Indolo[3,2-b]carbazole-Based Thin-Film Transistors with High Mobility and Stability
详细信息 查看全文
- 作者：Yiliang Wu ; Yuning Li ; Sandra Gardner ; and Beng S. Ong
- 刊名：Journal of the American Chemical Society
- 出版年：2005
- 出版时间：January 19, 2005
- 年：2005
- 卷：127
- 期：2
- 页码：614 - 618
- 全文大小：194K
- 年卷期：v.127,no.2(January 19, 2005)
- ISSN：1520-5126
文摘
Proper functionalization of indolo[3,2-b]carbazole led to a new class of high-performance organicsemiconductors suitable for organic thin-film transistor (OTFT) applications. While 5,11-diaryl-substitutedindolo[3,2-b]carbazoles without long alkyl side chains provided amorphous thin films upon vacuumdeposition, those with sufficiently long alkyl side chains such as 5,11-bis(4-octylphenyl)indolo[3,2-b]carbazoleself-organized readily into highly crystalline layered structures under similar conditions. OTFTs using channelsemiconductors of this nature exhibited excellent field-effect properties, with mobility up to 0.12 cm2 V-1s-1 and current on/off ratio to 107. As this class of organic semiconductors has relatively low HOMO levelsand large band gaps, they also displayed good environmental stability even with prolonged exposure toamber light, an appealing characteristic for OTFT applications.