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Drop‐Casting to Make Efficient Perovskite Solar Cells under High Humidity
Author(s) -
Zuo Chuantian,
Ding Liming
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202101868
Subject(s) - humidity , materials science , drop (telecommunication) , casting , chemical engineering , perovskite (structure) , crystal (programming language) , crystal growth , composite material , crystallography , chemistry , meteorology , mechanical engineering , computer science , physics , engineering , programming language
Drop‐casting was used to make MAPbI 3 films for solar cells. The crystal growth in drop‐cast MAPbI 3 films was regulated by adjusting temperature. A mechanism for the formation of different morphology was proposed by combining in situ crystal‐growth study with XRD measurements. The crystals in the films made at low temperature (60 °C) and high temperature (≥120 °C) are (110) and (200) oriented, respectively. The different crystal growth mode leads to quite different film morphology. Compared with spin‐coating, drop‐casting shows much better tolerance to humidity. MAPbI 3 solar cells made under 88 % humidity delivered a PCE of 18.17 %, which is the highest PCE for perovskite solar cells made under >70 % humidity without antisolvent assistance.