Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Publication date: 6th February 2020
Two D-π-A-π-D type thiadiazole [3,4-c] pyridine-based small molecules were designed and synthesized for solution-processed organic photovoltaics (OPVs), namely, TP1 and TP2. The molecules were confirmed by mass spectrometer, 1H and 13C NMR. The optical and electrochemical studies of TP1 and TP2 reveal the energy band gaps, HOMO and LUMO energy levels were 1.67, 1.69 eV, -5.07, -5.22 eV and -3.40, -3.53 eV, respectively. Both molecules show intense absorption from 300 to 700 nm wavelength region covering the solar spectrum effectively. In order to investigate the photovoltaic properties of these two donors, fullerene derivatives are used as acceptors to fabricate bulk heterojunction devices. In addition, we add solvent additive in the active layer to control the morphology during solution processing, and intend to improve device performance.The device fabrication and further optimization are currently in progress for OPV applications with high efficiency and low cost.
This work has been partially supported by the NANOTEC, NSTDA, Ministry of Science and Technology, Thailand.
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