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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 4
BKCSDE 34(4)
April 20, 2013 

A Benzodithiophene-based Semiconducting Polymer for Organic Thin Film Transistor
Jung-A Hong, Ran Kim, Hui-Jun Yun, Joung-Man Park, Sung Chul Shin, Yun-Hi Kim*
Organic semiconductor, Organic thin film transistors (OTFTs), Benzodithiophene
Benzodithiophene based organic semiconducting polymer was designed and synthesized by stille coupling reaction. The structure of polymer was confirmed by NMR and IR. The weight average molecular weight (Mw) of polymer was 8,400 using GPC with polydispersity index of 1.4. The thermal, optical and electrochemical properties of polymer were characterized by TGA and DSC, UV-vis absorption and cyclic voltammetry. OTFT device using PBDT-10 exhibited the mobility of 7.2 × 10−5 cm2 V−1 s−1 and Ion/Ioff of 2.41 × 103. The film morphology and crystallinity of PBDT-10, was studied using AFM and XRD.
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