A crystal capping layer for formation of black-phase FAPbI <sub>3</sub> perovskite in humid air-Reference-Cited by-同舟云学术

A crystal capping layer for formation of black-phase FAPbI ₃ perovskite in humid air

Published:2024-07-12 Issue:6705 Volume:385 Page:161-167
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Zou Yu¹^ORCID,Yu Wenjin¹^ORCID,Guo Haoqing¹^ORCID,Li Qizhi²^ORCID,Li Xiangdong¹,Li Liang³^ORCID,Liu Yueli¹^ORCID,Wang Hantao¹,Tang Zhenyu¹^ORCID,Yang Shuang¹,Chen Yanrun³,Qu Bo¹^ORCID,Gao Yunan¹^ORCID,Chen Zhijian¹,Wang Shufeng¹^ORCID,Zhang Dongdong⁴,Chen Yihua⁵^ORCID,Chen Qi⁵^ORCID,Zakeeruddin Shaik M.⁶^ORCID,Peng Yingying²^ORCID,Zhou Huanping³^ORCID,Gong Qihuang¹^ORCID,Wei Mingyang⁶^ORCID,Grätzel Michael⁶^ORCID,Xiao Lixin¹⁷^ORCID

Affiliation:

1. State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, P. R. China.

2. International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, P. R. China.

3. School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.

4. Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.

5. Experimental Center of Advanced Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.

6. Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.

7. Beijing Huairou Laboratory, Beijing 101400, P. R. China.

Abstract

Black-phase formamidinium lead iodide (α-FAPbI 3 ) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI 3 . We show that the classic solvent system for perovskite fabrication exacerbates this reproducibility challenge. The conventional coordinative solvent dimethyl sulfoxide (DMSO) promoted δ-FAPbI 3 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.

Publisher

American Association for the Advancement of Science (AAAS)

Link

https://www.science.org/doi/pdf/10.1126/science.adn9646

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