calabria, Italy;
- Correspondence: (C.T.); (M.A.)
| | - Maria Luisa De Giorgi
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, 73100 Lecce, Italy; (M.L.D.G.); (A.L.); (M.M.)
| | - Antonella Lorusso
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, 73100 Lecce, Italy; (M.L.D.G.); (A.L.); (M.M.)
| | - Arianna Cretì
- IMM-CNR Institute for Microelectronic and Microsystems, Via per Monteroni, 73100 Lecce, Italy; (A.C.); (M.L.)
| | - Saveria Santangelo
- Department of Civil, Energy, Environmental and Materials Engineering (DICEAM), Mediterranean University, 89122 Reggio Calabria, Italy;
| | - Mauro Lomascolo
- IMM-CNR Institute for Microelectronic and Microsystems, Via per Monteroni, 73100 Lecce, Italy; (A.C.); (M.L.)
| | - Marco Anni
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, 73100 Lecce, Italy; (M.L.D.G.); (A.L.); (M.M.)
- Correspondence: (C.T.); (M.A.)
| | - Marco Mazzeo
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, 73100 Lecce, Italy; (M.L.D.G.); (A.L.); (M.M.)
- CNR NANOTEC—Institute of Nanotechnology, 73100 Lecce, Italy
| | - Salvatore Patané
- Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, 98166 Messina, Italy;
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8
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Bieber AS, VanOrman ZA, Drozdick HK, Weiss R, Wieghold S, Nienhaus L. Mixed halide bulk perovskite triplet sensitizers: Interplay between band alignment, mid-gap traps, and phonons. J Chem Phys 2021; 155:234706. [PMID: 34937353 DOI: 10.1063/5.0077439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Photon upconversion, particularly via triplet-triplet annihilation (TTA), could prove beneficial in expanding the efficiencies and overall impacts of optoelectronic devices across a multitude of technologies. The recent development of bulk metal halide perovskites as triplet sensitizers is one potential step toward the industrialization of upconversion-enabled devices. Here, we investigate the impact of varying additions of bromide into a lead iodide perovskite thin film on the TTA upconversion process in the annihilator molecule rubrene. We find an interplay between the bromide content and the overall device efficiency. In particular, a higher bromide content results in higher internal upconversion efficiencies enabled by more efficient charge extraction at the interface likely due to a more favorable band alignment. However, the external upconversion efficiency decreases as the absorption cross section in the near infrared is reduced. The highest upconversion performance is found in our study for a bromide content of 5%. This result can be traced back to a high absorption cross section in the near infrared and higher photoluminescence quantum yield in comparison to the iodide-only perovskite and an increased driving force for charge transfer.
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Affiliation(s)
- Alexander S Bieber
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Zachary A VanOrman
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Hayley K Drozdick
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Rachel Weiss
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Sarah Wieghold
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
| | - Lea Nienhaus
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, USA
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9
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Oliveira RD, Mouquinho A, Centeno P, Alexandre M, Haque S, Martins R, Fortunato E, Águas H, Mendes MJ. Colloidal Lithography for Photovoltaics: An Attractive Route for Light Management. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1665. [PMID: 34202858 PMCID: PMC8307338 DOI: 10.3390/nano11071665] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 12/12/2022]
Abstract
The pursuit of ever-more efficient, reliable, and affordable solar cells has pushed the development of nano/micro-technological solutions capable of boosting photovoltaic (PV) performance without significantly increasing costs. One of the most relevant solutions is based on light management via photonic wavelength-sized structures, as these enable pronounced efficiency improvements by reducing reflection and by trapping the light inside the devices. Furthermore, optimized microstructured coatings allow self-cleaning functionality via effective water repulsion, which reduces the accumulation of dust and particles that cause shading. Nevertheless, when it comes to market deployment, nano/micro-patterning strategies can only find application in the PV industry if their integration does not require high additional costs or delays in high-throughput solar cell manufacturing. As such, colloidal lithography (CL) is considered the preferential structuring method for PV, as it is an inexpensive and highly scalable soft-patterning technique allowing nanoscopic precision over indefinitely large areas. Tuning specific parameters, such as the size of colloids, shape, monodispersity, and final arrangement, CL enables the production of various templates/masks for different purposes and applications. This review intends to compile several recent high-profile works on this subject and how they can influence the future of solar electricity.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Manuel J. Mendes
- CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, and CEMOP/UNINOVA, 2829-516 Caparica, Portugal; (R.D.O.); (P.C.); (M.A.); (S.H.); (R.M.); (E.F.); (H.Á.)
