1
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Chen X, Huang Y, Deng Z, Zhao H, Ma F, Zhang J, Wei X. The strain regulated physical properties of PbI 2/g-C 3N 4for potential optoelectronic device. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:255704. [PMID: 38484393 DOI: 10.1088/1361-648x/ad33ef] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 03/14/2024] [Indexed: 03/28/2024]
Abstract
The van der Waals (vdW) heterostructures of Z-scheme PbI2/g-C3N4with an indirect bandgap have gained much attention in recent years due to their unique properties and potential applications in various fields. However, the optoelectronic characteristics and strain-modulated effects are not yet fully understood. By considering this, six stacking models of PbI2/g-C3N4are proposed and the stablest structure is selected for further investigation. The uniaxial and biaxial strains (-10%-10%) regulated band arrangement, charge distribution, optical absorption in the framework of density functional theory are systematically explored. The compressive uniaxial strain of -8.55% changes the band type from II→I, and the biaxial strains of -7.12%, -5.25%, 8.91% change the band type in a way of II→I→II→I, acting like the 'band-pass filter'. The uniaxial strains except -10% compressive strain, and the -6%, -4%, 2%, 4%, 10% biaxial strains will enhance the light absorption of PbI2/g-C3N4. The exerted strains on PbI2/g-C3N4generate different power conversion efficiency (ηPCE) values ranging from 3.64% to 25.61%, and the maximumηPCEis generated by -6% biaxial strain. The results of this study will pave the way for the development of new electronic and optoelectronic materials with customized properties in photocatalytic field and optoelectronic devices.
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Affiliation(s)
- Xiunan Chen
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
| | - Yuhong Huang
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
| | - Zunyi Deng
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, Beijing, People's Republic of China
| | - Haili Zhao
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, People's Republic of China
| | - Fei Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China
| | - Jianmin Zhang
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
| | - Xiumei Wei
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
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2
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Intan NN, Pfaendtner J. Role of Surface Features on the Initial Dissolution of CH 3NH 3PbI 3 Perovskite in Liquid Water: An Ab Initio Molecular Dynamics Study. ACS NANO 2023; 17:22371-22387. [PMID: 37943082 DOI: 10.1021/acsnano.3c04601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
The degradation of CH3NH3PbI3 (MAPbI3) hybrid organic inorganic perovskite (HOIP) by water has been the major issue hampering its use in commercial perovskites solar cells (PSCs), as MAPbI3 HOIP has been known to easily degrade in the presence of water. Even though there have been numerous studies investigating this phenomenon, there is still no consensus on the mechanisms of the initial stages of dissolution. Here, we attempt to consolidate differing mechanistic interpretations previously reported in the literature through the use of the first-principles constrained ab initio molecular dynamics (AIMD) to study both the energetics and mechanisms that accompany the degradation of MAPbI3 HOIP in liquid water. By comparing the dissolution free energy barrier between surface species of different surficial types, we find that the dominant dissolution mechanisms of surface species vary widely based on the specific surface features. The high sensitivity of the dissolution mechanism to surface features has contributed to the many dissolution mechanisms proposed in the literature. In contrast, the dissolution free energy barriers are mainly determined by the dissolving species rather than the type of surfaces, and the type of surfaces the ions are dissolving from is inconsequential toward the dissolution free energy barrier. However, the presence of surface defects such as vacancy sites is found to significantly lower the dissolution free energy barriers. Based on the estimated dissolution free energy barriers, we propose that the dissolution of MAPbI3 HOIP in liquid water originates from surface defect sites that propagate laterally along the surface layer of the MAPbI3 HOIP crystal.
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Affiliation(s)
- Nadia N Intan
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Jim Pfaendtner
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
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3
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Alias N, Ali Umar A, Sadikin SN, Ridwan J, Hamzah AA, Ali Umar MI, Ehsan AA, Nurdin M, Zhan Y. Air-Processable Perovskite Solar Cells by Hexamine Molecule Phase Stabilization. ACS OMEGA 2023; 8:18874-18881. [PMID: 37273642 PMCID: PMC10233683 DOI: 10.1021/acsomega.3c01236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 04/11/2023] [Indexed: 06/06/2023]
Abstract
Perovskite solar cells have emerged as a potential energy alternative due to their low cost of fabrication and high power conversion efficiency. Unfortunately, their poor ambient stability has critically limited their industrialization and application in real environmental conditions. Here, we show that by introducing hexamine molecules into the perovskite lattice, we can enhance the photoactive phase stability, enabling high-performance and air-processable perovskite solar cells. The unencapsulated and freshly prepared perovskite solar cells produce a power conversion efficiency of 16.83% under a 100 mW cm-2 1.5G solar light simulator and demonstrate high stability properties when being stored for more than 1500 h in humid air with relative humidity ranging from 65 to 90%. We envisage that our findings may revolutionize perovskite solar cell research, pushing the performance and stability to the limit and bringing the perovskite solar cells toward industrialization.
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Affiliation(s)
- Nabilah Alias
- Institute
of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, UKM, 43600 Bangi, Selangor, Malaysia
| | - Akrajas Ali Umar
- Institute
of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, UKM, 43600 Bangi, Selangor, Malaysia
| | - Siti Naqiyah Sadikin
- Institute
of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, UKM, 43600 Bangi, Selangor, Malaysia
| | - Jaenudin Ridwan
- Institute
of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, UKM, 43600 Bangi, Selangor, Malaysia
| | - Azrul Azlan Hamzah
- Institute
of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, UKM, 43600 Bangi, Selangor, Malaysia
| | - Marjoni Imamora Ali Umar
- Department
of Physics Education, Faculty of Tarbiyah, Universitas Islam Negeri Mahmud Yunus, Batusangkar 27213, Indonesia
| | - Abang Annuar Ehsan
- Institute
of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, UKM, 43600 Bangi, Selangor, Malaysia
| | - Muhammad Nurdin
- Department
of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo, Kendari 93132, Indonesia
| | - Yiqiang Zhan
- School
of Information Science and Technology, Fudan
University, 220 Handan Road, Shanghai 200437, P. R. China
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4
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Hou X, Zhang W, Li QS. Cooperative multiple interactions of donor-π-acceptor dyes enhance the efficiency and stability of perovskite solar cells. Phys Chem Chem Phys 2023; 25:13383-13392. [PMID: 37157860 DOI: 10.1039/d3cp00704a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Surface passivation by organic dyes has been an effective strategy for simultaneous enhancement of the efficiency and stability of perovskite solar cells. However, lack of in-depth understanding of how subtle structural changes in dyes leads to distinctly different passivation effects is a challenge for screening effective passivation molecules (PMs). In an experiment done by Han et al. (Adv. Energy Mater., 2019, 9, 1803766), three donor-π-acceptor (D-π-A) dyes (SP1, SP2, and SP3) with distinct electron donors have been applied to passivate the perovskite surface, where the efficiency and stability of PSCs are quite different. Herein, we carried out first-principles calculations and ab initio molecular dynamics (AIMD) simulations on the structures and electronic properties of SP1, SP2, SP3, and their passivated perovskite surfaces. Our results showed that SP3 enhances the carrier transfer rate, electric field, and absorption region compared to SP1 and SP2. Moreover, AIMD simulations reveal that the cooperative multiple interactions of O-Pb, S-Pb, and H-I between SP3 and the perovskite surface result in a stronger passivation effect in a humid environment than that of SP1 and SP2. This work is expected to pave the way for screening dye passivation molecules to endow perovskite solar cells with high efficiency and stability.
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Affiliation(s)
- Xiufang Hou
- Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan'an University, Yan'an, Shaanxi 716000, China.
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
| | - Weiyi Zhang
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
| | - Quan-Song Li
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
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5
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Kong L, Zhang X, Zhang C, Wang L, Wang S, Cao F, Zhao D, Rogach AL, Yang X. Stability of Perovskite Light-Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205217. [PMID: 35921550 DOI: 10.1002/adma.202205217] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Metal halide perovskites combine excellent electronic and optical properties, such as defect tolerance and high photoluminescence efficiency, with the benefits of low-cost, large-area, solution-based processing. Composition- and dimension-tunable properties of perovskites have already been utilized in bright and efficient light-emitting diodes (LEDs). At the same time, there are still great challenges ahead to achieving operational and spectral stability of these devices. In this review, the origins of instability of perovskite materials, and reasons for their degradation in LEDs are considered. Then, strategies for improving the stability of perovskite materials are reviewed, such as compositional engineering, dimensionality control, defect passivation, suitable encapsulation matrices, and fabrication of core/shell perovskite nanocrystals. For improvement of the operational stability of perovskite LEDs, the use of inorganic charge-transport layers, optimization of charge balance, and proper thermal management are considered. The review is concluded with a detailed account of the current challenges and a perspective on the key approaches and opportunities on how to reach the goal of stable, bright, and efficient perovskite LEDs.
