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Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive

Flexible perovskite solar cells (PSCs) have attracted tremendous attention due to their potential application in portable and wearable electronics. However, the photoelectric conversion efficiency (PCE) of flexible PSCs is still far lower than that of usual rigid PSCs. Moreover, the mechanical stabi...

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Autores principales: Zhang, Xiaobo, Ma, Yang, Chen, Xiaoqing, Li, Xuhong, Zhou, Wencai, Ouedraogo, Nabonswende Aida Nadege, Shirai, Yasuhiro, Zhang, Yongzhe, Yan, Hui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042258/
https://www.ncbi.nlm.nih.gov/pubmed/35497527
http://dx.doi.org/10.1039/d1ra05399j
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author Zhang, Xiaobo
Ma, Yang
Chen, Xiaoqing
Li, Xuhong
Zhou, Wencai
Ouedraogo, Nabonswende Aida Nadege
Shirai, Yasuhiro
Zhang, Yongzhe
Yan, Hui
author_facet Zhang, Xiaobo
Ma, Yang
Chen, Xiaoqing
Li, Xuhong
Zhou, Wencai
Ouedraogo, Nabonswende Aida Nadege
Shirai, Yasuhiro
Zhang, Yongzhe
Yan, Hui
author_sort Zhang, Xiaobo
collection PubMed
description Flexible perovskite solar cells (PSCs) have attracted tremendous attention due to their potential application in portable and wearable electronics. However, the photoelectric conversion efficiency (PCE) of flexible PSCs is still far lower than that of usual rigid PSCs. Moreover, the mechanical stability of flexible PSCs cannot meet the needs of commercial applications because of the cracking of perovskite grains caused by bending stress. Here, we introduced a spacer cation additive (2-(chloromethyl) pyridine hydrochloride, CPHC) within the perovskite organic precursor to improve the device PCE and its mechanical stability. We observed that the CPHC spacer cation additive could simultaneously facilitate the crystallization of perovskite and stitch the grain boundaries to improve the flexibility. Compared to the 17.64% PCE of the control devices, the target flexible PSCs achieved a more highly efficiency over 19% with an improved mechanical stability (87.2% of the initial PCE after the 1000 cycles with the bending radius R = 6 mm). In addition, compared to methylammonium or formamidinium cation, due to the stronger hydrophobic and larger activation energy barrier for the ion migration of the CPHC spacer cation, the device retained over 80% of the initial PCE after 30 days storage in an ambient environment.
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spelling pubmed-90422582022-04-28 Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive Zhang, Xiaobo Ma, Yang Chen, Xiaoqing Li, Xuhong Zhou, Wencai Ouedraogo, Nabonswende Aida Nadege Shirai, Yasuhiro Zhang, Yongzhe Yan, Hui RSC Adv Chemistry Flexible perovskite solar cells (PSCs) have attracted tremendous attention due to their potential application in portable and wearable electronics. However, the photoelectric conversion efficiency (PCE) of flexible PSCs is still far lower than that of usual rigid PSCs. Moreover, the mechanical stability of flexible PSCs cannot meet the needs of commercial applications because of the cracking of perovskite grains caused by bending stress. Here, we introduced a spacer cation additive (2-(chloromethyl) pyridine hydrochloride, CPHC) within the perovskite organic precursor to improve the device PCE and its mechanical stability. We observed that the CPHC spacer cation additive could simultaneously facilitate the crystallization of perovskite and stitch the grain boundaries to improve the flexibility. Compared to the 17.64% PCE of the control devices, the target flexible PSCs achieved a more highly efficiency over 19% with an improved mechanical stability (87.2% of the initial PCE after the 1000 cycles with the bending radius R = 6 mm). In addition, compared to methylammonium or formamidinium cation, due to the stronger hydrophobic and larger activation energy barrier for the ion migration of the CPHC spacer cation, the device retained over 80% of the initial PCE after 30 days storage in an ambient environment. The Royal Society of Chemistry 2021-10-14 /pmc/articles/PMC9042258/ /pubmed/35497527 http://dx.doi.org/10.1039/d1ra05399j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Zhang, Xiaobo
Ma, Yang
Chen, Xiaoqing
Li, Xuhong
Zhou, Wencai
Ouedraogo, Nabonswende Aida Nadege
Shirai, Yasuhiro
Zhang, Yongzhe
Yan, Hui
Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive
title Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive
title_full Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive
title_fullStr Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive
title_full_unstemmed Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive
title_short Improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive
title_sort improved efficiency and stability of flexible perovskite solar cells by a new spacer cation additive
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042258/
https://www.ncbi.nlm.nih.gov/pubmed/35497527
http://dx.doi.org/10.1039/d1ra05399j
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