材料科学
苯并噻吩
有机半导体
结晶度
薄膜
堆积
薄膜晶体管
半导体
旋涂
有机电子学
晶体管
微晶
化学工程
图层(电子)
光电子学
纳米技术
有机化学
复合材料
化学
噻吩
物理
电压
量子力学
工程类
冶金
作者
Chao He,Yaowu He,Aiyuan Li,Dongwei Zhang,Hong Meng
摘要
Solution processed small molecule polycrystalline thin films often suffer from the problems of inhomogeneity and discontinuity. Here, we describe a strategy to solve these problems through deposition of the active layer from a blended solution of crystalline (2-phenyl[1]benzothieno[3,2-b][1]benzothiophene, Ph-BTBT) and liquid crystalline (2-(4-dodecylphenyl) [1]benzothieno[3,2-b]benzothiophene, C12-Ph-BTBT) small molecule semiconductors with the hot spin-coating method. Organic thin film transistors with average hole mobility approaching 1 cm2/V s, much higher than that of single component devices, have been demonstrated, mainly due to the improved uniformity, continuity, crystallinity, and stronger intermolecular π-π stacking in blend thin films. Our results indicate that the crystalline/liquid crystalline semiconductor blend method is an effective way to enhance the performance of organic transistors.
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