Affiliation:
1. School of Physics and Materials Science/Institute of Polymers and Energy Chemistry (IPEC)/Jiangxi Provincial Key Laboratory of New Energy Chemistry Nanchang University 999 Xuefu Avenue Nanchang 330031 China
2. School of future technology Nanchang University Nanchang 330031 China
3. Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010 China
4. Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University 99 Ziyang Avenue Nanchang 330022 China
Abstract
AbstractMoisture is a double‐edged sword in the nucleation and crystallization of perovskite films. In the presence of appropriate moisture in the air, grain boundaries are expected to merge neighboring grains, promoting the conversion of unreacted ions, resulting in large grains and pinhole‐free films. Adversely, excessive moisture can have detrimental effects on perovskite by damaging its crystalline structure. Controlling humidity precisely and removing excessive moisture from the interface is crucial to the printing of high‐quality and reproducible films in the air, which will undoubtedly promote the rapid commercialization of perovskite solar cells. Here, a method for high‐yield printing of perovskite films is developed using interfacial moisture as a research object. The finite element simulation reveals that interfacial moisture is the key factor affecting the quality of perovskite film formation, regardless of the ambient moisture. The results show that when the interfacial humidity is in the range of 7%–25%, the films exhibit high‐quality crystallization. The devices produced by this method exhibit a yield of 92%, indicating a promising pathway to attain highly reproducible perovskite films with superior optoelectronic properties. The air‐printing process will provide a broad guide to the commercial manufacture of high‐performance perovskite optoelectronic devices.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangxi Province
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials