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Methane-perylene diimide-based small molecule acceptors for high efficiency non-fullerene organic solar cells

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Abstract

We report perylene diimide (PDI) small molecules based on diphenylmethane, triphenylmethane, and tetraphenylmethane cores, named PM-PDI2, PM-PDI3 and PM-PDI4, respectively. The OSC performances of PM-PDI3 and PM-PDI4 are comparable. The PM-PDI3 based device with PDBT-T1 as the donor achieved a highest power conversion efficiency (PCE) of 7.58% along with a high open-circuit voltage (VOC) of 0.98 V, a short-circuit current density (JSC) of 11.02 mA cm−2 and a high fill factor (FF) of 69.9%, a 1.32 times boost in PCE with respect to the PM-PDI2 based control device (3.26%). The high photovoltaic performance of the PM-PDI3 based device can be attributed to its relatively high-lying LUMO level, complementary absorption spectra with the polymer donor material PDBT-T1, relatively favorable morphology and improved exciton dissociation and charge collection efficiency. A PCE of 7.58% is among the highest efficiency of phenyl-methane as core based non-fullerene organic solar cells. Overall, this work provides a new approach to enhance the performance of non-fullerene acceptors.

Graphical abstract: Methane-perylene diimide-based small molecule acceptors for high efficiency non-fullerene organic solar cells

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Publication details

The article was received on 27 Jun 2019, accepted on 09 Aug 2019 and first published on 12 Aug 2019


Article type: Paper
DOI: 10.1039/C9TC03457A
J. Mater. Chem. C, 2019, Advance Article

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    Methane-perylene diimide-based small molecule acceptors for high efficiency non-fullerene organic solar cells

    G. Li, W. Yang, S. Wang, T. Liu, C. Yan, G. Li, Y. Zhang, D. Li, X. Wang, P. Hao, J. Li, L. Huo, H. Yan and B. Tang, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC03457A

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