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Affiliation(s)
- Lingmei Kong
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Xiaoyu Zhang
- College of Materials Science and Engineering, Jilin University, Changchun, 130012, P. R. China
| | - Chengxi Zhang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Lin Wang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Sheng Wang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Fan Cao
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Dewei Zhao
- College of Materials Science and Engineering, Engineering Research Center of Alternative Energy Materials & Devices (MoE), Sichuan University, Chengdu, 610065, P. R. China
| | - Andrey L Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Xuyong Yang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
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6
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Bao C, Gao F. Physics of defects in metal halide perovskites. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2022; 85:096501. [PMID: 35763940 DOI: 10.1088/1361-6633/ac7c7a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Metal halide perovskites are widely used in optoelectronic devices, including solar cells, photodetectors, and light-emitting diodes. Defects in this class of low-temperature solution-processed semiconductors play significant roles in the optoelectronic properties and performance of devices based on these semiconductors. Investigating the defect properties provides not only insight into the origin of the outstanding performance of perovskite optoelectronic devices but also guidance for further improvement of performance. Defects in perovskites have been intensely studied. Here, we review the progress in defect-related physics and techniques for perovskites. We survey the theoretical and computational results of the origin and properties of defects in perovskites. The underlying mechanisms, functions, advantages, and limitations of trap state characterization techniques are discussed. We introduce the effect of defects on the performance of perovskite optoelectronic devices, followed by a discussion of the mechanism of defect treatment. Finally, we summarize and present key challenges and opportunities of defects and their role in the further development of perovskite optoelectronic devices.
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Affiliation(s)
- Chunxiong Bao
- Department of Physics, Chemistry, and Biology, Linköping University, Sweden
- National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing, 210093, People's Republic of China
| | - Feng Gao
- Department of Physics, Chemistry, and Biology, Linköping University, Sweden
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7
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Howard JM, Wang Q, Srivastava M, Gong T, Lee E, Abate A, Leite MS. Quantitative Predictions of Moisture-Driven Photoemission Dynamics in Metal Halide Perovskites via Machine Learning. J Phys Chem Lett 2022; 13:2254-2263. [PMID: 35239346 DOI: 10.1021/acs.jpclett.2c00131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Metal halide perovskite (MHP) photovoltaics may become a viable alternative to standard Si-based technologies, but the current lack of long-term stability precludes their commercial adoption. Exposure to standard operational stressors (light, temperature, bias, oxygen, and water) often instigate optical and electronic dynamics, calling for a systematic investigation into MHP photophysical processes and the development of quantitative models for their prediction. We resolve the moisture-driven light emission dynamics for both methylammonium lead tribromide and triiodide thin films as a function of relative humidity (rH). With the humidity and photoluminescence time series, we train recurrent neural networks and establish their ability to quantitatively predict the path of future light emission with 18% error over 4 h. Together, our in situ rH-PL measurements and machine learning forecasting models provide a framework for the rational design of future stable perovskite devices and, thus, a faster transition toward commercial applications.
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Affiliation(s)
- John M Howard
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, United States
| | - Qiong Wang
- Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, 12489 Berlin, Germany
| | - Meghna Srivastava
- Department of Materials Science and Engineering, University of California, Davis, Davis, California 95616, United States
| | - Tao Gong
- Department of Materials Science and Engineering, University of California, Davis, Davis, California 95616, United States
- Department of Electrical and Computer Engineering, University of California, Davis, Davis, California 95616, United States
| | - Erica Lee
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
- Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, United States
| | - Antonio Abate
- Young Investigator Group Active Materials and Interfaces for Stable Perovskite Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, 12489 Berlin, Germany
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125 Fuorigrotta, Naples, Italy
| | - Marina S Leite
- Department of Materials Science and Engineering, University of California, Davis, Davis, California 95616, United States
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8
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Water-Assisted Perovskite Quantum Dots with High Optical Properties. TECHNOLOGIES 2022. [DOI: 10.3390/technologies10010011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lead halide perovskite quantum dots (PeQDs) have excellent optical properties, such as narrow emission spectra (FWHM: 18–30 nm), a tunable bandgap (λPL: 420–780 nm), and excellent photoluminescence quantum yields (PLQYs: >90%). PeQDs are known as a material that is easily decomposed when exposed to water in the atmosphere, resulting in causing PeQDs to lower performance. On the other hand, according to the recent reports, adding water after preparing the PeQD dispersion decomposed the PeQD surface defects, resulting in improving their PLQY. Namely, controlling the amount of assisting water during the preparation of the PeQDs is a significantly critical factor to determining their optical properties and device applications. In this paper, our research group discovered the novel effects of the small amount of water to their optical properties when preparing the PeQDs. According to the TEM Images, the PeQDs particle size was clearly increased after water-assisting. In addition, XPS measurement showed that the ratio of Br/Pb achieved to be close to three. Namely, by passivating the surface defect using Ostwald ripening, the prepared PeQDs achieved a high PLQY of over 95%.
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9
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Ioannou A, Vareli I, Kaltzoglou A, Koutselas I. Synthesis, characterization and optoelectronic properties of 2D hybrid RPbX4 semiconductors based on an isomer mixture of hexanediamine-based dications. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2021-0090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Three new hybrid two-dimensional (2D) organic–inorganic semiconductors are presented, which contain lead halides and a mixture of hexanediamine-based isomers in the stoichiometry [2,2,4(2,4,4)-trimethyl-1,6-hexanediamine]PbX4 (X = I, Br, Cl). These hexanediamine derivatives, with attached methyl groups at the carbon backbone of both isomers, determine the packing of the organic layers between the inorganic 2D sheets, while the optical absorption and photoluminescence spectra reveal excitonic peaks at T = 77 K and room temperature. The as-synthesized semiconductors were stored for three years in the dark and under low humidity and were examined again and the results were compared to those of the fresh materials. The chloride analogue, after the three year storage, displays white-like luminescence. The use of non-equivalent isomer and racemic mixtures in the organic component to form hybrid organic–inorganic semiconductors is an efficient method to alter the properties of 2D perovskites by tuning the isomers’ chemical functionalities. Finally, a comparison of the observed excitonic absorption and photoluminescence signals to that of analogous 2D compounds is discussed.
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Affiliation(s)
- Anna Ioannou
- Materials Science Department, School of Natural Sciences , University of Patras , Patras , 26504 , Greece
| | - Ioanna Vareli
- Materials Science Department, School of Natural Sciences , University of Patras , Patras , 26504 , Greece
- Department of Materials Science and Engineering , University of Ioannina , Ioannina , 45110 , Greece
| | - Andreas Kaltzoglou
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation , Athens , 11635 , Greece
| | - Ioannis Koutselas
- Materials Science Department, School of Natural Sciences , University of Patras , Patras , 26504 , Greece
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10
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Zhang B, Wang X, Yang Y, Hu B, Tong L, Liu Y, Zhao L, Lu Q. Sensing Mechanism of H 2O, NH 3, and O 2 on the Stability-Improved Cs 2Pb(SCN) 2Br 2 Surface: A Quantum Dynamics Investigation. ACS OMEGA 2021; 6:24244-24255. [PMID: 34568702 PMCID: PMC8459405 DOI: 10.1021/acsomega.1c03952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
Although the perovskite sensing materials have shown high sensitivity and ideal selectivity toward neutral, oxidative, or reductive gases, their structural instability hampers the practical application. To exploit perovskite-based gas-sensing materials with improved stability and decent sensitivity, three adsorption complexes of H2O, NH3, and O2 on the Cs2Pb(SCN)2Br2 surface are built by doping Br- and Cs+ in the parent (CH3NH3)2Pb(SCN)2I2 structure and submitted to quantum dynamics simulations. Changes in the semiconductor material geometric structures during these dynamic processes are analyzed and adsorption ability and charge transfer between Cs2Pb(SCN)2Br2 and the gas molecules are explored so as to further establish a correlation between the geometrical structure variations and the charge transfer. By comparing with the previous CH3NH3PbI3 and (CH3NH3)2Pb(SCN)2I2 adsorption systems, we propose the key factors that enhance the stability of perovskite structures in different atmospheres. The current work is expected to provide clues for developing innovative perovskite sensing materials or for constructing reasonable sensing mechanisms.