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10
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De Giorgi ML, Milanese S, Klini A, Anni M. Environment-Induced Reversible Modulation of Optical and Electronic Properties of Lead Halide Perovskites and Possible Applications to Sensor Development: A Review. Molecules 2021; 26:705. [PMID: 33572957 PMCID: PMC7866427 DOI: 10.3390/molecules26030705] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 01/22/2021] [Accepted: 01/23/2021] [Indexed: 11/30/2022] Open
Abstract
Lead halide perovskites are currently widely investigated as active materials in photonic and optoelectronic devices. While the lack of long term stability actually limits their application to commercial devices, several experiments demonstrated that beyond the irreversible variation of the material properties due to degradation, several possibilities exist to reversibly modulate the perovskite characteristics by acting on the environmental conditions. These results clear the way to possible applications of lead halide perovskites to resistive and optical sensors. In this review we will describe the current state of the art of the comprehension of the environmental effects on the optical and electronic properties of lead halide perovskites, and of the exploitation of these results for the development of perovskite-based sensors.
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Affiliation(s)
- Maria Luisa De Giorgi
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, Via per Arnesano, 73100 Lecce, Italy; (S.M.); (M.A.)
| | - Stefania Milanese
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, Via per Arnesano, 73100 Lecce, Italy; (S.M.); (M.A.)
| | - Argyro Klini
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, P.O. Box 1385, Heraklion, 71110 Crete, Greece;
| | - Marco Anni
- Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, Via per Arnesano, 73100 Lecce, Italy; (S.M.); (M.A.)
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11
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Affiliation(s)
- Xiongjian Huang
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
| | - Guoping Dong
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Liming Ding
- Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China.
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12
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Erazo EA, Sánchez-Godoy H, Gualdrón-Reyes AF, Masi S, Mora-Seró I. Photo-Induced Black Phase Stabilization of CsPbI 3 QDs Films. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1586. [PMID: 32806684 PMCID: PMC7466586 DOI: 10.3390/nano10081586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/04/2020] [Accepted: 08/10/2020] [Indexed: 01/22/2023]
Abstract
α-CsPbI3 quantum dots (QDs) show outstanding photoelectrical properties that had been harnessed in the fabrication of perovskite QDs solar cells. Nevertheless, the stabilization of the CsPbI3 perovskite cubic phase remains a challenge due to its own thermodynamic and the presence of surface defects. Herein, we report the optimization of the CsPbI3 QDs solar cells, by monitoring the structure, the morphology and the optoelectronic properties after a precise treatment, consisting of the conventional solvent washing with a time limited ultraviolet (UV) exposure combination, during the layer-by-layer deposition. The UV treatment compensates the defects coming from the essential but deleterious washing treatment. The material is stable for 200 h and the PCE improved by the 25% compared with that of the device without UV treatment. The photo-enhanced ion mobility mechanism is discussed as the main process for the CsPbI3 QDs and solar cell stability.
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Affiliation(s)
- Eider A. Erazo
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castellón de la Plana, Spain; (E.A.E.); (H.E.S.-G.); (A.F.G.-R.)
- Departamento de Química, Universidad de los Andes, Bogotá D.C. 111711, Colombia
| | - H.E. Sánchez-Godoy
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castellón de la Plana, Spain; (E.A.E.); (H.E.S.-G.); (A.F.G.-R.)
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno, Jalisco C.P. 47460, Mexico
| | - Andrés F. Gualdrón-Reyes
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castellón de la Plana, Spain; (E.A.E.); (H.E.S.-G.); (A.F.G.-R.)
| | - Sofia Masi
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castellón de la Plana, Spain; (E.A.E.); (H.E.S.-G.); (A.F.G.-R.)
| | - Iván Mora-Seró
- Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castellón de la Plana, Spain; (E.A.E.); (H.E.S.-G.); (A.F.G.-R.)
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13
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Lao X, Bao Y, Xu S. Impact of excitation energy on the excitonic luminescence of cesium lead bromide perovskite nanosheets. OPTICS LETTERS 2020; 45:3881-3884. [PMID: 32667309 DOI: 10.1364/ol.395119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
An excitation-energy-dependent luminescence phenomenon is reported in cesium lead bromide (CsPbBr3) perovskite nanosheets. At 10 K, the relative integrated luminescence intensity between the trapped exciton (TX) emission and the free exciton (FX) emission shows an interesting tendency with increasing the optical excitation energy from 2.431 eV (510 nm) to 3.758 eV (330 nm). To interpret such phenomenon, we develop a quantitative model on the basis of the biological population growth theory. A good agreement between experiment and theory is obtained. It is thus revealed that the lower capture coefficient of the TX level to the excited excitons via multiphonon emission relative to the FX level shall be the major cause of the observed phenomenon. These findings may help to deepen the current understanding of the complex luminescence mechanisms of these emerging light-emitting materials.
