Статья

Origins of the open-circuit voltage in ternary organic solar cells and design rules for minimized voltage losses

Yuming WangDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SwedenJianwei YuDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SwedenRui ZhangDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SwedenJun YuanCollege of Chemistry and Chemical Engineering, Central South University, Changsha, People’s Republic of ChinaSandra HultmarkDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SwedenCatherine JohnsonDepartment of Chemistry and Centre for Processible Electronics, Imperial College London, London, United KingdomNathaniel P. GallopDepartment of Chemistry and Centre for Processible Electronics, Imperial College London, London, United KingdomBernhard SiegmundIMOMEC Division, IMEC, Diepenbeek, BelgiumDeping QianDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SwedenHuotian ZhangDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SwedenYingping ZouCollege of Chemistry and Chemical Engineering, Central South University, Changsha, People’s Republic of ChinaMartijn KemerinkDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SwedenArtem A. BakulinDepartment of Chemistry and Centre for Processible Electronics, Imperial College London, London, United KingdomChristian MüllerDepartment of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SwedenKoen VandewalIMOMEC Division, IMEC, Diepenbeek, BelgiumXiankai ChenInstitute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, People’s Republic of ChinaFeng GaoDepartment of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, Sweden

2023en

ABI

Аннотация

Abstract The power conversion efficiency of ternary organic solar cells (TOSCs), consisting of one host binary blend and one guest component, remains limited by large voltage losses. The fundamental understanding of the open-circuit voltage ( V OC ) in TOSCs is controversial, limiting rational design of the guest component. In this study, we systematically investigate how the guest component affects the radiative and non-radiative related parts of V OC of a series of TOSCs using the detailed balanced principle. We highlight that the thermal population of charge-transfer and local exciton states provided by the guest binary blend (that is, the guest-component-based binary blend) has a significant influence on the non-radiative voltage losses. Ultimately, we provide two design rules for enhancing the V OC in TOSCs: high emission yield for the guest binary blend and similar charge-transfer-state energies for host/guest binary blends; high miscibility of the guest component with the low gap component in the host binary blend.

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Идентификаторы

DOI: 10.1038/s41560-023-01309-5

Цитирования и источники

Цитирований: 2Использованных источников: 0

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