A facile solution processed ZnO@ZnS core–shell nanorods arrays for high-efficiency perovskite solar cells with boosted stability  

作　　者：Kun Chen Weijian Tang Yu Chen Ruihan Yuan Yinhua Lv Wenjuan Shan Wen-Hua Zhang 

机构地区：[1]Sichuan Research Center of New Materials,Institute of Chemical Materials,China Academy of Engineering Physics,596 Yinhe Road,Chengdu 610200,Sichuan,China [2]Tongwei Solar(Chengdu)Co.,LTD,888 Linjiaci Road,Chengdu 610200,Sichuan,China [3]Institute of Chemistry for Functionalized Materials,College of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116029,Liaoning,China

出　　处：《Journal of Energy Chemistry》2021年第10期553-560,I0014,共9页能源化学（英文版）

基　　金：support from the National Natural Science Foundation of China(Grant Nos.21773218);the key research and development projects of Sichuan province(Grant No.2017GZ0052);the talents of science and technology innovation in Sichuan province(Grant No.2018RZ0119);the China Postdoctoral Science Foundation(Grant No.2019 M653485);Anshan Hifichem Co.Ltd.

摘　　要：Zinc Oxide(ZnO)has been extensively applied as electron transport material(ETM)in perovskite solar cells(PSCs)since the emergence of PSCs.However,some chemisorbed oxygen species on the surface of ZnO can cause the degradation of CH3NH3+(MA^(+))based perovskite.To avoid the destructive effect of ZnO,a facile solution strategy was proposed to produce a ZnS shell around the ZnO nanorods arrays(ZnO-NRs),i.e.ZnO@ZnS core-shell nanorods(ZnO-NRs@ZnS).The ZnO-NRs@ZnS cascade structure can not only facilitate carrier transport,but also enhance the stability of ZnO based PSCs.A power conversion efficiency(PCE)of 20.6%was finally yielded,which is the-state-of-the-art efficiency for PSCs with one-dimensional(1 D)ZnO electron transport materials(ETMs).Moreover,over 90%of the initial efficiency was retained for the unencapsulated device with ZnO-NRs@ZnS ETMs at 85℃for 500 h,demonstrating excellent stability.This work provides a simple and efficient avenue to simultaneously enhance the photovoltaic(PV)performance and stability of 1 D ZnO nanostructure-based PSCs.

关 键 词：Zinc Oxide nanorods arrays Core-cell structure Electron transport material Perovskite solar cells STABILITY 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]