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14
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Saris S, Dona ST, Niemann V, Loiudice A, Buonsanti R. Optimizing the Atomic Layer Deposition of Alumina on Perovskite Nanocrystal Films by Using O
2
As a Molecular Probe. Helv Chim Acta 2020. [DOI: 10.1002/hlca.202000055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Seryio Saris
- Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne (EPFL) Valais CH-1950 Sion Switzerland
| | - Sanduni T. Dona
- Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne (EPFL) Valais CH-1950 Sion Switzerland
| | - Valerie Niemann
- Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne (EPFL) Valais CH-1950 Sion Switzerland
| | - Anna Loiudice
- Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne (EPFL) Valais CH-1950 Sion Switzerland
| | - Raffaella Buonsanti
- Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de Lausanne (EPFL) Valais CH-1950 Sion Switzerland
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15
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Investigation of the Role of the Environment on the Photoluminescence and the Exciton Relaxation of CsPbBr3 Nanocrystals Thin Films. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10062148] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this work, we present a detailed optical investigation of the effects of the environment on the photoluminescence (PL) spectra and the relaxation dynamics of pristine and aged CsPbBr3 nanocrystal (NC) thin films. We demonstrate that, contrary to previous results on similar NCs, the PL intensity of pristine NCs is higher when the sample is in wet air than in vacuum, due to the passivation of defects reducing the free exciton trapping and the bound excitons non-radiative relaxation. The aged NCs show a PL intensity increase in wet air nine times stronger than the pristine ones, due to an interplay between static and dynamic effects, increasing the number of emitting NCs and reducing the non-radiative recombination rate of free excitons. These results improve the understanding of the possible interactions between perovskite NCs and the environment, which could be relevant for the development of optical gas sensors exploiting perovskite NCs.
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16
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Wolff CM, Caprioglio P, Stolterfoht M, Neher D. Nonradiative Recombination in Perovskite Solar Cells: The Role of Interfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902762. [PMID: 31631441 DOI: 10.1002/adma.201902762] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/19/2019] [Indexed: 05/05/2023]
Abstract
Perovskite solar cells combine high carrier mobilities with long carrier lifetimes and high radiative efficiencies. Despite this, full devices suffer from significant nonradiative recombination losses, limiting their VOC to values well below the Shockley-Queisser limit. Here, recent advances in understanding nonradiative recombination in perovskite solar cells from picoseconds to steady state are presented, with an emphasis on the interfaces between the perovskite absorber and the charge transport layers. Quantification of the quasi-Fermi level splitting in perovskite films with and without attached transport layers allows to identify the origin of nonradiative recombination, and to explain the VOC of operational devices. These measurements prove that in state-of-the-art solar cells, nonradiative recombination at the interfaces between the perovskite and the transport layers is more important than processes in the bulk or at grain boundaries. Optical pump-probe techniques give complementary access to the interfacial recombination pathways and provide quantitative information on transfer rates and recombination velocities. Promising optimization strategies are also highlighted, in particular in view of the role of energy level alignment and the importance of surface passivation. Recent record perovskite solar cells with low nonradiative losses are presented where interfacial recombination is effectively overcome-paving the way to the thermodynamic efficiency limit.
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Affiliation(s)
- Christian M Wolff
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
| | - Pietro Caprioglio
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
- Helmholtz-Zentrum Berlin für Materialien und Energie, Young Investigator Group Perovskite Tandem Solar Cells, Kekuléstraße 5, 12489, Berlin, Germany
| | - Martin Stolterfoht
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
| | - Dieter Neher
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
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17
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De Giorgi ML, Krieg F, Kovalenko MV, Anni M. Amplified Spontaneous Emission Threshold Reduction and Operational Stability Improvement in CsPbBr 3 Nanocrystals Films by Hydrophobic Functionalization of the Substrate. Sci Rep 2019; 9:17964. [PMID: 31784597 PMCID: PMC6884571 DOI: 10.1038/s41598-019-54412-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 11/05/2019] [Indexed: 01/10/2023] Open
Abstract
The use of lead halide perovskites in optoelectronic and photonic devices is mainly limited by insufficient long-term stability of these materials. This issue is receiving growing attention, mainly owing to the operational stability improvement of lead halide perosvkites solar cells. On the contrary, fewer efforts are devoted to the stability improvement of light amplification and lasing. In this report we demonstrate that a simple hydrophobic functionalization of the substrates with hexamethyldisilazane (HMDS) allows to strongly improve the Amplified Spontaneous Emission (ASE) properties of drop cast CsPbBr3 nanocrystal (NC) thin films. In particular we observe an ASE threshold decrease down to 45% of the value without treatment, an optical gain increase of up to 1.5 times and an ASE operational stability increase of up to 14 times. These results are ascribed to a closer NC packing in the films on HMDS treated substrate, allowing an improved energy transfer towards the larger NCs within the NC ensemble, and to the reduction of the film interaction with moisture. Our results propose hydrophobic functionalization of the substrates as an easy approach to lower the ASE and lasing thresholds, while simultaneously increasing the active material stability.
