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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 2
BKCSDE 33(2)
February 20, 2012 

 
Title
Chain Length Effect of Dialkoxynaphthalene End-Capped Divinylbenzene for OTFT
Author
Ran Kim, Hui-Jun Yun, Mi Hye Yi, Sung Chul Shin*, Soon-Ki Kwon,*, Yun-Hi Kim*
Keywords
Organic semiconductor, TFT (thin film transistor), Hole mobility, Chain length
Abstract
The new organic semiconductors which are composed of divinylbenzene core unit and alkoxynaphthalene on both sides, 1,4-bis-2-(6-octyloxy)naphthalen-2-ylvinylbenzene (BONVB), 1,4-bis-2-(6-decyloxy)naphthalen- 2-ylvinylbenzene (BDNVB) and 1,4-bis-2-(6-dodecyloxy)naphthalen-2-ylvinylbenzene (BDDNVB) were synthesized by Wittig reaction. The structures of obtained BONVB, BDNVB and BDDNVB were confirmed by FT-IR and mass spectroscopy. UV-absorption of thin film showed H-aggregates and J-aggregates due to closely packed structure between adjacent molecules. The characterization of vacuum-evaporated films by Xray diffraction (XRD) and atomic force microscopy (AFM) showed that the chain length of alkoxy group affects the crystallinity and morphology. BONVB with octyloxy group showed the mobility of 0.011 cm2/V·s, on/off ratio of 1.31 × 105, and a subthreshold slope of 0.93 V.
Page
420 - 125
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