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Affiliation(s)
- Bing Zhang
- National
Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, 2 Beinong Road, Huilongguan Town, Changping District, Beijing 102206, P. R. China
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
- State
Key Laboratory of Alternate Electrical Power System with Renewable
Energy Sources, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
| | - Xiaogang Wang
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
| | - Yang Yang
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
| | - Bin Hu
- National
Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, 2 Beinong Road, Huilongguan Town, Changping District, Beijing 102206, P. R. China
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
- State
Key Laboratory of Alternate Electrical Power System with Renewable
Energy Sources, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
| | - Lei Tong
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
| | - Ying Liu
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
| | - Li Zhao
- National
Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, 2 Beinong Road, Huilongguan Town, Changping District, Beijing 102206, P. R. China
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
| | - Qiang Lu
- National
Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, 2 Beinong Road, Huilongguan Town, Changping District, Beijing 102206, P. R. China
- School
of New Energy, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
- State
Key Laboratory of Alternate Electrical Power System with Renewable
Energy Sources, North China Electric Power
University, 2 Beinong
Road, Huilongguan Town, Changping District, Beijing 102206, P. R.
China
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11
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Lei Y, Xu Y, Wang M, Zhu G, Jin Z. Origin, Influence, and Countermeasures of Defects in Perovskite Solar Cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2005495. [PMID: 33759357 DOI: 10.1002/smll.202005495] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/24/2020] [Indexed: 05/08/2023]
Abstract
Defects are considered to be one of the most significant factors that compromise the power conversion efficiencies and long-term stability of perovskite solar cells. Therefore, it is urgent to have a profound understanding of their formation and influence mechanism, so as to take corresponding measures to suppress or even completely eliminate their adverse effects on device performance. Herein, the possible origins of the defects in metal halide perovskite films and their impacts on the device performance are analyzed, and then various methods to reduce defect density are introduced in detail. Starting from the internal and interfacial aspects of the metal halide perovskite films, several ways to improve device performance and long-term stability including additive engineering, surface passivation, and other physical treatments (annealing engineering), etc., are further elaborated. Finally, the further understanding of defects and the development trend of passivation strategies are prospected.
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Affiliation(s)
- Yutian Lei
- School of Physical Science and Technology & Key Laboratory of Special Function Materials and Structure Design (MoE) & National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Youkui Xu
- School of Physical Science and Technology & Key Laboratory of Special Function Materials and Structure Design (MoE) & National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Meng Wang
- School of Physical Science and Technology & Key Laboratory of Special Function Materials and Structure Design (MoE) & National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Ge Zhu
- Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials & Devices of Liaoning Province, College of Physics and Materials Engineering, Dalian Minzu University, 18 Liaohe West Road, Dalian, 116600, China
| | - Zhiwen Jin
- School of Physical Science and Technology & Key Laboratory of Special Function Materials and Structure Design (MoE) & National & Local Joint Engineering Laboratory for Optical Conversion Materials and Technology, Lanzhou University, Lanzhou, 730000, China
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12
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Gao Y, Prodanov MF, Kang C, Vashchenko VV, Gupta SK, Chan CCS, Wong KS, Srivastava AK. Stable bright perovskite nanoparticle thin porous films for color enhancement in modern liquid crystal displays. NANOSCALE 2021; 13:6400-6409. [PMID: 33537691 DOI: 10.1039/d0nr07313j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cesium-lead halide perovskite nanoparticles are a promising class of luminescent materials for color and efficient displays. However, material stability is the key issue to solve before we can use these materials in modern displays. Encapsulation is one of the most efficient methods that can markedly improve the stability of perovskite nanoparticles against moisture, heat, oxygen, and light. Thus, we urgently need a low-cost, reliable, and device-compatible encapsulation method for the integration of nanomaterials into display devices. Here, we propose a facile encapsulation method to stabilize perovskite nanoparticles in thin polymer porous films. Using porous polymer films, we achieved good photoluminescence stability in the harsh environment of high temperature, high humidity and strong UV illumination. The good UV stability benefitted from the unique optical properties of the porous film. Besides, we observed photoluminescence enhancement of CsPbBr3 nanoparticle films in a high humidity environment. The stable CsPbBr3 nanoparticle thin porous film provides high brightness (236 nits) and great color enhancement for LCDs and is characterized by simple fabrication with easy scalability, thus it is very suitable for modern LCDs.
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Affiliation(s)
- Yiyang Gao
- State Key Laboratory of Advanced Displays and Optoelectronics Technologies, and Centre for Display Research, Department of Electronics and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong S.A.R, China.
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13
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Kheralla A, Chetty N. A review of experimental and computational attempts to remedy stability issues of perovskite solar cells. Heliyon 2021; 7:e06211. [PMID: 33644476 PMCID: PMC7895729 DOI: 10.1016/j.heliyon.2021.e06211] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/19/2020] [Accepted: 02/03/2021] [Indexed: 11/25/2022] Open
Abstract
Photovoltaic technology using perovskite solar cells has emerged as a potential solution in the photovoltaic makings for cost-effective manufacturing solutions deposition/coating solar cells. The hybrid perovskite-based materials possess a unique blend from low bulk snare concentrations, ambipolar, broad optical absorption properties, extended charge carrier diffusion, and charge transport/collection properties, making them favourable for solar cell applications. However, perovskite solar cells devices suffer from the effects of natural instability, leading to their rapid degradation while bared to water, oxygen, as well as ultraviolet rays, are irradiated and in case of high temperatures. It is essential to shield the perovskite film from damage, extend lifetime, and make it suitable for device fabrications. This paper focuses on various device strategies and computational attempts to address perovskite-based solar cells' environmental stability issues.
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Affiliation(s)
- Adam Kheralla
- School of Physics and Chemistry, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
| | - Naven Chetty
- School of Physics and Chemistry, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa
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14
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Liu Q, Liang W. How the Structures and Properties of Pristine and Anion Vacancy Defective Organic-Inorganic Hybrid Double Perovskites MA 2AgIn(Br xI 1-x) 6 Vary with Br Content x. J Phys Chem Lett 2020; 11:10315-10322. [PMID: 33227194 DOI: 10.1021/acs.jpclett.0c03137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This work is dedicated to theoretically investigating the mixed-halide direct band gap organic-inorganic hybrid double perovskites (OIHdPs), MA2AgIn(BrxI1-x)6, with and without anion vacancy point (AVP) defects. We calculate their structural and optoelectronic properties with different halide compositions and find that the effect of halide composition on the properties of MA2AgIn(BrxI1-x)6 is quite different from that on lead-bearing perovskites. All the vacancy-free I-bearing systems (x ≠ 1) have nearly the same direct band gap width and carrier activity with MAPbI3. The Br-rich systems (x > 0.50) are relatively thermodynamical stable and not prone to spontaneous anion segregation and show a strong "self-tolerance" feature toward the inherit defects as well. With these distinguished properties, we are able to conclude that MA2AgIn(BrxI1-x)6 with 0.50 < x < 1 are promising candidates for Pb-free photovoltaic materials. This Letter provides a detailed microscopic understanding of the vacancy-induced band distortion in lead-free heterovalent substitution OIHdPs and has some guiding significance for molecular design of nontoxic photovoltaic materials.
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Affiliation(s)
- Qi Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
| | - WanZhen Liang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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15
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Qiao L, Fang W, Long R. The Interplay Between Lead Vacancy and Water Rationalizes the Puzzle of Charge Carrier Lifetimes in CH
3
NH
3
PbI
3
: Time‐Domain Ab Initio Analysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lu Qiao
- College of Chemistry Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education Beijing Normal University Beijing 100875 P. R. China
| | - Wei‐Hai Fang
- College of Chemistry Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education Beijing Normal University Beijing 100875 P. R. China
| | - Run Long
- College of Chemistry Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education Beijing Normal University Beijing 100875 P. R. China
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16
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Xiao S, Zhang K, Zheng S, Yang S. Good or evil: what is the role of water in crystallization of organometal halide perovskites? NANOSCALE HORIZONS 2020; 5:1147-1154. [PMID: 32567637 DOI: 10.1039/d0nh00270d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Perovskite solar cells (PSCs) have the potential to become one of the most cost-efficient photovoltaic devices. However, current fabrication methods of PSCs still require strict environment control and ultrahigh purity chemicals, which could prevent their large-scale commercialization. To tackle this challenge, the role of water is the first to be thoroughly understood in a perovskite formation process. Until now, there is still controversy about whether water is harmful or beneficial for perovskite formation, not to mention exactly what role water plays therein. In this Focus article, we review recent studies on water involved chemical reactions, solvent interaction, intermediates, and crystal growth in the perovskite film formation process, in order to bring out a full picture about what water does in the perovskite formation process. As our current understanding stands, a suitable amount of water could be of help for growing high quality perovskite films due to the resultant formation of intermediates, such as MAPbI3·H2O, which facilitates the conversion from precursors to perovskites. However, too much water would induce the formation of relatively stable components, such as (MA)4PbI6·2H2O, which are left in the product-films as impurities resulting in degraded device performance. Continual efforts should be made to further understand and develop water-involved strategies for consistent PSC fabrication under ambient conditions.
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Affiliation(s)
- Shuang Xiao
- Guangdong Provincial Key Lab of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen, China.
