Understanding the correlation between energy-state mismatching and open-circuit voltage loss in bulk heterojunction solar cells

作     者：Hyun-Seock Yang Danbi Kim Chang-Mok Oh Vellaiappillai Tamilavan Pesi MHangoma Hojun Yi Bo RLee Insoo Shin In-Wook Hwang Sung Heum Park 

作者机构：Pukyong National UniversityBusanRepublic of Korea Clarendon LaboratoryUniversity of OxfordOxfordUK Institute of Energy Transport and Fusion ResearchPukyong National UniversityBusanRepublic of Korea Advanced Photonics Research InstituteGwangju Institute of Science and TechnologyGwangjuRepublic of Korea Department of Chemical and Biomolecular EngineeringTandon School of EngineeringNew York UniversityBrooklynNew YorkUSA 

出 版 物：《Carbon Energy》 (碳能源（英文）)

年 卷 期：2024年第6卷第5期

页      面：164-174页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：National Research Foundation of Korea,Grant/Award Number:2022R1A6A1A03051158 BrainLink Program,Grant/Award Number:2022H1D3A3A01077343 Nano Material Technology Development Program,Grant/Award Number:2021M3H4A1A02057007 

主　　题：bulk heterojunction open circuit voltage organic photovoltaics photoinduced charge transfer voltage loss 

摘      要：Photoinduced intermolecular charge transfer(PICT)determines the voltage loss in bulk heterojunction(BHJ)organic photovoltaics(OPVs),and this voltage loss can be minimized by inducing efficient PICT,which requires energy-state matching between the donor and acceptor at the BHJ ***,both geometrically and energetically accessible delocalized state matching at the hot energy level is crucial for achieving efficient *** this study,an effective method for quantifying the hot state matching of OPVs was *** degree of energy-state matching between the electron donor and acceptor at BHJ interfaces was quantified using a mismatching factor(MF)calculated from the modified optical density of the ***,the correlation between the open-circuit voltage(Voc)of the OPV device and energy-state matching at the BHJ interface was investigated using the calculated *** OPVs with small absolute MF values exhibited high Voc *** result clearly indicates that the energy-state matching between the donor and acceptor is crucial for achieving a high Voc in *** the MF indicates the degree of energy-state matching,which is a critical factor for suppressing energy loss,it can be used to estimate the Voc loss in OPVs.