Non-Fullerene-Based Inverted Organic Photovoltaic Device with Long-Term Stability  

作　　者：Do Hui Kim Febrian T.A.Wibowo Dongchan Lee Narra V.Krishna Sujung Park Shinuk Cho Sung-Yeon Jang 

机构地区：[1]Department of Physics and Energy Harvest Storage Research Center,University of Ulsan,Ulsan 44610,Republic of Korea [2]School of Energy and Chemical Engineering,Ulsan National Institute of Science and Technology(UNIST),50 UNIST-gil,Ulsan 44919,Republic of Korea

出　　处：《Energy & Environmental Materials》2023年第3期214-221,共8页能源与环境材料（英文）

基　　金：supported by a National Research Foundation of Korea(grant#:2020R1A2C1003929,2019R1A6A1A11053838,2020M1A2A2080746,2021M2E8A1044198,2016R1A5A1012966,2021M3H4A1A03051379).

摘　　要：In this work,we developed the PM6:Y6-based inverted structure organic photovoltaic(i-OPV)with improved power conversion efficiency(PCE)and long-term stability by resolving the origins of the performance deterioration.The deep defects between the metal oxide-based electron transport layer and bulk-heterojunction photoactive layer interface were responsible for suboptimal PCE and facilitated degradation of devices.While the density of deep traps is increased during the storage of i-OPV,the penetrative oxygen-containing defects additionally generated shallow traps below the band-edge of Y6,causing an additional loss in the open-circuit voltage.The suppression of interfacial defects by chemical modification effectively improved the PCE and long-term stability of i-OPV.The modified i-OPV(mi-OPV)achieved a PCE of 17.42%,which is the highest value among the reported PM6:Y6-based i-OPV devices.Moreover,long-term stability was significantly improved:~90%and~80%retention of its initial PCE after 1200 h of air storage and illumination,respectively.

关 键 词：deep trap inverted structure long-term stability organic photovoltaic power conversion efficiency 

分 类 号：TB34[一般工业技术—材料科学与工程]