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17
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Shangguan Z, Zheng X, Zhang J, Lin W, Guo W, Li C, Wu T, Lin Y, Chen Z. The Stability of Metal Halide Perovskite Nanocrystals-A Key Issue for the Application on Quantum-Dot-Based Micro Light-Emitting Diodes Display. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1375. [PMID: 32679801 PMCID: PMC7408616 DOI: 10.3390/nano10071375] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/04/2020] [Accepted: 07/09/2020] [Indexed: 12/24/2022]
Abstract
The metal halide perovskite nanocrystal (MHP-NC), an easy-to-fabricate and low cost fluorescent material, is recognized to be among the promising candidates of the color conversion material in the micro light-emitting diode (micro-LED) display, providing that the stability can be further enhanced. It is found that the water steam, oxygen, thermal radiation and light irradiation-four typical external factors in the ambient environment related to micro-LED display-can gradually alter and destroy the crystal lattice. Despite the similar phenomena of photoluminescence quenching, the respective encroaching processes related to these four factors are found to be different from one another. The encroaching mechanisms are collected and introduced in separate categories with respect to each external factor. Thereafter, a combined effect of these four factors in an environment mimicking real working conditions of micro-LED display are also introduced. Finally, recent progress on the full-color application of MHP-NC is also reviewed in brief.
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Affiliation(s)
| | | | | | | | | | - Cheng Li
- School of Electronic Science and Engineering, Xiamen University, Xiamen 361005, Fujian, China; (Z.S.); (X.Z.); (J.Z.); (W.L.); (W.G.); (Z.C.)
| | - Tingzhu Wu
- School of Electronic Science and Engineering, Xiamen University, Xiamen 361005, Fujian, China; (Z.S.); (X.Z.); (J.Z.); (W.L.); (W.G.); (Z.C.)
| | - Yue Lin
- School of Electronic Science and Engineering, Xiamen University, Xiamen 361005, Fujian, China; (Z.S.); (X.Z.); (J.Z.); (W.L.); (W.G.); (Z.C.)
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18
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Geng W, Tong C, Zhang Y, Liu L. Theoretical Progress on the Relationship between the Structures and Properties of Perovskite Solar Cells. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Wei Geng
- Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
- School of Physics Beihang University Beijing 100191 China
| | - Chuan‐Jia Tong
- School of Physics Beihang University Beijing 100191 China
| | - Yanning Zhang
- Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
| | - Li‐Min Liu
- School of Physics Beihang University Beijing 100191 China
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19
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Qiao L, Fang W, Long R. The Interplay Between Lead Vacancy and Water Rationalizes the Puzzle of Charge Carrier Lifetimes in CH
3
NH
3
PbI
3
: Time‐Domain Ab Initio Analysis. Angew Chem Int Ed Engl 2020; 59:13347-13353. [DOI: 10.1002/anie.202004192] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/21/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Lu Qiao
- College of Chemistry Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education Beijing Normal University Beijing 100875 P. R. China
| | - Wei‐Hai Fang
- College of Chemistry Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education Beijing Normal University Beijing 100875 P. R. China
| | - Run Long
- College of Chemistry Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education Beijing Normal University Beijing 100875 P. R. China
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20
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Zhou H, Wang J, Wang M, Lin S. Competing Dissolution Pathways and Ligand Passivation-Enhanced Interfacial Stability of Hybrid Perovskites with Liquid Water. ACS APPLIED MATERIALS & INTERFACES 2020; 12:23584-23594. [PMID: 32326693 DOI: 10.1021/acsami.0c03532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Material instability issues, especially moisture degradation in ambient operating environments, limit the practical application of hybrid perovskite in photovoltaic and light-emitting devices. Very recent experiments demonstrate that ligand passivation can effectively improve the surface moisture tolerance of hybrid perovskites. In this work, the interfacial stability of as-synthesized pristine and alkylammonium-passivated methylammonium lead iodide (MAPbI3) with liquid water is systematically investigated using molecular dynamics simulations and reaction kinetics models. Interestingly, the more hydrophilic [PbI2]0 surface is more stable than the less hydrophilic [MAI]0 surface because of the higher polarity of the former surface. Linear alkylammoniums significantly stabilize the [MAI]0 surface with highly reduced (by 1-2 orders of magnitude) dissociation rates of both MA+ and ligands themselves, while branched ligands, surprisingly, lead to higher dissociation rates as the surface coverage increases. Such anomalous behavior is attributed to the aggregation-assisted dissolution of surfactant-like ligands as micelles during the degradation process. Short-chain linear alkylammonium at the full surface coverage is found to be the optimal ligand to stabilize the [MAI]0 surface. This work not only provides fundamental insights into the ionic dissolution pathways and mechanisms of hybrid perovskites in water but also inspires the design of highly stable hybrid perovskites with ligand passivation layers. The computational framework developed here is also transferrable to the investigation of surface passivation chemistry for weak ionic materials in general.
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Affiliation(s)
- Huanhuan Zhou
- Department of Mechanical Engineering, Materials Science and Engineering Program, FAMU-FSU College of Engineering, Florida State University, Tallahassee, Florida 32310, United States
| | - Jingfan Wang
- Department of Mechanical Engineering, Materials Science and Engineering Program, FAMU-FSU College of Engineering, Florida State University, Tallahassee, Florida 32310, United States
| | - Mingchao Wang
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Shangchao Lin
- Institute of Engineering Thermophysics, School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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21
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Vapor-Phase Photocatalytic Overall Water Splitting Using Hybrid Methylammonium Copper and Lead Perovskites. NANOMATERIALS 2020; 10:nano10050960. [PMID: 32443491 PMCID: PMC7279556 DOI: 10.3390/nano10050960] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 04/18/2020] [Accepted: 04/22/2020] [Indexed: 11/25/2022]
Abstract
Films or powders of hybrid methylammonium copper halide perovskite exhibit photocatalytic activity for overall water splitting in the vapor phase in the absence of any sacrificial agent, resulting in the generation of H2 and O2, reaching a maximum production rate of 6 μmol H2 × g cat−1h−1 efficiency. The photocatalytic activity depends on the composition, degreasing all inorganic Cs2CuCl2Br2 perovskite and other Cl/Br proportions in the methylammonium hybrids. XRD indicates that MA2CuCl2Br2 is stable under irradiation conditions in agreement with the linear H2 production with the irradiation time. Similar to copper analogue, hybrid methylammonium lead halide perovskites also promote the overall photocatalytic water splitting, but with four times less efficiency than the Cu analogues. The present results show that, although moisture is strongly detrimental to the photovoltaic applications of hybrid perovskites, it is still possible to use these materials as photocatalysts for processes requiring moisture due to the lack of relevance in the photocatalytic processes of interparticle charge migration.
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22
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Nan G, Beljonne D, Zhang X, Quarti C. Organic Cations Protect Methylammonium Lead Iodide Perovskites against Small Exciton-Polaron Formation. J Phys Chem Lett 2020; 11:2983-2991. [PMID: 32227856 DOI: 10.1021/acs.jpclett.0c00673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Working organic-inorganic lead halide perovskite-based devices are notoriously sensitive to surface and interface effects. Using a combination of density functional theory (DFT) and time-dependent DFT methods, we report a comprehensive study of the changes (with respect to the bulk) in geometric and electronic structures going on at the (001) surface of a (tetragonal phase) methylammonium lead iodide perovskite slab, in the dark and upon photoexcitation. The formation of a hydrogen bonding pattern between the -NH3 groups of the organic cations and the iodine atoms of the outer inorganic layout is found to critically contribute to the relative thermodynamic stability of slabs with varying surface compositions and terminations. Most importantly, our results show that the hydrogen bond locking effects induced by the MA groups tend to protect the external two-dimensional lattice against large local structural deformations, i.e., the formation of a small exciton-polaron, at variance with purely inorganic lead halide perovskites.
