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Thermally Induced Crystallization of High Quality CH 3 NH 3 PbI 3 Film with Large Grains for Highly Efficient Perovskite Solar Cells
Author(s) -
Hou Yu,
Yang Shuang,
Chen Xiao,
Li Chunzhong,
Zhao Huijun,
Yang Hua Gui
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201605693
Subject(s) - crystallization , materials science , crystallinity , perovskite (structure) , fabrication , grain size , chemical engineering , solar cell , mineralogy , optoelectronics , composite material , chemistry , medicine , alternative medicine , pathology , engineering
Recently, fully covered and smooth perovskite films could be fabricated by optimized coating methods; however, it is still hard to prepare perovskite films with large grain sizes and high crystallinity. Given the fact that thermal energy can promote crystallization, we combine high‐temperature crystallization with the application of a solvent featuring a high boiling point, in order to produce high quality perovskite films with micrometer‐sized grains. We further investigated the temperature dependence of the thermally induced synthetic strategy, whereby the grains become larger as the temperature is elevated. After solar cell device fabrication, the efficiency of the best cell can attain a high value of 15.53 % with reduced hysteresis behavior.