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Asymmetric A–D–π–A-type nonfullerene small molecule acceptors for efficient organic solar cells
2019/8/28 16:00:56

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Recently, Yanming Sun's research team from Beihang University did some research on Fullerene and they published a paper on Journal of Materials Chemistry A named "Asymmetric A–D–π–A-type nonfullerene small molecule acceptors for efficient organic solar cells". In this paper, they introduced the usage of fullerene in solar cells. This can be a guidance in similar experiments.

There has been significant progress with regard to research on nonfullerene small molecule acceptors (SMAs) during the past several years. Typically, high-performance nonfullerene SMAs are based on symmetric A–D–A or A–π–D–π–A structural frameworks. In this study, a novel asymmetric nonfullerene SMA, TTPT-T-2F, with an A–D–π–A structure is rationally designed and synthesized. In addition, a symmetric A–D–A-type nonfullerene SMA, IT-2F, and a symmetric A–π–D–π–A-type nonfullerene SMA, T-TPT-T-2F, are also synthesized for comparison. When PBT1-C is employed as a polymer donor, a promising power conversion efficiency (PCE) of 12.71% is achieved for TTPT-T-2F-based organic solar cells (OSCs), which surpasses those of devices based on IT-2F (PCE = 10.54%) and T-TPT-T-2F (PCE = 10.71%). Favorable phase separation toward efficient and more balanced charge transport accounts for the higher PCE achieved in the PBT1-C:TTPT-T-2F device. There results demonstrate that a small molecule acceptor with an A–D–π–A structural framework is a promising class of nonfullerene acceptors for OSCs.

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You might as well click the full text link below to exhaustively know more.

https://pubs.rsc.org/en/content/articlelanding/2019/ta/c9ta06476a#!divAbstract

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