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Affiliation(s)
- Guangjun Nan
- Department of Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004, P. R. China
| | - David Beljonne
- Laboratory for Chemistry of Novel Materials, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
| | - Xu Zhang
- Department of Physics and Astronomy, California State University Northridge, Northridge, California 91330-8268, United States
| | - Claudio Quarti
- Laboratory for Chemistry of Novel Materials, University of Mons, Place du Parc 20, B-7000 Mons, Belgium
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23
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Tong L, Zhang B, Wang XG, Liao YJ, Yang JQ. Quantum Dynamics Simulations on the Adsorption Mechanism of Reducing and Oxidizing Gases on the CH
3
NH
3
PbI
3
Surface. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lei Tong
- School of Renewable Energy North China Electric Power University Beijing 102206 China
- School of Renewable Energy North China Electric Power University Beijing 102206 China
| | - Bing Zhang
- School of Renewable Energy North China Electric Power University Beijing 102206 China
| | - Xiaogang G. Wang
- School of Renewable Energy North China Electric Power University Beijing 102206 China
| | - Yinjie J. Liao
- School of Renewable Energy North China Electric Power University Beijing 102206 China
| | - Jieqin Q. Yang
- School of Renewable Energy North China Electric Power University Beijing 102206 China
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24
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Scher JA, Govind N, Chakraborty A. Evidence of Skewness and Sub-Gaussian Character in Temperature-Dependent Distributions of One Million Electronic Excitation Energies in PbS Quantum Dots. J Phys Chem Lett 2020; 11:986-992. [PMID: 31927924 DOI: 10.1021/acs.jpclett.9b03103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Obtaining statistical distributions by sampling a large number of conformations is vital for an accurate description of temperature-dependent properties of chemical systems. However, constructing distributions with 105-106 samples is computationally challenging because of the prohibitively high computational cost of performing first-principles quantum mechanical calculations. In this work, we present a new technique called the effective stochastic potential configuration interaction singles (ESP-CIS) method to obtain excitation energies. The ESP-CIS method uses random matrix theory for the construction of an effective stochastic representation of the Fock operator and combines it with the CIS method. Excited-state energies of PbS quantum dots (0.75-1.75 nm) at temperatures of 10-400 K were calculated using the ESP-CIS method. Results from a total of 27 million excitation energy calculations revealed the distributions to be sub-Gaussian in nature with negative skewness, which progressively became red-shifted with increasing temperature. This study demonstrates the efficacy of the ESP-CIS method as a general-purpose method for efficient excited-state calculations.
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Affiliation(s)
- Jeremy A Scher
- Department of Chemistry , Syracuse University , Syracuse , New York 13244 , United States
| | - Niranjan Govind
- Environmental Molecular Sciences Laboratory , Pacific Northwest National Laboratory , Richland , Washington 99352 , United States
| | - Arindam Chakraborty
- Department of Chemistry , Syracuse University , Syracuse , New York 13244 , United States
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25
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McDonald C, Ni C, Maguire P, Connor P, Irvine JTS, Mariotti D, Svrcek V. Nanostructured Perovskite Solar Cells. NANOMATERIALS 2019; 9:nano9101481. [PMID: 31635204 PMCID: PMC6835749 DOI: 10.3390/nano9101481] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 12/27/2022]
Abstract
Over the past decade, lead halide perovskites have emerged as one of the leading photovoltaic materials due to their long carrier lifetimes, high absorption coefficients, high tolerance to defects, and facile processing methods. With a bandgap of ~1.6 eV, lead halide perovskite solar cells have achieved power conversion efficiencies in excess of 25%. Despite this, poor material stability along with lead contamination remains a significant barrier to commercialization. Recently, low-dimensional perovskites, where at least one of the structural dimensions is measured on the nanoscale, have demonstrated significantly higher stabilities, and although their power conversion efficiencies are slightly lower, these materials also open up the possibility of quantum-confinement effects such as carrier multiplication. Furthermore, both bulk perovskites and low-dimensional perovskites have been demonstrated to form hybrids with silicon nanocrystals, where numerous device architectures can be exploited to improve efficiency. In this review, we provide an overview of perovskite solar cells, and report the current progress in nanoscale perovskites, such as low-dimensional perovskites, perovskite quantum dots, and perovskite-nanocrystal hybrid solar cells.
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Affiliation(s)
- Calum McDonald
- Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan.
| | - Chengsheng Ni
- College of Resources and Environment, Southwest University, Beibei, Chongqing 400715, China.
| | - Paul Maguire
- School of Engineering, Ulster University, Newtownabbey BT14 8RT, UK.
| | - Paul Connor
- School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9AJ, UK.
| | - John T S Irvine
- School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9AJ, UK.
| | - Davide Mariotti
- School of Engineering, Ulster University, Newtownabbey BT14 8RT, UK.
| | - Vladimir Svrcek
- Research Center for Photovoltaics, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan.
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26
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Zhang B, Zhou S, Tong L, Liao Y, Yi J, Qi Y, Yao J. Large scale quantum dynamics investigations on the sensing mechanism of H 2O, acetone, NO 2 and O 3 adsorption on the (MA) 2Pb(SCN) 2I 2 surface. Phys Chem Chem Phys 2019; 21:21223-21235. [PMID: 31339117 DOI: 10.1039/c9cp02703c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The instability of organometal halide perovskites still remains a key obstacle restricting their practical application in gas sensing research. The first step in gas sensing using a semiconductor material is the recognition of a target gas through gas-solid interaction. In the current work, the adsorption mechanisms of MAPbI3-H2O, (MA)2Pb(SCN)2I2-H2O, (MA)2Pb(SCN)2I2-CH3COCH3, (MA)2Pb(SCN)2I2-NO2 and (MA)2Pb(SCN)2I2-O3 have been investigated by large-scale quantum dynamics simulations. The structural changes of the perovskite skeleton, the adsorption energy, and the charge transfer between the semiconductor material and the gas molecules have been analysed. The suitability and effectiveness of quantum dynamics simulations in adsorption mechanism research are firstly validated by comparing the humidity sensing mechanisms of MAPbI3 and (MA)2Pb(SCN)2I2. Different sensing mechanisms of (MA)2Pb(SCN)2I2 to gases with different oxidising properties have been proposed. These sensing mechanisms hopefully lay a foundation for the development of novel perovskite gas sensing materials with enhanced stability, high sensitivity, and high selectivity.
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Affiliation(s)
- Bing Zhang
- Beijing Key Laboratory of Energy Security and Clean Utilization, North China Electric Power University, Beijing 102206, China
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27
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Quan LN, Rand BP, Friend RH, Mhaisalkar SG, Lee TW, Sargent EH. Perovskites for Next-Generation Optical Sources. Chem Rev 2019; 119:7444-7477. [PMID: 31021609 DOI: 10.1021/acs.chemrev.9b00107] [Citation(s) in RCA: 274] [Impact Index Per Article: 54.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Next-generation displays and lighting technologies require efficient optical sources that combine brightness, color purity, stability, substrate flexibility. Metal halide perovskites have potential use in a wide range of applications, for they possess excellent charge transport, bandgap tunability and, in the most promising recent optical source materials, intense and efficient luminescence. This review links metal halide perovskites' performance as efficient light emitters with their underlying materials electronic and photophysical attributes.
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Affiliation(s)
- Li Na Quan
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
| | - Barry P Rand
- Department of Electrical Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544, United States
| | - Richard H Friend
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Subodh Gautam Mhaisalkar
- Energy Research Institute, Nanyang Technological University, Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, 637553 Singapore, Singapore
| | - Tae-Woo Lee
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Edward H Sargent
- Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario M5S 3G4, Canada
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28
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Abstract
Design and modification of interfaces, always a critical issue for semiconductor devices, has become a primary tool to harness the full potential of halide perovskite (HaP)-based optoelectronics, including photovoltaics and light-emitting diodes. In particular, the outstanding improvements in HaP solar cell performance and stability can be primarily ascribed to a careful choice of the interfacial layout in the layer stack. In this review, we describe the unique challenges and opportunities of these approaches (section 1). For this purpose, we first elucidate the basic physical and chemical properties of the exposed HaP thin film and crystal surfaces, including topics such as surface termination, surface reactivity, and electronic structure (section 2). This is followed by discussing experimental results on the energetic alignment processes at the interfaces between the HaP and transport and buffer layers. This section includes understandings reached as well as commonly proposed and applied models, especially the often-questionable validity of vacuum level alignment, the importance of interface dipoles, and band bending as the result of interface formation (section 3). We follow this by elaborating on the impact of the interface formation on device performance, considering effects such as chemical reactions and surface passivation on interface energetics and stability. On the basis of these concepts, we propose a roadmap for the next steps in interfacial design for HaP semiconductors (section 4), emphasizing the importance of achieving control over the interface energetics and chemistry (i.e., reactivity) to allow predictive power for tailored interface optimization.
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Affiliation(s)
- Philip Schulz
- Institut Photovoltaïque d'Île-de-France (IPVF) , 91120 Palaiseau , France.,CNRS , Institut Photovoltaı̈que d'Île de France (IPVF) , UMR 9006 , 91120 Palaiseau , France.,National Center for Photovoltaics , National Renewable Energy Laboratory , Golden , Colorado 80401 , United States
| | - David Cahen
- Department of Materials and Interfaces , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - Antoine Kahn
- Department of Electrical Engineering , Princeton University , Princeton , New Jersey 08544 , United States
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29
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Fu Q, Draxl C. Hybrid Organic-Inorganic Perovskites as Promising Substrates for Pt Single-Atom Catalysts. PHYSICAL REVIEW LETTERS 2019; 122:046101. [PMID: 30768292 DOI: 10.1103/physrevlett.122.046101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 09/02/2018] [Indexed: 06/09/2023]
Abstract
Single-atom catalysts (SACs) combine the best of two worlds by bridging heterogeneous and homogeneous catalysis. The superior catalytic properties of SACs, however, can hardly be exploited without a suitable substrate. Here, we explore the possibility of using hybrid organic-inorganic perovskites as supporting materials for single transition-metal atoms. By means of first-principles calculations, we predict that single Pt atoms can be incorporated into methylammonium lead iodide surfaces by replacing the methylammonium groups at the outermost layer. The iodide anions at the surface provide potentially uniform anchoring sites for the Pt atoms and donate electrons, generating negatively charged Pt_{1}^{δ-} species that allow for preferential O_{2} adsorption in the presence of CO. Such Pt sites are able to catalyze CO oxidation and may also play a role in CO_{2} reduction. The fundamental understanding generated here will shed light on potential applications of hybrid perovskites in the field of (photo)catalysis.
