Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 4, Pages 1096-1102Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201712011
Keywords
non-fullerene acceptors; organic solar cells; tellurophene; triplet state
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Funding
- NSFC [21774130, 51303180, 21574135]
- Beijing Municipal Natural Science Foundation [2162043]
- One Hundred Talents Program of Chinese Academy of Sciences
- University of Chinese Academy of Sciences
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Triplet materials have been employed to achieve high-performing organic solar cells (OSCs) by extending the exciton lifetime and diffusion distances, while the triplet non-fullerene acceptor materials have never been reported for bulk heterojunction OSCs. Herein, for the first time, three triplet molecular acceptors based on tellurophene with different degrees of ring fusing were designed and synthesized for OSCs. Significantly, these molecules have long exciton lifetime and diffusion lengths, leading to efficient power conversion efficiency (7.52%), which is the highest value for tellurophene-based OSCs. The influence of the extent of ring fusing on molecular geometry and OSCs performance was investigated to show the power conversion efficiencies (PCEs) continuously increased along with increasing the extent of ring fusing.
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