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Synergistic Effect of RbBr Interface Modification on Highly Efficient and Stable Perovskite Solar Cells
[Image: see text] Compact TiO(2) films are one of the most widely used electron transport layers (ETLs) in planar perovskite solar cells (PSCs). However, the performance of the PSC device is controlled by the comprehensive qualities of the functional layers and their bilateral surfaces. In this work...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8173572/ https://www.ncbi.nlm.nih.gov/pubmed/34095668 http://dx.doi.org/10.1021/acsomega.1c01074 |
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author | Li, Dan Li, Yong Liu, Lidan Liu, Zhike Yuan, Ningyi Ding, Jianning Wang, Dapeng Liu, Shengzhong Frank |
author_facet | Li, Dan Li, Yong Liu, Lidan Liu, Zhike Yuan, Ningyi Ding, Jianning Wang, Dapeng Liu, Shengzhong Frank |
author_sort | Li, Dan |
collection | PubMed |
description | [Image: see text] Compact TiO(2) films are one of the most widely used electron transport layers (ETLs) in planar perovskite solar cells (PSCs). However, the performance of the PSC device is controlled by the comprehensive qualities of the functional layers and their bilateral surfaces. In this work, the alkali metal halide of RbBr as the interfacial modifier is introduced into the interface of the TiO(2) ETL and perovskite absorber. By spin-coating the proper content of RbBr, the surface of the TiO(2) film consisting of smooth morphology and low density of oxygen-deficiency defect is readily obtained. The perovskite layer successively fabricated on the RbBr-modified TiO(2) film demonstrates large grain size, low surface roughness, and low bulk defect density, which enhances the electron extraction and decreases nonradiation recombination. By virtue of the modulation of the perovskite crystal quality and the passivation of the interfacial defects, the light-harvesting efficiency of the corresponding device is increased to 21.15 from 19.21% for the PSC without a RbBr insertion layer. More importantly, the passivation strategy enables impressive device stability by retaining 90% of its initial efficiency in an ambient environment for 500 h. This study provides a promising and feasible strategy to regulate surface passivation engineering and simultaneously facilitate the perovskite crystal growth for the achievement of efficient and stable perovskite photovoltaics. |
format | Online Article Text |
id | pubmed-8173572 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-81735722021-06-04 Synergistic Effect of RbBr Interface Modification on Highly Efficient and Stable Perovskite Solar Cells Li, Dan Li, Yong Liu, Lidan Liu, Zhike Yuan, Ningyi Ding, Jianning Wang, Dapeng Liu, Shengzhong Frank ACS Omega [Image: see text] Compact TiO(2) films are one of the most widely used electron transport layers (ETLs) in planar perovskite solar cells (PSCs). However, the performance of the PSC device is controlled by the comprehensive qualities of the functional layers and their bilateral surfaces. In this work, the alkali metal halide of RbBr as the interfacial modifier is introduced into the interface of the TiO(2) ETL and perovskite absorber. By spin-coating the proper content of RbBr, the surface of the TiO(2) film consisting of smooth morphology and low density of oxygen-deficiency defect is readily obtained. The perovskite layer successively fabricated on the RbBr-modified TiO(2) film demonstrates large grain size, low surface roughness, and low bulk defect density, which enhances the electron extraction and decreases nonradiation recombination. By virtue of the modulation of the perovskite crystal quality and the passivation of the interfacial defects, the light-harvesting efficiency of the corresponding device is increased to 21.15 from 19.21% for the PSC without a RbBr insertion layer. More importantly, the passivation strategy enables impressive device stability by retaining 90% of its initial efficiency in an ambient environment for 500 h. This study provides a promising and feasible strategy to regulate surface passivation engineering and simultaneously facilitate the perovskite crystal growth for the achievement of efficient and stable perovskite photovoltaics. American Chemical Society 2021-05-17 /pmc/articles/PMC8173572/ /pubmed/34095668 http://dx.doi.org/10.1021/acsomega.1c01074 Text en © 2021 The Authors. Published by American Chemical Society Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Li, Dan Li, Yong Liu, Lidan Liu, Zhike Yuan, Ningyi Ding, Jianning Wang, Dapeng Liu, Shengzhong Frank Synergistic Effect of RbBr Interface Modification on Highly Efficient and Stable Perovskite Solar Cells |
title | Synergistic Effect of RbBr Interface Modification
on Highly Efficient and Stable Perovskite Solar Cells |
title_full | Synergistic Effect of RbBr Interface Modification
on Highly Efficient and Stable Perovskite Solar Cells |
title_fullStr | Synergistic Effect of RbBr Interface Modification
on Highly Efficient and Stable Perovskite Solar Cells |
title_full_unstemmed | Synergistic Effect of RbBr Interface Modification
on Highly Efficient and Stable Perovskite Solar Cells |
title_short | Synergistic Effect of RbBr Interface Modification
on Highly Efficient and Stable Perovskite Solar Cells |
title_sort | synergistic effect of rbbr interface modification
on highly efficient and stable perovskite solar cells |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8173572/ https://www.ncbi.nlm.nih.gov/pubmed/34095668 http://dx.doi.org/10.1021/acsomega.1c01074 |
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