In this study,we explore an innovative approach to enhancing the photovoltaic performance of organic solar cells through core fluorination of the non-fullerene acceptor.We developed a benzotriazole-based non-fullerene...In this study,we explore an innovative approach to enhancing the photovoltaic performance of organic solar cells through core fluorination of the non-fullerene acceptor.We developed a benzotriazole-based non-fullerene acceptor with a trifluorinated phenyl side chain,referred to as YNPF3,which has a significant impact on the molecular properties,including a surprisingly varied local dipole moment and crystalline nature,as well as effectively stabilizing the frontier molecular orbital energy levels.Furthermore,a trifluorophenyl-based non-fullerene acceptor exhibits enhanced absorptivity,restricted voltage loss,and favorable photoactive morphology compared with its methyl side chain counterpart non-fullerene acceptor.Consequently,a binary organic solar cell based on YNPF3 achieves an outstanding power conversion efficiency of 19.2%,surpassing the control device with a efficiency of 16.5%.Finally,the YNPF3-based organic solar cell presents an impressive power conversion efficiency of 16.6%in a mini-module device with an aperture size of 12.5 cm^(2),marking the highest reported efficiency for series-connected binary organic solar cells with a photoactive area over 10 cm^(2).展开更多
基金supported by the National Research Foundation(NRF)(NRF-2021R1A2C2091787)by the Technology Innovation Program(RS-2024-00422305)+1 种基金funded by the Ministry of Trade,Industry&Energy,by the National Research Council of Science and Technology(Grant No.Global-23-007)by the Korea Research Institute of Chemical Technology(KRICT)(No.KS2422-10)of Republic of Korea。
文摘In this study,we explore an innovative approach to enhancing the photovoltaic performance of organic solar cells through core fluorination of the non-fullerene acceptor.We developed a benzotriazole-based non-fullerene acceptor with a trifluorinated phenyl side chain,referred to as YNPF3,which has a significant impact on the molecular properties,including a surprisingly varied local dipole moment and crystalline nature,as well as effectively stabilizing the frontier molecular orbital energy levels.Furthermore,a trifluorophenyl-based non-fullerene acceptor exhibits enhanced absorptivity,restricted voltage loss,and favorable photoactive morphology compared with its methyl side chain counterpart non-fullerene acceptor.Consequently,a binary organic solar cell based on YNPF3 achieves an outstanding power conversion efficiency of 19.2%,surpassing the control device with a efficiency of 16.5%.Finally,the YNPF3-based organic solar cell presents an impressive power conversion efficiency of 16.6%in a mini-module device with an aperture size of 12.5 cm^(2),marking the highest reported efficiency for series-connected binary organic solar cells with a photoactive area over 10 cm^(2).