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Affiliation(s)
- Qiang Fu
- Institut für Physik and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- School of Chemistry and Chemical Engineering, Shandong University, 250100 Jinan, China
| | - Claudia Draxl
- Institut für Physik and IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, 14195 Berlin, Germany
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30
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Wei Y, Cheng Z, Lin J. An overview on enhancing the stability of lead halide perovskite quantum dots and their applications in phosphor-converted LEDs. Chem Soc Rev 2019; 48:310-350. [PMID: 30465675 DOI: 10.1039/c8cs00740c] [Citation(s) in RCA: 355] [Impact Index Per Article: 71.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Beyond the unprecedented success achieved in photovoltaics (PVs), lead halide perovskites (LHPs) have shown great potential in other optoelectronic devices. Among them, nanometer-scale perovskite quantum dots (PQDs) with fascinating optical properties including high brightness, tunable emission wavelength, high color purity, and high defect tolerance have been regarded as promising alternative down-conversion materials in phosphor-converted light-emitting diodes (pc-LEDs) for lighting and next-generation of display technology. Despite the promising applications of perovskite materials in various fields, they have received strong criticism for the lack of stability. The poor stability has also attracted much attention. Within a few years, numerous strategies towards enhancing the stability have been developed. This review summarizes the mechanisms of intrinsic- and extrinsic-environment-induced decomposition of PQDs. Simultaneously, the strategies for improving the stability of PQDs are reviewed in detail, which can be classified into four types: (1) compositional engineering; (2) surface engineering; (3) matrix encapsulation; (4) device encapsulation. Finally, the challenges for applying PQDs in pc-LEDs are highlighted, and some possible solutions to improve the stability of PQDs together with suggestions for further improving the performance of pc-LEDs as well as the device lifetime are provided.
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Affiliation(s)
- Yi Wei
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
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31
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Cegielski PJ, Giesecke AL, Neutzner S, Porschatis C, Gandini M, Schall D, Perini CAR, Bolten J, Suckow S, Kataria S, Chmielak B, Wahlbrink T, Petrozza A, Lemme MC. Monolithically Integrated Perovskite Semiconductor Lasers on Silicon Photonic Chips by Scalable Top-Down Fabrication. NANO LETTERS 2018; 18:6915-6923. [PMID: 30278610 DOI: 10.1021/acs.nanolett.8b02811] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Metal-halide perovskites are promising lasing materials for the realization of monolithically integrated laser sources, the key components of silicon photonic integrated circuits (PICs). Perovskites can be deposited from solution and require only low-temperature processing, leading to significant cost reduction and enabling new PIC architectures compared to state-of-the-art lasers realized through the costly and inefficient hybrid integration of III-V semiconductors. Until now, however, due to the chemical sensitivity of perovskites, no microfabrication process based on optical lithography (and, therefore, on existing semiconductor manufacturing infrastructure) has been established. Here, the first methylammonium lead iodide perovskite microdisc lasers monolithically integrated into silicon nitride PICs by such a top-down process are presented. The lasers show a record low lasing threshold of 4.7 μJcm-2 at room temperature for monolithically integrated lasers, which are complementary metal-oxide-semiconductor compatible and can be integrated in the back-end-of-line processes.
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Affiliation(s)
| | | | - Stefanie Neutzner
- Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia , via Giovanni Pascoli 70/3 , 20133 Milan , Italy
| | | | - Marina Gandini
- Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia , via Giovanni Pascoli 70/3 , 20133 Milan , Italy
| | - Daniel Schall
- AMO GmbH , Otto-Blumenthal-Straße 25 , 52074 Aachen , Germany
| | - Carlo A R Perini
- Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia , via Giovanni Pascoli 70/3 , 20133 Milan , Italy
| | - Jens Bolten
- AMO GmbH , Otto-Blumenthal-Straße 25 , 52074 Aachen , Germany
| | - Stephan Suckow
- AMO GmbH , Otto-Blumenthal-Straße 25 , 52074 Aachen , Germany
| | - Satender Kataria
- Elektrotechnik und Informationstechnik, Lehrstuhl für Elektronische Bauelemente , RWTH Aachen University , Otto-Blumenthal-Straße 25 , 52074 Aachen , Germany
| | - Bartos Chmielak
- AMO GmbH , Otto-Blumenthal-Straße 25 , 52074 Aachen , Germany
| | | | - Annamaria Petrozza
- Center for Nano Science and Technology @Polimi, Istituto Italiano di Tecnologia , via Giovanni Pascoli 70/3 , 20133 Milan , Italy
| | - Max C Lemme
- AMO GmbH , Otto-Blumenthal-Straße 25 , 52074 Aachen , Germany
- Elektrotechnik und Informationstechnik, Lehrstuhl für Elektronische Bauelemente , RWTH Aachen University , Otto-Blumenthal-Straße 25 , 52074 Aachen , Germany
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32
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Cho H, Kim YH, Wolf C, Lee HD, Lee TW. Improving the Stability of Metal Halide Perovskite Materials and Light-Emitting Diodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1704587. [PMID: 29369426 DOI: 10.1002/adma.201704587] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 10/14/2017] [Indexed: 05/07/2023]
Abstract
Metal halide perovskites (MHPs) have numerous advantages as light emitters such as high photoluminescence quantum efficiency with a direct bandgap, very narrow emission linewidth, high charge-carrier mobility, low energetic disorder, solution processability, simple color tuning, and low material cost. Based on these advantages, MHPs have recently shown unprecedented radical progress (maximum current efficiency from 0.3 to 42.9 cd A-1 ) in the field of light-emitting diodes. However, perovskite light-emitting diodes (PeLEDs) suffer from intrinsic instability of MHP materials and instability arising from the operation of the PeLEDs. Recently, many researchers have devoted efforts to overcome these instabilities. Here, the origins of the instability in PeLEDs are reviewed by categorizing it into two types: instability of (i) the MHP materials and (ii) the constituent layers and interfaces in PeLED devices. Then, the strategies to improve the stability of MHP materials and PeLEDs are critically reviewed, such as A-site cation engineering, Ruddlesden-Popper phase, suppression of ion migration with additives and blocking layers, fabrication of uniform bulk polycrystalline MHP layers, and fabrication of stable MHP nanoparticles. Based on this review of recent advances, future research directions and an outlook of PeLEDs for display applications are suggested.
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Affiliation(s)
- Himchan Cho
- Department of Materials Science and Engineering, BK21 PLUS SNU Materials Division for Educating Creative Global Leaders, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Young-Hoon Kim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, BK21 PLUS SNU Materials Division for Educating Creative Global Leaders, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Christoph Wolf
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Hyeon-Dong Lee
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Tae-Woo Lee
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, BK21 PLUS SNU Materials Division for Educating Creative Global Leaders, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
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Yao CL, Li JC, Gao W, Jiang Q. Long-Term Stability of Perovskite Solar Cells under Different Growth Conditions: A Defect-Controlled Water Diffusion Mechanism. J Phys Chem Lett 2018; 9:5386-5391. [PMID: 30160489 DOI: 10.1021/acs.jpclett.8b02265] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding the water-infiltration process is crucial for improving the long-term stability of perovskite solar cells (PSCs). Although many attempts have been made in this regard, the role of growth condition in PSC synthesis, which has been observed experimentally to be essential for the stability of PSCs, remains elusive. Using first-principles tools, we demonstrate that the growth condition strongly controls the water-infiltration process of PSCs by dictating the formation of point defects on PSC surfaces. The resulting point defects are found to alter both the rate and the pathways of the water-infiltration process substantially. Our work builds a new scenario for understanding the relation between the PSC decomposition mechanism and its preparation methods; it not only sheds new insights for decrypting experimental phenomenon, but also provides important guidance for future preparation of PSCs with improved water resistance.
