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NIR absorbing D-π-A-π-D structured diketopyrrolopyrrole-dithiafulvalene based small molecule for solution processed
K Narayanaswamy1, A Venkateswararao2, Vinay Gupta3
1Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad-500007, India. spsingh@iict.res.in and Academy of Scientific and Innovative Research, CSIR-IICT, India.
Abstract:
A new low band gap small molecule with a D-π-A-π-D molecular structure composed of a dithiafulvalene (DTF) donor and a diketopyrrolopyrrole (DPP) acceptor was synthesized and tested for organic solar cells. Using the small molecule as an electron donor, and PC71BM as an acceptor a high power conversion efficiency (PCE) of 4.3% was achieved.
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