Critical role of side-chain attachment density on the order and device performance of polythiophenes

被引:311
作者
Kline, R. Joseph
DeLongchamp, Dean M. [1 ]
Fischer, Daniel A.
Lin, Eric K.
Richter, Lee J.
Chabinyc, Michael L.
Toney, Michael F.
Heeney, Martin
McCulloch, Iain
机构
[1] NIST, Gaithersburg, MD 20899 USA
[2] Palo Alto Res Ctr, Palo Alto, CA 94304 USA
[3] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA
[4] Merck Chem, Southampton S016 7QD, Hants, England
[5] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
关键词
D O I
10.1021/ma0709001
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
High performance, solution processable semiconductors are critical to the realization of low cost, large area electronics. We show that a signature molecular packing motif-side-chain interdigitation-correlates to high performance for a large and important class of organic semiconductors. The side chains of recently developed high performance copolymers of poly(alkylthiophenes) can and do interdigitate substantially, whereas they do not in the most common form of the extensively studied, lower performance poly(alkythiophenes). Side-chain interdigitation provides a mechanism for three-dimensional ordering; without it, poly(alkylthiophenes) are limited to small domains and poor performance. We propose the synthetic design rule that three-dimensional ordering is promoted by side-chain attachment densities sufficiently low to permit interdigitation.
引用
收藏
页码:7960 / 7965
页数:6
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