Solution-processable perylene diimide based star-shaped small molecule acceptor: synthesis and photovoltaic properties

Xin Zhang; Bo Jiang; Shaoqing Zhang; Jianhui Hou; Jiannian Yao; Chuanlang Zhan

doi:10.1117/12.2058421

6 October 2014 Solution-processable perylene diimide based star-shaped small molecule acceptor: synthesis and photovoltaic properties

Xin Zhang, Bo Jiang, Shaoqing Zhang, Jianhui Hou, Jiannian Yao, Chuanlang Zhan

Author Affiliations +

Proceedings Volume 9184, Organic Photovoltaics XV; 91840C (2014) https://doi.org/10.1117/12.2058421
Event: SPIE Organic Photonics + Electronics, 2014, San Diego, California, United States

Abstract

Previously we have reported a series of perylene dimide (PDI) dimers as efficient solution-processible small molecule acceptors. In this paper we present a new solution-processible PDI trimer with triphenylamine as the romatic bridge. This trimer was synthesized by Suzuki coupling reaction and fully characterized with ¹H-NMR, ¹³C-NMR, TOF-MS, and elementary analysis. It exhibits a broad absorption band in the wavelength range from 450 to 650 nm with a peak round 533 nm and a maximum extinction coefficient of 9.61 × 10⁴ M^-1 cm^-1. Its lowest unoccupied and highest occupied molecular orbit (LUMO and HOMO) energies are −3.75 and −5.60 eV. When blend with the commercial P3HT, it gives an open-circuit voltage (V_oc) of 0.73 V, a short-circuit current-density (J_sc) of 0.60 mA/cm², a fill-factor (FF) of 51.0% and an efficiency of 0.22%. When utilizing the conjugated polymer of PBDTTT-C-T as the donor and 5% DIO as the additive, the best conventional cell yields 1.82% efficiency with a V_oc of 0.99 V, a J_sc of 3.44 mA/cm², and an FF of 53.0%.

Citation Download Citation

Xin Zhang, Bo Jiang, Shaoqing Zhang, Jianhui Hou, Jiannian Yao, and Chuanlang Zhan "Solution-processable perylene diimide based star-shaped small molecule acceptor: synthesis and photovoltaic properties", Proc. SPIE 9184, Organic Photovoltaics XV, 91840C (6 October 2014); https://doi.org/10.1117/12.2058421

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