基于聚噻吩/聚己内酯共混物的有机薄膜晶体管

王晓鸿; 邱龙臻

doi:doi:10.3788/fgxb20123308.0857

发光学报, 2012, 33 (8): 857, 网络出版: 2012-08-15

基于聚噻吩/聚己内酯共混物的有机薄膜晶体管

Organic Thin Film Transistors Based on Blends of Poly(3-hexylthiophene) and Polycaprolactone

论文大纲

王晓鸿 ^*邱龙臻

作者单位

特种显示技术教育部重点实验室, 特种显示技术国家工程实验室, 现代显示技术省部共建国家重点实验室培育基地, 合肥工业大学光电技术研究院, 安徽合肥 230009

有机薄膜晶体管半导体/绝缘聚合物相分离电性能 organic thin-film transistors (OTFTs) semiconducting/insulating blend phase separation electric performance

摘要

选择聚3-己基噻吩(P3HT)/聚己内酯(PCL)双晶共混体系制备了不同配比的共混物有机薄膜晶体管。电学性能研究发现, 随着共混物中P3HT含量降低, 薄膜晶体管的场效应迁移率、开关电流比和阈值电压等性能缓慢降低。当P3HT质量分数为40%时, 共混物薄膜仍具有较好的场效应性能, 迁移率为0.008 cm2·V-1·s-1, 开关电流比为5×103,阈值电压为45.5 V。原子力显微镜测试结果表明: 共混物成膜时发生明显的垂直相分离, 在界面处形成连续的半导体层, 有利于载流子传输。

Abstract

A blending crystalline system containing poly(3-hexylthiophene) and polycaprolactone was investigated. The electric measurements reveal that the field-effect performances of blend films, such as mobility, on/off current ratio and threshold voltage, decrease slowly with P3HT content reducing. However, the devices still have relatively good performance even P3HT content was 40%. According to the AFM studies, vertical phase separation occurs in the blend films, and a connective semiconducting layer can be observed in the interface between insulating layer and active layer, which is beneficial to transport of charge carriers.

参考文献

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王晓鸿, 邱龙臻. 基于聚噻吩/聚己内酯共混物的有机薄膜晶体管[J]. 发光学报, 2012, 33(8): 857. WANG Xiao-hong, QIU Long-zhen. Organic Thin Film Transistors Based on Blends of Poly(3-hexylthiophene) and Polycaprolactone[J]. Chinese Journal of Luminescence, 2012, 33(8): 857.

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