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

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 asymm...

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Published in:Nature communications Vol. 13; no. 1; pp. 2598 - 11
Main Authors: 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
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 11.05.2022
Nature Publishing Group
Nature Portfolio
Subjects:
119/118
140/131
639/301/1005/1007
639/4077/4072/4062
639/4077/909/4101/4096/946
Asymmetric structures
Efficiency
Electroluminescence
Energy conversion efficiency
Fullerenes
Humanities and Social Sciences
Luminescence
multidisciplinary
Photovoltaic cells
Quantum efficiency
Recombination
Science
Science (multidisciplinary)
Solar cells
ISSN:2041-1723, 2041-1723
Online Access:Get full text
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Summary: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. High-performance organic solar cells call for novel designs of acceptor molecules. Here, He et al. design and synthesize a non-fullerene acceptor with an asymmetric structure for diverse donor:acceptor interfacial conformations and report a certificated power conversion efficiency of 18.2%.
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ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-022-30225-7