Synthesis and characterization of poly(benzodithiophene) derivative for organic thin film transistors

被引:37
作者
Dang, Thi Tuyet Mai
Park, Sung-Jin
Park, Jong-Won
Chung, Dae-Sung
Park, Chan Eon
Kim, Yun-Hi
Kwon, Soon-Ki [1 ]
机构
[1] Gyeongsang Natl Univ, Sch Nanoadv Mat, Chinju 660701, South Korea
[2] Gyeongsang Natl Univ, Engn Res Inst, Chinju 660701, South Korea
[3] Postech, Dept Chem Engn, Pohang 090084, South Korea
[4] Gyeongsang Natl Univ, Dept Chem, Chinju 660701, South Korea
关键词
benzodithiophene; conducting polymers; OTFT; oxidative polymerization; solution properties; spin coating; thiophene;
D O I
10.1002/pola.22272
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly{2,6-bis(3-dodecylthiophen-2-yl)benzo[1,2-b;4,5-b']dithiophene] (PTBT) was synthesized, via oxidative polymerization by oxidative agent (FeCl3). The mole ratio of FeCl3 and monomer (3.5: 1), and keeping low temperature during the dropping of diluted catalyst were very important for the polymerization without crosslinking. The PTBT was confirmed by H-1 NMR, FTIR spectra, and elemental analysis. The PTBT has very good solubility in organic solvents such as chloroform, tetrahydrofuran, etc, and good thermal stability with T-g of 164 degrees C. The PTBT shows UV-optical absorption at 406 nm and photoluminescence (PL) spectroscopy at 504 mn in a film. The highest occupied molecular orbital (HOMO) energy of the polymer is -5.71 eV by measuring cyclic voltammetry (CV). A solution-processed polymer thin film transistor device shows a mobility of 3 X 10(-5) - 8 X 10(-5) cm(2) V-1 s(-1), and an on/off current ratio of 10(4). (c) 2007 Wiley Periodicals, Inc.
引用
收藏
页码:5277 / 5284
页数:8
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