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Zhang G, Wei Q, Liu G, Li Q, Lu J, Ghasemi M, Wang J, Yang Y, Jia B, Wen X. Regulating Surface Defects to Achieve More Positive Light Soaking Effect in Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2024; 16:14263-14274. [PMID: 38441548 DOI: 10.1021/acsami.3c16908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
The dynamic defect tolerance under light soaking is a crucial aspect of halide perovskites. However, the underlying physics of light soaking remains elusive and is subject to debate, exhibiting both positive and negative effects. In this investigation, we demonstrated that surface defects in perovskite films significantly impact the performance and stability of perovskite solar cells, closely correlated with light soaking behaviors. Removing the top surface layer through adhesive tape, the surface defect density noticeably decreases, leading to enhanced photoluminescence (PL) efficiency, prolonged carrier lifetime, and higher conductivity. Consequently, the power conversion efficiency (PCE) of solar cells improves from 17.70% to 20.5%. Furthermore, we confirmed a positive correlation between surface defects and the light soaking effect. Perovskite films with low surface defects surprisingly exhibit a 3-fold increase in PL intensity and an 85% increase in carrier lifetime under 500 s of continuous illumination at an intensity of 100 mW/cm2. Beyond the conventional strategy of suppressing defect trapping, we propose increasing the capability of dynamic defect tolerance as an effective strategy to enhance the optoelectronic properties and performance of perovskite solar cells.
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Affiliation(s)
- Guijun Zhang
- International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, Yunnan 650091, China
| | - Qianwen Wei
- International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, Yunnan 650091, China
| | - Guangsheng Liu
- International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, Yunnan 650091, China
| | - Qi Li
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Junlin Lu
- School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Mehri Ghasemi
- School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Juan Wang
- International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, Yunnan 650091, China
| | - Yu Yang
- International Joint Research Center for Optoelectronic and Energy Materials, School of Materials and Energy, Yunnan University, Kunming, Yunnan 650091, China
| | - Baohua Jia
- School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Xiaoming Wen
- School of Science, RMIT University, Melbourne, VIC 3000, Australia
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Lin F, Zhang S, Zou B, Zeng R. Excited State Regulated Emission in Hybrid Indium Halides via Crystal Structure Switch. Inorg Chem 2024; 63:4355-4363. [PMID: 38383064 DOI: 10.1021/acs.inorgchem.3c04630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Organic-inorganic metal halides have become one of the most promising materials in the next generation of optoelectronic applications due to their high charge carrier mobility and tunable band gaps. In this study, Sb:PA6InCl9 and Sb:PA4NaInCl8 single crystals were prepared through evaporation crystallization, respectively. Due to the different degrees of lattice distortions, the highly efficient yellow emission in Sb:PA6InCl9 at 610 nm and the green emission in Sb:PA4NaInCl8 at 545 nm were achieved by regulation of the excited state, respectively. By introducing additional sodium ions in the post-treatment, we found that the zero-dimensional Sb:PA6InCl9 could rapidly convert into a two-dimensional layered structure of Sb:PA4NaInCl8, thus resulting in a novel green/yellow emission switch. This work guides the structural and performance control of organic-inorganic hybrid In-based metal halides and offers broad prospects for luminescent switching in anticounterfeiting applications.