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Affiliation(s)
- Maria Luisa De Giorgi
- Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento, Via per Arnesano, 73100, Lecce, Italy
| | - Franziska Krieg
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093, Zürich, Switzerland.,Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600, Dübendorf, Switzerland
| | - Maksym V Kovalenko
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093, Zürich, Switzerland.,Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600, Dübendorf, Switzerland
| | - Marco Anni
- Dipartimento di Matematica e Fisica "Ennio De Giorgi", Università del Salento, Via per Arnesano, 73100, Lecce, Italy.
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18
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Chouhan L, Ghimire S, Biju V. Blinking Beats Bleaching: The Control of Superoxide Generation by Photo‐ionized Perovskite Nanocrystals. Angew Chem Int Ed Engl 2019; 58:4875-4879. [DOI: 10.1002/anie.201900061] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Lata Chouhan
- Research Institute for Electronic Science and Graduate School of Environmental ScienceHokkaido University Sapporo Hokkaido 001-0020 Japan
| | - Sushant Ghimire
- Research Institute for Electronic Science and Graduate School of Environmental ScienceHokkaido University Sapporo Hokkaido 001-0020 Japan
| | - Vasudevanpillai Biju
- Research Institute for Electronic Science and Graduate School of Environmental ScienceHokkaido University Sapporo Hokkaido 001-0020 Japan
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19
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Chouhan L, Ghimire S, Biju V. Blinking Beats Bleaching: The Control of Superoxide Generation by Photo‐ionized Perovskite Nanocrystals. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lata Chouhan
- Research Institute for Electronic Science and Graduate School of Environmental ScienceHokkaido University Sapporo Hokkaido 001-0020 Japan
| | - Sushant Ghimire
- Research Institute for Electronic Science and Graduate School of Environmental ScienceHokkaido University Sapporo Hokkaido 001-0020 Japan
| | - Vasudevanpillai Biju
- Research Institute for Electronic Science and Graduate School of Environmental ScienceHokkaido University Sapporo Hokkaido 001-0020 Japan
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20
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Pfingsten O, Klein J, Protesescu L, Bodnarchuk MI, Kovalenko MV, Bacher G. Phonon Interaction and Phase Transition in Single Formamidinium Lead Bromide Quantum Dots. NANO LETTERS 2018; 18:4440-4446. [PMID: 29916252 DOI: 10.1021/acs.nanolett.8b01523] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Formamidinium lead bromide (FAPbBr3) quantum dots (QDs) are promising materials for light emitting applications in the visible spectral region because of their high photoluminescence (PL) quantum yield (QY) and the enhanced chemical stability as compared to, for instance, methylammonium based analogues. Toward practical harnessing of their compelling optical characteristics, the exciton recombination process, and in particular the exciton-phonon interaction and the impact of crystal phase transition, has to be understood in detail. This is addressed in this contribution by PL studies on single colloidal FAPbBr3 QDs. Polarization-resolved PL measurements reveal a fine structure splitting of excitonic transitions due to the Rashba effect. Distinct phonon replica have been observed within energetic distances of 4.3 ± 0.5, 8.6 ± 0.9, and 13.2 ± 1.1 meV from the zero phonon line, which we attribute to vibrational modes of the lead bromide lattice. Additional vibrational modes of 18.6 ± 0.3 and 38.8 ± 1.1 meV are found and related to liberation modes of the formamidinium (FA) cation. Temperature-dependent PL spectra reveal a line broadening of the emission caused by exciton phonon interaction as well an unusual energy shift which is attributed to a crystal phase transition within the single QD.
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Affiliation(s)
- Oliver Pfingsten
- Werkstoffe der Elektrotechnik and CENIDE , Universität Duisburg-Essen , Bismarckstraße 81 , 47057 Duisburg , Germany
| | - Julian Klein
- Werkstoffe der Elektrotechnik and CENIDE , Universität Duisburg-Essen , Bismarckstraße 81 , 47057 Duisburg , Germany
| | - Loredana Protesescu
- Laboratory for Thin Films and Photovoltaics , Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
| | - Maryna I Bodnarchuk
- Laboratory for Thin Films and Photovoltaics , Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Maksym V Kovalenko
- Laboratory for Thin Films and Photovoltaics , Empa - Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
| | - Gerd Bacher
- Werkstoffe der Elektrotechnik and CENIDE , Universität Duisburg-Essen , Bismarckstraße 81 , 47057 Duisburg , Germany
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