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A New Dithienopyridine-Based Polymer for an Organic Electronics

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A new dithienopyridine-based copolymer (PDT-TBT) was designed and synthesized. The copolymer showed good solubility in chloroform, chlorobenzene, and dichlorobenzene. The thermogravimetric analysis curve showed that the copolymer had good thermal stability with weight loss of less than 5% at 341 °C. The UV absorption maximum of the polymer appeared at 550 nm in solution and 600 nm in the film. The HOMO and LUMO of the copolymer were -5.50 eV and -3.63 eV, respectively. The copolymer exhibited the best performance when the PC61BM ratio was 1:2 (w/w %), with a J SC of 3.56 mA/cm2, a V OC of 0.45 V, an FF of 0.27%, and a PCE of 0.43%. A thin film transistor with PDT-TBT as the active layer showed mobility of 5.02×10-3 cm2/Vs, an on/off ratio of 1.19×105 and a threshold voltage of -22.75 V.

Keywords: Dithienopyridine-Based Copolymer; Mobility; Organic Photovoltaic (OPV); Organic Thin Film Transistor (OTFT); Power Conversion Efficiency

Document Type: Research Article

Affiliations: 1: Department of Chemistry, Gyeongsang National University, Jin-ju, 660-701, Republic of Korea 2: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST) Ulsan 689-798, South Korea 3: Department of Materials Engineering, Convergence Technology and Institute for Green Energy Convergence Technology (RIGET), Gyeongsang National University, Jin-ju, 660-701, Korea Republic of Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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