Impact of alloy‐like phase on energy loss mitigation in multi‐component organic photovoltaics
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
Affiliations
Xiangyue Kong
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Lingling Zhan
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Zhongjie Li
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Yaxin Yang
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Yuhao Liu
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Huayu Qiu
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Xiaokang Sun
Hoffmann Institute of Advanced Materials Shenzhen Polytechnic University Shenzhen P. R. China
Hanlin Hu
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Rui Sun
The Institute for Advanced Studies Wuhan University Wuhan P. R. China
Jie Min
The Institute for Advanced Studies Wuhan University Wuhan P. R. China
Shouchun Yin
Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of EducationCollege of Materials, Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou P. R. China
Weifei Fu
State Key Laboratory of Silicon and Advanced Semiconductor MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou P. R. China
Hongzheng Chen
State Key Laboratory of Silicon and Advanced Semiconductor MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou P. R. China
Abstract The multi‐component strategy has proven effective in advancing the performance of organic photovoltaics (OPVs), enhancing photocurrent and fill factor through spectral complementarity and morphology optimization. However, the open‐circuit voltage (VOC) mechanism in multi‐component systems lacks systematic investigation. 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 stacking, 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.
