Microphase separation-promoted crystallization in all-conjugated poly(3-alkylthiophene) diblock copolymers with high crystallinity and carrier mobility

被引：31

作者：

Ge, Jing ^{[1
]}

He, Ming ^{[1
]}

Yang, Xiubao ^{[1
]}

Ye, Zhi ^{[1
]}

Liu, Xiaofeng ^{[2
]}

Qiu, Feng ^{[1
]}

机构：

[1] Fudan Univ, State Key Lab Mol Engn Polymers, Dept Macromol Sci, Shanghai 200433, Peoples R China

[2] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 36期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

HETEROJUNCTION SOLAR-CELLS; FIELD-EFFECT MOBILITY; REGIOREGULAR POLY(3-HEXYL THIOPHENE); COIL BLOCK-COPOLYMERS; THIN-FILM TRANSISTORS; MOLECULAR-WEIGHT; ROD-COIL; CHARGE-TRANSPORT; PERFORMANCE; POLYMERS;

D O I：

10.1039/c2jm33204c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The crystallinity of all-conjugated diblock copolymer, poly(3-butylthiophene)-b-poly(3-dodecylthiophene) (P3BDDT), with varied block ratios was significantly enhanced by a "two-step" thermal annealing treatment. The resulting P3BDDT exhibited an attractively high crystallinity of similar to 35%, which is a 3-fold enhancement over those of its homopolymer counterparts. The space-charge limited current (SCLC) mobility measurement revealed that the carrier mobility of the highly crystalline P3BDDT film was increased to as high as similar to 8.4 x 10(-3) cm(2) V-1 s(-1), exceeding the highest SCLC mobility of poly(3-alkylthiophene) homopolymer films reported in previous work (i.e., similar to 1.6 x 10(-3) cm(2) V-1 s(-1)). DSC, XRD, AFM and SAXS characterizations demonstrated that the interplay of crystallization and microphase separation during the "two-step" thermal annealing treatment plays a key role in the improvement of P3BDDT crystallinity.

引用

页码：19213 / 19221

页数：9

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