A New Dithienopyridine-Based Polymer for an Organic Electronics

作者：Sun Cheng; Song Seyeong; Song Hyeng Gun; Park So Min; Kim Jin Young; Kim Yun Hi^*; Kwon Soon Ki^*

来源：Journal of Nanoscience and Nanotechnology, 2017, 17(8): 5792-5795.

DOI：10.1166/jnn.2017.14180

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

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 degrees 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/cm(2), a VOC 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 5.02x10(-3) cm(2)/Vs, an on/off ratio of 1.19x10(5) and a threshold voltage of -22.75 V.

• 出版日期2017-8