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Affiliation(s)
- Cang-Lang Yao
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering , Jilin University , Changchun 130022 , People's Republic of China
| | - Jian-Chen Li
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering , Jilin University , Changchun 130022 , People's Republic of China
| | - Wang Gao
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering , Jilin University , Changchun 130022 , People's Republic of China
| | - Qing Jiang
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering , Jilin University , Changchun 130022 , People's Republic of China
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34
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Uddin MA, Calabro RL, Kim DY, Graham KR. Halide exchange and surface modification of metal halide perovskite nanocrystals with alkyltrichlorosilanes. NANOSCALE 2018; 10:16919-16927. [PMID: 30178805 DOI: 10.1039/c8nr04763d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Metal halide perovskite nanocrystals have recently emerged as promising materials for light emitting displays and lasing applications due to their narrow emission wavelengths, high photoluminescence quantum yields, and readily adjustable emission wavelengths. For these metal halide perovskite nanocrystals to be useful in commercial applications, their stability must be increased and the photoluminescence quantum yields of the iodide (red emitting) and chloride (blue emitting) containing derivatives must also be increased. The photoluminescence quantum yields of blue emitting CsPbCl3 nanoparticles lag behind those of green emitting CsPbBr3 nanoparticles, with maximum photoluminescence quantum yields of 1-10% previously reported for CsPbCl3 as compared to 80-100% for CsPbBr3. Herein, we show that alkyltrichlorosilanes (R-SiCl3) can be used as Cl-sources for rapid anion exchange with host CsPbBr3 nanocrystals. This anion exchange reaction is advantageous in that it can be performed at room temperature and results in highly dispersible nanoparticles coated with siloxane shells. CsPbCl3 nanoparticles produced through Cl-exchange with R-SiCl3 show significantly improved long-term stability and high photoluminescence quantum yields of up to 12%. These siloxane coated nanocrystals are even stable in the presence of water, whereas CsPbCl3 nanoparticles synthesized through other routes rapidly degrade in the presence of water.
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Affiliation(s)
- Md Aslam Uddin
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA.
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35
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He Y, Wang SQ, Xue XX, Zhang L, Chen K, Zhou WX, Feng Y. Ab initio study of the moisture stability of lead iodine perovskites. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:355501. [PMID: 30027891 DOI: 10.1088/1361-648x/aad4d0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The stability of hybrid lead iodine perovskite in a humid environment has been a major obstacle to developing long-term photovoltaic devices. However, understanding the detailed degradation mechanism of lead iodine perovskite in moisture is still challenging. Herein, using first-principles calculations, we show that embedded water molecules will facilitate the decomposition of lead iodine perovskite. Alloying FAPbI3 and CsPbI3 to form mixed-cation lead iodine perovskites not only can optimize the tolerance factor to obtain better phase stability, but also can improve the moisture stability of them. With the accumulation of water molecules in the perovskite lattice, the optical absorption spectra show a blue-shift and decreased intensity, and the moisture stabilities of lead iodine perovskites are further lowered. The iodine vacancy in lead iodine perovskites can facilitate the water molecule migration and thus is a disadvantage in improving the moisture stability of them, which should be minimized during perovskite growth. These findings provide new insight in understanding the poor moisture stability of lead iodine perovskites, which should be helpful for the future design and optimization of stable perovskite solar cells.
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Affiliation(s)
- Yunqiu He
- School of Physics and Electronics, Hunan University, Changsha 410082, People's Republic of China
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36
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Wang Z, Ou Q, Zhang Y, Zhang Q, Hoh HY, Bao Q. Degradation of Two-Dimensional CH 3NH 3PbI 3 Perovskite and CH 3NH 3PbI 3/Graphene Heterostructure. ACS APPLIED MATERIALS & INTERFACES 2018; 10:24258-24265. [PMID: 29877688 DOI: 10.1021/acsami.8b04310] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Hybrid organic-inorganic metal halide perovskites have been considered as promising materials for boosting the performance of photovoltaics and optoelectronics. Reduced-dimensional condiments and tunable properties render two-dimensional (2D) perovskite as novel building blocks for constructing micro-/nanoscale devices in high-performance optoelectronic applications. However, the stability is still one major obstacle for long-term practical use. Herein, we provide microscale insights into the degradation kinetics of 2D CH3NH3PbI3 (MAPbI3) perovskite and CH3NH3PbI3/graphene heterostructures. It is found that the degradation is mainly caused by cation evaporation, which consequently affects the microstructure, light-matter interaction, and the photoluminescence quantum yield efficiency of the 2D perovskite. Interestingly, the encapsulation of perovskite by monolayer graphene can largely preserve the structure of the perovskite nanosheet and maintain reasonable optical properties upon exposure to high temperature and humidity. The heterostructure consisting of perovskite and another 2D impermeable material affords new possibilities to construct high-performance and stable perovskite-based optoelectronic devices.
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Affiliation(s)
- Ziyu Wang
- Department of Materials Science and Engineering , Monash University , Wellington Road , Clayton , Victoria 3800 , Australia
| | - Qingdong Ou
- Department of Materials Science and Engineering , Monash University , Wellington Road , Clayton , Victoria 3800 , Australia
| | - Yupeng Zhang
- College of Electronic Science and Technology , Shenzhen University , Shenzhen 518000 , P. R. China
| | | | - Hui Ying Hoh
- College of Electronic Science and Technology , Shenzhen University , Shenzhen 518000 , P. R. China
| | - Qiaoliang Bao
- Department of Materials Science and Engineering , Monash University , Wellington Road , Clayton , Victoria 3800 , Australia
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37
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Ma H, Wang W, Xu H, Wang Z, Tao Y, Chen P, Liu W, Zhang X, Ma J, Liu Y. Interface State-Induced Negative Differential Resistance Observed in Hybrid Perovskite Resistive Switching Memory. ACS APPLIED MATERIALS & INTERFACES 2018; 10:21755-21763. [PMID: 29873232 DOI: 10.1021/acsami.8b07850] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hybrid organic-inorganic perovskite, well-known as light-absorbing materials in solar cells, have recently attracted considerable interest for applications in resistive switching (RS) memory. A better understanding of the role of interface state in hybrid perovskite materials on RS behavior is essential for the development of practical devices. Here, we study the influence of interface state on the RS behavior of an Au/CH3NH3PbI3/FTO memory device using a simple air exposure method. We observe a transition of RS hysteresis behavior with exposure time. Initially no hysteresis is apparent, but air exposure induces bipolar RS and a negative differential resistance (NDR) phenomenon. The reductions of I/Pb atomic ratio and work function on the film surface are examined using XPS spectra and Kelvin probe technique, verifying the produce of donor-type interface states (e.g., iodine vacancies) during CH3NH3PbI3 film degradation. Studies on complex impedance spectroscopy confirm the responsibility of interface states in NDR behavior. Eventually, the trapping/detrapping of electrons in bulk defects and at interface states accounts for the bipolar RS behavior accompanied with the NDR effect.
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Affiliation(s)
- Hanlu Ma
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Wei Wang
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Haiyang Xu
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Zhongqiang Wang
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Ye Tao
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Peng Chen
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Weizhen Liu
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Xintong Zhang
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Jiangang Ma
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
| | - Yichun Liu
- Key Laboratory for UV Light-Emitting Materials and Technology, Ministry of Education , Northeast Normal University , 5268 Renmin Street , Changchun 130024 , China
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38
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Tian W, Zhou H, Li L. Hybrid Organic-Inorganic Perovskite Photodetectors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13. [PMID: 28895306 DOI: 10.1002/smll.201702107] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 07/28/2017] [Indexed: 05/15/2023]
Abstract
Hybrid organic-inorganic perovskite materials garner enormous attention for a wide range of optoelectronic devices. Due to their attractive optical and electrical properties including high optical absorption coefficient, high carrier mobility, and long carrier diffusion length, perovskites have opened up a great opportunity for high performance photodetectors. This review aims to give a comprehensive summary of the significant results on perovskite-based photodetectors, focusing on the relationship among the perovskite structures, device configurations, and photodetecting performances. An introduction of recent progress in various perovskite structure-based photodetectors is provided. The emphasis is placed on the correlation between the perovskite structure and the device performance. Next, recent developments of bandgap-tunable perovskite and hybrid photodetectors built from perovskite heterostructures are highlighted. Then, effective approaches to enhance the stability of perovskite photodetector are presented, followed by the introduction of flexible and self-powered perovskite photodetectors. Finally, a summary of the previous results is given, and the major challenges that need to be addressed in the future are outlined. A comprehensive summary of the research status on perovskite photodetectors is hoped to push forward the development of this field.
