Application of an amphipathic molecule at the NiO_(x)/perovskite interface for improving the efficiency and long-term stability of the inverted perovskite solar cells  

作　　者：Guibin Shen Hongye Dong Fan Yang Xin Ren Ng Xin Li Fen Lin Cheng Mu 

机构地区：[1]Key Laboratory of Advanced Light Conversion Materials and Biophotonics,Department of Chemistry,Renmin University of China,Beijing 100872,China [2]Solar Energy Research Institute of Singapore(SERIS),National University of Singapore,Singapore 117574,Singapore [3]State Key Laboratory of Materials Processing and Die&Mold Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China [4]Department of Chemistry,National University of Singapore,3 Science Drive 3,Singapore 117574,Singapore

出　　处：《Journal of Energy Chemistry》2023年第3期454-462,I0013,共10页能源化学（英文版）

基　　金：supported by the National Key Research and Development Program of China(2018YFA0208701);the National Natural Science Foundation of China(21773308);the Research Funds of Renmin University of China(2017030013,201903020 and 20XNH059);the Fundamental Research Funds for Central Universities(China);supported by the Solar Energy Research Institute of Singapore(SERIS) at the National University of Singapore(NUS);supported by NUS;the National Research Foundation Singapore(NRF);the Energy Market Authority of Singapore(EMA);the Singapore Economic Development Board(EDB);the financial support from the China Scholarship Council(CSC) funding。

摘　　要：The presence of defects and detrimental reactions at NiO_(x)/perovskite interface extremely limit the efficiency performance and long-term stability of the perovskite solar cells(PSCs) based on NiO_(x).Herein,an amphipathic molecule Triton X100(Triton) is modified on the NiO_(x)surface.The hydrophilic chain of Triton as a Lewis base additive can coordinate with the Ni3+on the NiO_(x)surface which can passivate the interfacial defects and hinder the detrimental reactions at the NiO_(x)/perovskite interface.Additionally,the hydrophobic chain of Triton protrudes from the NiO_(x)surface to prevent moisture from penetrating into the NiO_(x)/perovskite interface.Consequently,the NiO_(x)/Triton-based devices(MAPbI3as absorbing layer) show superior moisture and thermal stability,retaining 88.4% and 64.3% of the initial power conversion efficiency after storage in air(40%-50% relative humidity(RH)) at 25 ℃ for 1070 h and in N2at 85℃ for 800 h,respectively.Moreover,the efficiency increases from 17.59% to 19.89% because of the passivation defect and enhanced hole-extraction capability.Besides,the NiO_(x)/Triton-based PSCs with Cs_(0.05)(MA_(0.15)FA_(0.85))_(0.95)Pb(I_(0.85)Br_(0.15))3perovskite as the light-absorbing layer also exhibits better moisture and thermal stability compared to the control devices,indicating the viability of our strategies.Of particular note,a champion PCE of 22.35% and 20.46% was achieved for small-area(0.1 cm^(2)) and large-area(1.2 cm^(2)) NiO_(x)/Triton-based devices,respectively.

关 键 词：Perovskite solar cells NiO_(x) Defect passivation Long-term stability Amphipathic molecule 

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