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Affiliation(s)
- Fangping Lin
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
| | - Shuai Zhang
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
| | - Bingsuo Zou
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
| | - Ruosheng Zeng
- School of Physical Science and Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
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Griesi A, Faraji M, Kusch G, Khabbazabkenar S, Borreani M, Lauciello S, Schleusener A, Oliver RA, Krahne R, Divitini G. Mapping emission heterogeneity in layered halide perovskites using cathodoluminescence. NANOTECHNOLOGY 2023; 35:105204. [PMID: 38055988 DOI: 10.1088/1361-6528/ad12ec] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/06/2023] [Indexed: 12/08/2023]
Abstract
Recent advancements in the fabrication of layered halide perovskites and their subsequent modification for optoelectronic applications have ushered in a need for innovative characterisation techniques. In particular, heterostructures containing multiple phases and consequently featuring spatially defined optoelectronic properties are very challenging to study. Here, we adopt an approach centered on cathodoluminescence, complemented by scanning electron microscopy coupled with energy-dispersive x-ray spectroscopy analysis. Cathodoluminescence enables assessment of local emission variations by injecting charges with a nanometer-scale electron probe, which we use to investigate emission changes in three different systems: PEA2PbBr4, PEA2PbI4and lateral heterostructures of the two, fabricated via halide substitution. We identify and map different emission bands that can be correlated with local chemical composition and geometry. One emission band is characteristic of bromine-based halide perovskite, while the other originates from iodine-based perovskite. The coexistence of these emissions bands in the halide-substituted sample confirms the formation of lateral heterostructures. To improve the signal quality of the acquired data, we employed multivariate analysis, specifically the non-negative matrix factorization algorithm, on both cathodoluminescence and compositional datasets. The resulting understanding of the halide replacement process and identification of potential synergies in the optical properties will lead to optimised architectures for optoelectronic applications.
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Affiliation(s)
- Andrea Griesi
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
| | - Mehrdad Faraji
- Optoelectronics Research Line, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, I-16146 Genova, Italy
| | - Gunnar Kusch
- Department of Materials Science and Metallurgy, Cambridge University, Cambridge CB3 0FS, United Kingdom
| | - Sirous Khabbazabkenar
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
| | - Martina Borreani
- Optoelectronics Research Line, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
| | - Simone Lauciello
- Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
| | - Alexander Schleusener
- Optoelectronics Research Line, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
| | - Rachel A Oliver
- Department of Materials Science and Metallurgy, Cambridge University, Cambridge CB3 0FS, United Kingdom
| | - Roman Krahne
- Optoelectronics Research Line, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
| | - Giorgio Divitini
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
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Ba Q, Meena A, Jana A. Solid-State Synthesis and Optical Studies of Water-Stable Pb 2+-Doped Mn 2+ Complexes. Inorg Chem 2023; 62:19025-19032. [PMID: 37921514 DOI: 10.1021/acs.inorgchem.3c02840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
The limited Mn2+ doping that occurs in lead halide perovskites has been widely described, while the Pb2+ doping that occurs in Mn2+ halide perovskites has not been studied well. Generally, a large amount of doping of Mn2+ in lead halide perovskite degrades the perovskite structure; eventually, high orange luminescence of Mn2+ dopant has not been achieved. In our present study, we followed a reverse strategy, i.e., Pb2+ doping in Mn2+ halide perovskites, to increase the amount of Mn2+ in halide perovskites through the high-energy ball milling method. This strategy yields bright-fluorescence orange light-emitting Mn2+-doped perovskite with a Mn/Pb ratio of 95%, which is the highest among Mn2+-doped perovskites. Zero-dimensional (0D) Mn2+ perovskites and two-dimensional (2D) Pb2+-doped Mn2+-based perovskites were successfully synthesized and characterized. During the mechanochemical engineering, Pb2+ ions partially occupy the site of Mn2+ ions and act as a luminescence activator. Mn2+-based 2D perovskites with the proper amounts of Pb2+ ions as dopant ions and phenylethylammonium (PEA+) as dielectric organic cations show enhanced stability in water. The dual-emissive properties of these 2D-Pb2+-doped Mn2+-based perovskites were also investigated by using single-particle imaging fluorescence. We believe that these findings will pave the way for designing eco-friendly dimension and bandgap tunable layered perovskites.
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Affiliation(s)
- Qiankai Ba
- Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan 44919, South Korea
- Advanced Solar Technology Institute (ASTI), Xuancheng242000, Anhui, China
| | - Abhishek Meena
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
| | - Atanu Jana
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, Republic of Korea
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