کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1268442 | 972405 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Controllable carrier density of pentacene field-effect transistors using polyacrylates as gate dielectrics Controllable carrier density of pentacene field-effect transistors using polyacrylates as gate dielectrics](/preview/png/1268442.png)
We have studied the effect of the chemical structure of dielectrics by evaporating pentacene onto a series of polyacrylates: poly(methylmethacrylate), poly(4-methoxyphenylacrylate), poly(phenylacrylate), and poly(2,2,2-trifluoroethyl methacrylate) in organic thin-film transistors (OTFTs). In top-contact OTFTs, the polyacrylates had a significant effect on field-effect mobilities ranging 0.093 ∼ 0.195 cm2 V−1 s−1. This variation neither correlated with the polymer surface morphology nor the observed pentacene crystallite size. This result implies that the PTFMA device generates the local electric field that accumulates holes and significantly shifts the threshold voltage and the turn-on voltage to −8.62 V and 3.5 V, respectively, in comparison with those of PMMA devices.
Journal: Organic Electronics - Volume 9, Issue 6, December 2008, Pages 1069–1075