Impact of alloy-like phase on energy loss mitigation in multi-component organic photovoltaics  

作　　者：Xiangyue Kong Lingling Zhan Zhongjie Li Yaxin Yang Yuhao Liu Huayu Qiu Xiaokang Sun Hanlin Hu Rui Sun Jie Min Shouchun Yin Weifei Fu Hongzheng Chen 

机构地区：[1]Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education,College of Materials,Chemistry and Chemical Engineering,Hangzhou Normal University,Hangzhou,P.R.China [2]Hoffmann Institute of Advanced Materials,Shenzhen Polytechnic University,Shenzhen,P.R.China [3]The Institute for Advanced Studies,Wuhan University,Wuhan,P.R.China [4]State Key Laboratory of Silicon and Advanced Semiconductor Materials,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou,P.R.China

出　　处：《Aggregate》2024年第4期339-348,共10页聚集体（英文）

基　　金：Zhejiang Provincial Natural Science Foundation,Grant/Award Numbers:LQ23E030002,LZ23B040001;National Natural Science Foundation of China,Grant/Award Numbers:52303226,21971049;Hangzhou Normal University,Grant/Award Number:4095C50222204002;National Key Research and Development Program of China,Grant/Award Number:2019YFA0705902。

摘　　要：The multi-component strategy has proven effective in advancing the performance of organic photovoltaics(OPVs),enhancing photocurrent andfill factor through spectral complementarity and morphology optimization.However,the open-circuit voltage(VOC)mechanism in multi-component systems lacks systematic investiga-tion.In this study,we explore the influence of alloy-like phases on energy level distribution and energy loss mechanisms in multi-component OPVs.Appropriate modulation of donor alloy-like phases maintains the original intermolecular stack-ing,enhances component compatibility,reduces acceptor aggregation,and improves acceptor phase purity,mitigating non-radiative recombination losses.Additionally,suitable alloy-like phase modulation elevates charge transfer(CT)states,reducing the gap between CT and local exciton state,lowering reorganization energy,and alleviating radiative recombination loss below the bandgap.Through synergistic optimization(layer-by-layer method with solid additive),ternary devices based on Y6 acceptor achieve a notable 19.41%power conversion efficiency,offering new insights for the analysis of the energy loss of the multi-component OPVs.

关 键 词：alloy-like phase charge transfer state energy loss high efficiencies multi-donors 

分 类 号：TG14[一般工业技术—材料科学与工程]