Liquid-crystalline semiconducting polymers with high charge-carrier mobility
Liquid-crystalline semiconducting polymers with high charge-carrier mobility
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DOI：
10.1038/nmat1612
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发表时间：
2006-04-01
期刊：
影响因子：
41.2
通讯作者：
Toney, MF
中科院分区：
文献类型：
--
作者：
Mcculloch, I;Heeney, M;Toney, MF
可以通过简单处理技术制造并具有出色的电性能来制造的有机半导体是有机电子进步的关键要求。需要通过理解和控制半导体微观结构和控制半导体对环境电化学氧化过程的稳定性进行优化的高半导体电荷迁移率。我们报告了新的半导体液晶硫诺[3,2-b]噻吩聚合物，通过高度有组织的形态在中间相中加工而实现的电荷 - 载流子迁移率的增强，以及暴露于环境和低湿气空气的影响关于晶体管设备的性能。在薄膜中显示出相对较大的晶体域大小，其长度尺寸（类似于200 nm），因此提供了制造单晶聚合物晶体管的潜力。在低湿度空气环境中静态存储和操作下的良好晶体管稳定性已证明，在氮气下，电荷载体现场效应迁移率为0.2-0.6 cm（2）V-1 S（-1）。
Organic semiconductors that can be fabricated by simple processing techniques and possess excellent electrical performance, are key requirements in the progress of organic electronics. Both high semiconductor charge-carrier mobility, optimized through understanding and control of the semiconductor microstructure, and stability of the semiconductor to ambient electrochemical oxidative processes are required. We report on new semiconducting liquid-crystalline thieno[3,2-b] thiophene polymers, the enhancement in charge-carrier mobility achieved through highly organized morphology from processing in the mesophase, and the effects of exposure to both ambient and low-humidity air on the performance of transistor devices. Relatively large crystalline domain sizes on the length scale of lithographically accessible channel lengths (similar to 200 nm) were exhibited in thin films, thus offering the potential for fabrication of single-crystal polymer transistors. Good transistor stability under static storage and operation in a low-humidity air environment was demonstrated, with charge-carrier field-effect mobilities of 0.2-0.6 cm(2) V-1 s(-1) achieved under nitrogen.