Low Band Gap Thiophene-Perylene Diimide Systems with Tunable Charge Transport Properties

被引：44

作者：

Balaji, Ganapathy ^{[1
,2
]}

Kale, Tejaswini S. ^{[1
]}

Keerthi, Ashok ^{[2
]}

Della Pelle, Andrea M. ^{[1
]}

Thayumanavan, S. ^{[1
]}

Valiyaveettil, Suresh ^{[2
]}

机构：

[1] Univ Massachusetts, Dept Chem, Amherst, MA 01003 USA

[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

来源：

ORGANIC LETTERS | 2011年 / 13卷 / 01期

关键词：

FIELD-EFFECT TRANSISTORS; OLIGOTHIOPHENES; ABSORPTION;

D O I：

10.1021/ol1023486

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Perylenediimide-pentathiophene systems with varied architecture of thiophene units were synthesized. The photophysical, electrochemical, and charge transport behavior of the synthesized compounds were studied. Both molecules showed a low band gap of similar to 1.4 eV. Surprisingly, the molecule with pentathiophene attached via beta-position to the PDI unit upon annealing showed a predominant hole mobility of 1 x 10(-4) cm(2) V-1 s(-1) whereas the compound with branched pentathiophene attached via beta-position showed an electron mobility of 9.8 x 10(-7) cm(2) V-1 s(-1). This suggests that charge transport properties can be tuned by simply varying the architecture of pentathiophene units.

引用

页码：18 / 21

页数：4

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