Molecular stacking structure and field-effect transistor characteristics of crystalline poly-(3-hexylthiophene)-block-syndiotactic polypropylene through solvent selectivity

被引：7
|
作者：
Lo, Chen-Tsyr [1 ]
Lin, Chih-Jung [1 ]
Lee, Jing-Yu [2 ]
Tung, Shih-Huang [3 ]
Tsai, Jing-Cherng [2 ]
Chen, Wen-Chang [1 ]
机构：
[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
[2] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 62142, Taiwan
[3] Natl Taiwan Univ, Inst Polymer Sci & Engn, Taipei 10617, Taiwan
来源：
RSC ADVANCES | 2014年 / 4卷 / 44期
关键词：
COIL BLOCK-COPOLYMERS; DIBLOCK COPOLYMERS; CHARGE-TRANSPORT; REGIOREGULAR POLY(3-HEXYLTHIOPHENE); THIN-FILMS; SYNDIOTACTIC POLYPROPYLENE; EPITAXIAL CRYSTALLIZATION; CONJUGATED POLYMERS; EFFECT MOBILITIES; HIGH-EFFICIENCY;
D O I：
10.1039/c4ra03571b
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We investigate the molecular packing structures, morphologies and field-effect characteristics of the crystalline-crystalline poly(3-hexylthiophene)-block-syndiotactic polypropylene block copolymers (P3HT-b-sPP) using different solvent mixtures of chloroform-cyclohexane (CF-CH). For the P3HT-b-sPP with a shorter sPP segment length, the increase of CH solvent content led to the P3HT domain with highly crystalline nanofibrillar networks and thus improved the charge transporting characteristics. For the P3HT-b-sPPs with a longer sPP segment length, well-defined microstructure and device characteristics were only observed at the 70 vol% CF content. Furthermore, the self-encapsulation of the insulating sPP blocks effectively improved the air stability of the P3HT-b-sPP field transistor devices. This work highlights the significance of solvent selectivity and rod/coil block ratios on the molecular packing and the organic field-effect transistor performances.
引用
收藏
页码：23002 / 23009
页数：8
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