Triplet Tellurophene‐Based Acceptors for Organic Solar Cells

Publisher： John Wiley & Sons Inc

E-ISSN： 1521-3757|130|4|1108-1114

ISSN： 0044-8249

Source： ANGEWANDTE CHEMIE, Vol.130, Iss.4, 2018-01, pp. : 1108-1114

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Abstract

AbstractTriplet 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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