Multifunctional dual-anion compensation of amphoteric glycine hydrochloride enabled highly stable perovskite solar cells with prolonged carrier lifetime  

作　　者：Lina Qin Mengfei Zhu Yuren Xia Xingkai Ma Daocheng Hong Yuxi Tian Zuoxiu Tie Zhong Jin 

机构地区：[1]State Key Laboratory of Coordination Chemistry,MOE Key Laboratory of Mesoscopic Chemistry,MOE Key Laboratory of High Performance Polymer Materials and Technology,Jiangsu Key Laboratory of Advanced Organic Materials,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China [2]Nanjing Tieming Energy Technology Co.Ltd.,Nanjing 210093,China [3]Suzhou Tierui New Energy Technology Co.Ltd.,Suzhou 215228,China

出　　处：《Nano Research》2024年第6期5131-5137,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.22022505);the Fundamental Research Funds for the Central Universities of China(Nos.0205-14380266,0205-14380272,and 0205-14380274);the General project of the Joint Fund of Equipment Pre-research and the Ministry of Education(No.8091B02052407);the Scientific and Technological Innovation Special Fund for Carbon Peak and Carbon Neutrality of Jiangsu Province(No.BK20220008);the Scientific and Technological Achievements Transformation Special Fund of Jiangsu Province(No.BA2023037);the International Collaboration Research Program of Nanjing City(Nos.202201007 and 2022SX00000955);the Gusu Leading Talent Program of Scientific and Technological Innovation and Entrepreneurship of Wujiang District in Suzhou City(No.ZXL2021273).

摘　　要：Throughout years,the two-step spin-coating process is the most common method to prepare organic lead halide perovskite materials.However,the short reaction time of dropping the solution at the second step means that PbI2 cannot be completely transformed into perovskite phase.To solve this problem,we report the introduction of glycine hydrochloride(GlyHCl)into the second step of the two-step spin-coating process to prepare a FA_(0.9)MA_(0.1)PbI_(3-x)%-GlyHCl perovskite material(namely FAMA-x%-GlyHCl,where FA=formamidinium,MA=methylammonium,and x%stands for the molar ratio of GlyHCl added in FA iodide/MA iodide(FAI/MAI)precursor solution).The Cl−ion in GlyHCl assists the formation ofα-phase perovskite,and the-COO−group coordinates with Pb2+cation in a bridging way,making up for the anion vacancy in perovskite lattice and resulting in high absorption intensity.The perovskite solar cells(PSCs)based on FAMA-9%-GlyHCl achieve a long carrier lifetime(527.0 ns),a photoelectric conversion efficiency(PCE)of 19.40%and good thermal stability,maintaining 85.8%of the initial PCE after being continuously heated at 60℃for 500 h.This study helps to solve the problem of incomplete reaction in the two-step spin-coating process and puts forward a new solution for preparing high coverage perovskite films with large grain size.

关 键 词：dual-anion compensation glycine hydrochloride perovskite solar cells carrier lifetime thermal and moisture stability 

分 类 号：O61[理学—无机化学]