Bifunctional bridging capping layer enables 24.5%efficiency of perovskite solar cells with polymer-based hole transport materials  

作　　者：Can Zhu Yiyang Wang Lei Meng Beibei Qiu Jing Li Shucheng Qin Ke Hu Xin Jiang Wenbin Lai Minchao Liu Zhe Liu Chenxing Lu Jinyuan Zhang Yongfang Li 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,CAS Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]School of Chemical Science,University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Solid State Optoelectronic Devices of Zhejiang Province,College of Physics and Electronic Information Engineering,Zhejiang Normal University,Jinhua 321004,China [4]Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [5]Laboratory of Advanced Optoelectronic Materials,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China

出　　处：《Science China Chemistry》2025年第1期350-359,共10页中国科学(化学英文版)

基　　金：supported by the National Key Research and Development Program of China(2019YFA0705900);the National Natural Science Foundation of China(52103243,61904181,52173188);the Key Research Program of the Chinese Academy of Sciences(XDPB13);the Basic and Applied Basic Research Major Program of Guangdong Province(2019B030302007)。

摘　　要：Developing a bridge capping layer between perovskite and hole transport layer materials(HTMs)in the n-i-p perovskite solar cells(pero-SCs)is an effective approach to modify the morphology of HTMs and passivate the perovskite simultaneously.Herein,we select the quinoxaline-based bifunctional passivation agent,quinoxalin-6-yl-methylamine hydrochloride(Qx MACl),as the bridging layer,and a D-A copolymer PBQ12 containing the same quinoxaline unit as an HTM for the n-i-p pero-SCs.Due to theπ-πstacking among the common quinoxaline units in the bridge layer and HTM,Qx MACl induces theπ-πstacking of the PBQ12 film and improves the film morphology of HTMs with better conductivity.Additionally,Qx MACl can effectively passivate the perovskite surface,and PBQ12 possesses appropriate energy levels and high hole mobility.The pero-SCs based on FAPbI_(3)with PBQ12/Qx MACl treatment showed a higher power conversion efficiency(PCE)of 24.05%and outstanding stability,maintaining 95.4%and 92.1%of its initial PCE after 750 h of storage and after over 800 h of thermal annealing at 85℃,respectively.To further enhance the PCE of the PBQ12/Qx MACl-based devices,we developed a non-metal ion dopant for the PBQ12 HTM.Through trace doping of PBQ12 HTM by the non-metal ion dopant,the PCE of the PBQ12/Qx MACl-based devices reached 25.24%(the calibrated PCE of 24.55%by the National Institute of Metrology,China).

关 键 词：D-A copolymer hole transport materials bifunctional bridge capping layer PASSIVATION perovskite solar cells 

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]