Curing the vulnerable heterointerface via organic-inorganic hybrid hole transporting bilayers for efficient inverted perovskite solar cells  

作　　者：Kangrong Yan Ziqiu Shen Yanchun Huang Benfang Niu Hongzheng Chen Chang-Zhi Li 

机构地区：[1]State Key Laboratory of Silicon and Advanced Semiconductor Materials,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027,China

出　　处：《Chinese Chemical Letters》2024年第6期254-257,共4页中国化学快报（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.22125901);the National Key Research and Development Program of China(No.2019YFA0705900);the Fundamental Research Funds for the Central Universities(No.226-2023-00113)。

摘　　要：To promote the practices of perovskite photovoltaics,it requires to develop efficient perovskite solar cells(PVSCs)standing long-time operation under the adverse environments.Herein,we demonstrate that the tailor-made conjugated polymers as conductive adhesives stabilized the originally redox-reactive heterointerface between perovskite and metal oxide,facilitating the access of efficient and stable inverted PVSCs.It was revealed that bithiophene and phenyl alternating conjugated polymers with partial glycol chains atop of the metal oxide layer has resulted in effective organic-inorganic hybrid hole transporting bilayers,which allow maintaining efficient hole extraction and transport,meanwhile preventing halide migration to directly contact with the nickel oxide(NiO_(x))layer.As a result,the corresponding inverted PVSCs with the organic-inorganic hole transporting bilayers have achieved an excellent power conversion efficiency of 23.22%,outperforming 20.65% of bare NiO_(x)-based devices.Moreover,the encapsulated PVSCs with organic-inorganic bilayers exhibited the excellent photostability with 91% of the initial efficiency after 1000-h one-sun equivalent illumination in ambient conditions.Overall,this work provides new insights into stabilizing the vulnerable heterointerface for perovskite solar cells.

关 键 词：Perovskite solar cells Conjugated polymer Hole transporting bilayer Charge extraction Heterointerface degradation 

分 类 号：TB34[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]