Manipulating the film morphology evolution toward green solvent-processed perovskite solar cells  

作　　者：Shiqi Shan Yaokai Li Haotian Wu Tianyi Chen Benfang Niu Yingzhu Zhang Di Wang Chenxia Kan Xuegong Yu Lijian Zuo Hongzheng Chen 

机构地区：[1]State Key Laboratory of Silicon Materials,MOE Key Laboratory of Macromolecular Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou,P.R.China [2]State Key Laboratory of Silicon Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou,P.R.China [3]Zhejiang University-Hangzhou Global Scientific and Technological Innovation Center,Hangzhou,P.R.China

出　　处：《SusMat》2021年第4期537-544,共8页可持续发展材料（英文）

基　　金：This work was supported by the National Natural Sci-ence Foundation of China(Grant Nos.51961145301,51620105006,and 61721005);the National Key Research and Development Program of China(No.2019YFA0705900).

摘　　要：High-performance perovskite solar cells(PVSCs)with low energy consumption and green processing are highly desired,but constrained by the difficulty in morphology control and the poor understanding on morphology evolution mechanisms.To address this issue,here we studied the effect of antisolvents on the perovskite film formation.We found that both the antisolvents and the perovskite composition affect the perovskite film morphology greatly via influencing the intermediate phase,and different perovskite compositions require different antisolvents to reach the optimal morphology.This provides the opportunity to achieve high-performance PVSCs with green antisolvent,that is,isopropanol(iPA)by changing the perovskite compositions,and leads to a powerconversionefficiency(PCE)of 21.50% for PVSCs based on MA_(0.6)FA_(0.4)PbI_(3).Further,we fabricated“fully green”PVSCs with all layers prepared by green sol-vents,and the optimal PCE can reach 19%,which represents the highest among PVSCs with full-green processing.This work provides insight into the perovskite morphology evolution and paves the way toward“green”processing PVSCs.

关 键 词：green antisolvent morphology evolution perovskite solar cells 

分 类 号：O61[理学—无机化学]