Details

Autor(en) / Beteiligte

• He, Chengliang
• Chen, Zeng
• Wang, Tonghui
• Shen, Ziqiu
• Li, Yaokai
• Zhou, Jiadong
• Yu, Jianwei
• Fang, Huiyu
• Li, Yuhao
• Li, Shuixing
• Lu, Xinhui
• Ma, Wei
• Gao, Feng
• Xie, Zengqi
• Coropceanu, Veaceslav
• Zhu, Haiming
• Bredas, Jean-Luc
• Zuo, Lijian
• Chen, Hongzheng

Titel

Asymmetric electron acceptor enables highly luminescent organic solar cells with certified efficiency over 18

Ist Teil von

• Nature communications, 2022-05, Vol.13 (1), p.2598-2598, Article 2598

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Enhancing the luminescence property without sacrificing the charge collection is one key to high-performance organic solar cells (OSCs), while limited by the severe non-radiative charge recombination. Here, we demonstrate efficient OSCs with high luminescence via the design and synthesis of an asymmetric non-fullerene acceptor, BO-5Cl. Blending BO-5Cl with the PM6 donor leads to a record-high electroluminescence external quantum efficiency of 0.1%, which results in a low non-radiative voltage loss of 0.178 eV and a power conversion efficiency (PCE) over 15%. Importantly, incorporating BO-5Cl as the third component into a widely-studied donor:acceptor (D:A) blend, PM6:BO-4Cl, allows device displaying a high certified PCE of 18.2%. Our joint experimental and theoretical studies unveil that more diverse D:A interfacial conformations formed by asymmetric acceptor induce optimized blend interfacial energetics, which contributes to the improved device performance via balancing charge generation and recombination.