Overcoming Perovskite Corrosion and De-Doping Through Chemical Binding of Halogen Bonds Toward Efficient and Stable Perovskite Solar Cells  

作　　者：Guanhua Ren Wenbin Han Qiang Zhang Zhuowei Li Yanyu Deng Chunyu Liu Wenbin Guo 

机构地区：[1]State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,2699 Qianjin Street,Changchun 130012,People’s Republic of China

出　　处：《Nano-Micro Letters》2022年第11期62-74,共13页纳微快报（英文版）

基　　金：the National Natural Science Foundation of China(62175084,62005093);Industrial Technology Research and Development Project of Jilin Province (2020C026-5) for the support to this work.

摘　　要：4-tert-butylpyridine(TBP)is an indispensable additive for the hole transport layer in highly efficient perovskite solar cells(PSCs),while it can induce corrosion decomposition of perovskites and de-doping effect of spiro-OMeTAD,which present huge challenge for the stability of PSCs.Herein,halogen bonds provided by 1,4-diiodotetrafluorobenzene(1,4-DITFB)are employed to bond with TBP,simultaneously preventing perovskite decomposition and eliminating de-doping effect of oxidized spiro-OMeTAD.Various characterizations have proved strong chemical interaction forms between 1,4-DITFB and TBP.With the incorporation of halogen bonds,perovskite film can maintain initial morphology,crystal structure,and light absorbance;meanwhile,the spiro-OMeTAD film shows a relatively stable conductivity with good charge transport property.Accordingly,the device with TBP complex exhibits significantly enhanced stability in N_(2) atmosphere or humidity environment.Furthermore,a champion power conversion efficiency of 23.03%is obtained since perovskite is no longer damaged by TBP during device preparation.This strategy overcomes the shortcomings of TBP in n-i-p PSCs community and enhances the application potential of spiro-OMeTAD in fabricating efficient and stable PSCs.

关 键 词：4-tert-butylpyridine CORROSION De-doping Chemical binding Stability 

分 类 号：TM914.4[电气工程—电力电子与电力传动]