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Affiliation(s)
- Wei Tian
- College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215006, P. R. China
| | - Huanping Zhou
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Liang Li
- College of Physics, Optoelectronics and Energy, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215006, P. R. China
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39
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Chen PT, Yung TY, Liu TY, Sher CW, Hayashi M. Water-resistance of macromolecules adsorbed on CH3NH3PbI3 surfaces: A first-principles study. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.08.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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40
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Caddeo C, Saba MI, Meloni S, Filippetti A, Mattoni A. Collective Molecular Mechanisms in the CH 3NH 3PbI 3 Dissolution by Liquid Water. ACS NANO 2017; 11:9183-9190. [PMID: 28783296 DOI: 10.1021/acsnano.7b04116] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The origin of the dissolution of methylammonium lead trihalide (MAPI) crystals in liquid water is clarified by finite-temperature molecular dynamics by developing a MYP-based force field (MYP1) for water-MAPI systems. A thermally activated process is found with an energy barrier of 0.36 eV consisting of a layer-by-layer degradation with generation of inorganic PbI2 films and solvation of MA and I ions. We rationalize the effect of water on MAPI by identifying a transition from a reversible absorption and diffusion in the presence of vapor to the irreversible destruction of the crystal lattice in liquid due to a cooperative action of water molecules. A strong water-MAPI interaction is found with a binding energy of 0.41 eV/H2O and wetting energy of 0.23 N/m. The water vapor absorption is energetically favored (0.29 eV/H2O), and the infiltrated molecules can migrate within the crystal with a diffusion coefficient D = 1.7 × 10-8 cm2/s and activation energy of 0.28 eV.
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Affiliation(s)
- Claudia Caddeo
- Istituto Officina dei Materiali (CNR - IOM) Cagliari , Cittadella Universitaria, I-09042 Monserrato (Ca), Italy
| | - Maria Ilenia Saba
- Istituto Officina dei Materiali (CNR - IOM) Cagliari , Cittadella Universitaria, I-09042 Monserrato (Ca), Italy
| | - Simone Meloni
- Department of Mechanical and Aerospace Engineering, Università La Sapienza , Via Eudossiana 18, 00184 Roma, Italy
| | - Alessio Filippetti
- Istituto Officina dei Materiali (CNR - IOM) Cagliari , Cittadella Universitaria, I-09042 Monserrato (Ca), Italy
- Dipartimento di Fisica, Università degli Studi di Cagliari , Cittadella Universitaria, I-09042 Monserrato (Ca), Italy
| | - Alessandro Mattoni
- Istituto Officina dei Materiali (CNR - IOM) Cagliari , Cittadella Universitaria, I-09042 Monserrato (Ca), Italy
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41
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Steele JA, Yuan H, Tan CYX, Keshavarz M, Steuwe C, Roeffaers MBJ, Hofkens J. Direct Laser Writing of δ- to α-Phase Transformation in Formamidinium Lead Iodide. ACS NANO 2017; 11:8072-8083. [PMID: 28763617 PMCID: PMC5595358 DOI: 10.1021/acsnano.7b02777] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Organolead halide perovskites are increasingly considered for applications well beyond photovoltaics, for example, as the active regions within photonic devices. Herein, we report the direct laser writing (DLW: 458 nm cw-laser) of the formamidinium lead iodide (FAPbI3) yellow δ-phase into its high-temperature luminescent black α-phase, a remarkably easy and scalable approach that takes advantage of the material's susceptibility to transition under ambient conditions. Through the DLW of α-FAPbI3 tracks on δ-FAPbI3 single-crystal surfaces, the controlled and rapid microfabrication of highly luminescent structures exhibiting long-term phase stability is detailed, offering an avenue toward the prototyping of complex perovskite-based optical devices. The dynamics and kinetics of laser-induced δ- to α-phase transformations are investigated in situ by Raman microprobe analysis, as a function of irradiation power, time, temperature, and atmospheric conditions, revealing an interesting connection between oxygen intercalation at the surface and the δ- to α-phase transformation dynamics, an insight that will find application within the wider context of FAPbI3 thermal phase relations.
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Affiliation(s)
- Julian A. Steele
- Centre
for Surface Chemistry and Catalysis and Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
- E-mail:
| | - Haifeng Yuan
- Centre
for Surface Chemistry and Catalysis and Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Collin Y. X. Tan
- Centre
for Surface Chemistry and Catalysis and Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Masoumeh Keshavarz
- Centre
for Surface Chemistry and Catalysis and Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Christian Steuwe
- Centre
for Surface Chemistry and Catalysis and Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Maarten B. J. Roeffaers
- Centre
for Surface Chemistry and Catalysis and Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
- E-mail:
| | - Johan Hofkens
- Centre
for Surface Chemistry and Catalysis and Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
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42
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Waleed A, Fan Z. Fabrication of stable organometallic halide perovskite NWs based optoelectronic devices. Sci Bull (Beijing) 2017; 62:645-647. [PMID: 36659305 DOI: 10.1016/j.scib.2017.04.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Aashir Waleed
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Zhiyong Fan
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.
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Dastidar S, Hawley CJ, Dillon AD, Gutierrez-Perez AD, Spanier JE, Fafarman AT. Quantitative Phase-Change Thermodynamics and Metastability of Perovskite-Phase Cesium Lead Iodide. J Phys Chem Lett 2017; 8:1278-1282. [PMID: 28256139 DOI: 10.1021/acs.jpclett.7b00134] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The perovskite phase of cesium lead iodide (α-CsPbI3 or "black" phase) possesses favorable optoelectronic properties for photovoltaic applications. However, the stable phase at room temperature is a nonfunctional "yellow" phase (δ-CsPbI3). Black-phase polycrystalline thin films are synthesized above 330 °C and rapidly quenched to room temperature, retaining their phase in a metastable state. Using differential scanning calorimetry, it is shown herein that the metastable state is maintained in the absence of moisture, up to a temperature of 100 °C, and a reversible phase-change enthalpy of 14.2 (±0.5) kJ/mol is observed. The presence of atmospheric moisture hastens the black-to-yellow conversion kinetics without significantly changing the enthalpy of the transition, indicating a catalytic effect, rather than a change in equilibrium due to water adduct formation. These results delineate the conditions for trapping the desired phase and highlight the significant magnitude of the entropic stabilization of this phase.
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Affiliation(s)
- Subham Dastidar
- Department of Chemical and Biological Engineering, Drexel University , 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Christopher J Hawley
- Department of Materials Science & Engineering, Drexel University , Philadelphia, Pennsylvania 19104, United States
| | - Andrew D Dillon
- Department of Chemical and Biological Engineering, Drexel University , 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Alejandro D Gutierrez-Perez
- Department of Materials Science & Engineering, Drexel University , Philadelphia, Pennsylvania 19104, United States
| | - Jonathan E Spanier
- Department of Materials Science & Engineering, Drexel University , Philadelphia, Pennsylvania 19104, United States
| | - Aaron T Fafarman
- Department of Chemical and Biological Engineering, Drexel University , 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
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Waleed A, Tavakoli MM, Gu L, Wang Z, Zhang D, Manikandan A, Zhang Q, Zhang R, Chueh YL, Fan Z. Lead-Free Perovskite Nanowire Array Photodetectors with Drastically Improved Stability in Nanoengineering Templates. NANO LETTERS 2017; 17:523-530. [PMID: 28009510 DOI: 10.1021/acs.nanolett.6b04587] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Organometal halide perovskite materials have triggered enormous attention for a wide range of high-performance optoelectronic devices. However, their stability and toxicity are major bottleneck challenges for practical applications. Substituting toxic heavy metal, that is, lead (Pb), with other environmentally benign elements, for example, tin (Sn), could be a potential solution to address the toxicity issue. Nevertheless, even worse stability of Sn-based perovskite material than Pb-based perovskite poses a great challenge for further device fabrication. In this work, for the first time, three-dimensional CH3NH3SnI3 perovskite nanowire arrays were fabricated in nanoengineering templates, which can address nanowire integration and stability issues at the same time. Also, nanowire photodetectors have been fabricated and characterized. Intriguingly, it was discovered that as the nanowires are embedded in mechanically and chemically robust templates, the material decay process has been dramatically slowed down by up to 840 times, as compared with a planar thin film. This significant improvement on stability can be attributed to the effective blockage of diffusion of water and oxygen molecules within the templates. These results clearly demonstrate a new and alternative strategy to address the stability issue of perovskite materials, which is the major roadblock for high-performance optoelectronics.
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Affiliation(s)
- Aashir Waleed
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Mohammad Mahdi Tavakoli
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong SAR, China
- Department of Materials Science and Engineering, Sharif University of Technology , Azadi Avenue, 113659466 Tehran, Iran
| | - Leilei Gu
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Ziyi Wang
- Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - Daquan Zhang
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Arumugam Manikandan
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan ROC
| | - Qianpeng Zhang
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Rongjun Zhang
- Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - Yu-Lun Chueh
- Department of Materials Science and Engineering, National Tsing Hua University , Hsinchu 30013, Taiwan ROC
| | - Zhiyong Fan
- Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong SAR, China
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