Effect of concomitant anti-solvent engineering on perovskite grain growth and its high efficiency solar cells

作     者：Tong Liu Xiaofei Dong Juncong Li Hongli Liu Shirong Wang Xianggao Li 刘桐;董晓菲;黎俊聪;刘红丽;王世荣;李祥高

作者机构：School of Chemical Engineering and TechnologyTianjin UniversityTianjin300350China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin300072China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2021年第64卷第2期

页      面：267-276页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(21676188) the Science and Technology Plan Project of Tianjin(19ZXNCGX00020) the National Key R&D Program of China(2016YFB0401303) 

主　　题：anti-solvent vapor annealing perovskite grains secondary growth defect passivation solar cells 

摘      要：The grain boundaries and interface properties in the active layers of perovskite solar cells(PSCs)are important factors affecting the performances of the *** this work,a simple and fast concomitant annealing process is established by inducing the secondary growth of the grains using the anti-solvent o-dichlorobenzene(o-PhCl2)or chlorobenzene(PhCl)to suppress the volatilization of solvent molecules during the FA0.80MA0.15Cs0.05Pb(I0.85Br0.15)3(FA,CH5N2+,formamidine;MA,CH3NH3+,methylamine)film annealing *** effects of anti-solvent molecules on the phase transformation,grain boundary fusion and morphology evolution of perovskite films are systematically investigated by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The results indicate that anti-solvent molecules can inhibit solvent evaporation in the active layers and promote crystallite dissolution and ordered secondary growth along the surfaces of large *** can promote the formation of large grains and the passivation of surface defects,and can be favorable for the separation and transportation of photocarriers in the active ***,the power conversion efficiency(PCE)of PSCs can be effectively improved,with a PCE of 20.72%being achieved by a secondary growth perovskite film optimized with ***,the efficiency remains at 85%of its initial value after 2400 h of treatment in a natural indoor environment with a relative humidity of 45±5%.