Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 45, Issue -, Pages 338-348Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2016.10.001
Keywords
Organic photovoltaic cell (OPV); Organic solar cell; Diketopyrrolopyrrole (DPP); Thiophene; Acceptor
Funding
- National Research Foundation of Korea (NRF) - Korean Government (MSIP) [NRF-2015R1A1A3A04001498]
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We report the synthesis of a series of A1-pi-A2-pi-A1-type small molecules, DPP2T-RH, DPPFT-RH, and DPPT-RH, in which thiophene and furan were introduced to bridge the two strong electron-withdrawing units of DPP and rhodanine (RH). Interestingly, these DPP-RH-based small molecules exhibited ambipolar characteristics, showing photovoltaic performance both as donors and acceptors in combination with PC71BM and P3HT, respectively. The best power conversion efficiencies were obtained from DPPFT-RH (1.77%) and DPP2T-RH (1.28%) as donor and acceptor, respectively. Their physical properties, film packing ability, and photovoltaic performances were fine-tuned by rational design of pi-bridges. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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