A crystal capping layer for formation of black-phase FAPbI3 perovskite in humid air

Yu Zou; Wenjin Yu; Haoqing Guo; Qizhi Li; Xiangdong Li; Liang Li; Yueli Liu; Hantao Wang; Zhenyu Tang; Shuang Yang; Yanrun Chen; Bo Qu; Yunan Gao; Zhijian Chen; Shufeng Wang; Dongdong Zhang; Yihua Chen; Qi Chen; Shaik M. Zakeeruddin; Yingying Peng; Huanping Zhou; Qihuang Gong; Mingyang Wei; Michael Grätzel; Lixin Xiao

doi:10.1126/science.adn9646

A crystal capping layer for formation of black-phase FAPbI₃ perovskite in humid air

Yu Zou, Wenjin Yu, Haoqing Guo, Qizhi Li, Xiangdong Li, Liang Li, Yueli Liu, Hantao Wang, Zhenyu Tang, Shuang Yang, Yanrun Chen, Bo Qu, Yunan Gao, Zhijian Chen, Shufeng Wang, Dongdong Zhang, Yihua Chen, Qi Chen, Shaik M. Zakeeruddin, Yingying PengHuanping Zhou, Qihuang Gong, Mingyang Wei, Michael Grätzel, Lixin Xiao

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Black-phase formamidinium lead iodide (α-FAPbI3) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI3. We show that the classic solvent system for perovskite fabrication exacerbates this reproducibility challenge. The conventional coordinative solvent dimethyl sulfoxide (DMSO) promoted δ-FAPbI3 formation under high relative humidity (RH) conditions because of its hygroscopic nature. We introduced chlorine-containing organic molecules to form a capping layer that blocked moisture penetration while preserving DMSO-based complexes to regulate crystal growth. We report power conversion efficiencies of >24.5% for perovskite solar cells fabricated across an RH range of 20 to 60%, and 23.4% at 80% RH. The unencapsulated device retained 96% of its initial performance in air (with 40 to 60% RH) after 500-hour maximum power point operation.

Original language	English
Pages (from-to)	161-167
Number of pages	7
Journal	Science
Volume	385
Issue number	6705
DOIs	https://doi.org/10.1126/science.adn9646
Publication status	Published - 12 Jul 2024

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title = "A crystal capping layer for formation of black-phase FAPbI3 perovskite in humid air",

abstract = "Black-phase formamidinium lead iodide (α-FAPbI3) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI3. We show that the classic solvent system for perovskite fabrication exacerbates this reproducibility challenge. The conventional coordinative solvent dimethyl sulfoxide (DMSO) promoted δ-FAPbI3 formation under high relative humidity (RH) conditions because of its hygroscopic nature. We introduced chlorine-containing organic molecules to form a capping layer that blocked moisture penetration while preserving DMSO-based complexes to regulate crystal growth. We report power conversion efficiencies of >24.5% for perovskite solar cells fabricated across an RH range of 20 to 60%, and 23.4% at 80% RH. The unencapsulated device retained 96% of its initial performance in air (with 40 to 60% RH) after 500-hour maximum power point operation.",

author = "Yu Zou and Wenjin Yu and Haoqing Guo and Qizhi Li and Xiangdong Li and Liang Li and Yueli Liu and Hantao Wang and Zhenyu Tang and Shuang Yang and Yanrun Chen and Bo Qu and Yunan Gao and Zhijian Chen and Shufeng Wang and Dongdong Zhang and Yihua Chen and Qi Chen and Zakeeruddin, {Shaik M.} and Yingying Peng and Huanping Zhou and Qihuang Gong and Mingyang Wei and Michael Gr{\"a}tzel and Lixin Xiao",

year = "2024",

month = jul,

day = "12",

doi = "10.1126/science.adn9646",

language = "English",

volume = "385",

pages = "161--167",

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Zou, Y, Yu, W, Guo, H, Li, Q, Li, X, Li, L, Liu, Y, Wang, H, Tang, Z, Yang, S, Chen, Y, Qu, B, Gao, Y, Chen, Z, Wang, S, Zhang, D, Chen, Y , Chen, Q, Zakeeruddin, SM, Peng, Y, Zhou, H, Gong, Q, Wei, M, Grätzel, M & Xiao, L 2024, 'A crystal capping layer for formation of black-phase FAPbI₃ perovskite in humid air', Science, vol. 385, no. 6705, pp. 161-167. https://doi.org/10.1126/science.adn9646

TY - JOUR

T1 - A crystal capping layer for formation of black-phase FAPbI3 perovskite in humid air

AU - Zou, Yu

AU - Yu, Wenjin

AU - Guo, Haoqing

AU - Li, Qizhi

AU - Li, Xiangdong

AU - Li, Liang

AU - Liu, Yueli

AU - Wang, Hantao

AU - Tang, Zhenyu

AU - Yang, Shuang

AU - Chen, Yanrun

AU - Qu, Bo

AU - Gao, Yunan

AU - Chen, Zhijian

AU - Wang, Shufeng

AU - Zhang, Dongdong

AU - Chen, Yihua

AU - Chen, Qi

AU - Zakeeruddin, Shaik M.

AU - Peng, Yingying

AU - Zhou, Huanping

AU - Gong, Qihuang

AU - Wei, Mingyang

AU - Grätzel, Michael

AU - Xiao, Lixin

PY - 2024/7/12

Y1 - 2024/7/12

N2 - Black-phase formamidinium lead iodide (α-FAPbI3) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI3. We show that the classic solvent system for perovskite fabrication exacerbates this reproducibility challenge. The conventional coordinative solvent dimethyl sulfoxide (DMSO) promoted δ-FAPbI3 formation under high relative humidity (RH) conditions because of its hygroscopic nature. We introduced chlorine-containing organic molecules to form a capping layer that blocked moisture penetration while preserving DMSO-based complexes to regulate crystal growth. We report power conversion efficiencies of >24.5% for perovskite solar cells fabricated across an RH range of 20 to 60%, and 23.4% at 80% RH. The unencapsulated device retained 96% of its initial performance in air (with 40 to 60% RH) after 500-hour maximum power point operation.

AB - Black-phase formamidinium lead iodide (α-FAPbI3) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI3. We show that the classic solvent system for perovskite fabrication exacerbates this reproducibility challenge. The conventional coordinative solvent dimethyl sulfoxide (DMSO) promoted δ-FAPbI3 formation under high relative humidity (RH) conditions because of its hygroscopic nature. We introduced chlorine-containing organic molecules to form a capping layer that blocked moisture penetration while preserving DMSO-based complexes to regulate crystal growth. We report power conversion efficiencies of >24.5% for perovskite solar cells fabricated across an RH range of 20 to 60%, and 23.4% at 80% RH. The unencapsulated device retained 96% of its initial performance in air (with 40 to 60% RH) after 500-hour maximum power point operation.

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DO - 10.1126/science.adn9646

M3 - Article

C2 - 38991067

AN - SCOPUS:85198609991

SN - 0036-8075

VL - 385

SP - 161

EP - 167

JO - Science

JF - Science

IS - 6705

ER -

A crystal capping layer for formation of black-phase FAPbI₃ perovskite in humid air

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