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。
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.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2012年第8期857-862,共6页
Chinese Journal of Luminescence
基金
973计划前沿专项(2010CB334704
2012CB723406)
国家自然科学基金(21174036
51103034)资助项目
关键词
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
