In this study, we investigated pentacene-based ambipolar organic transistors using a linear polyethylenimine (LPEI) as gate dielectric buffer layer. We found that introducing an insulating LPEI layer between the pentacene active channel and the polymethylmetacrylate gate dielectric layer could enhance the n-channel electrical characteristics, such as early-on threshold voltage (Vth), sharp subthreshold swing (SS), and enlarged on/off current ratio, despite the surface of the LPEI layer disfavoring the growth of the high-quality pentacene active layer. These results were supported by frequency-dependent conductivity measurements, that is, the decreased interfacial trap density and mean interface trap time constant of the devices with the LPEI layer. In summary, the LPEI layer could improve the n-channel characteristics of pentacene-based ambipolar organic transistors to make them suitable for a vast range of potential applications.
|Title of host publication
|AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices
|Subtitle of host publication
|TFT Technologies and FPD Materials, Proceedings
|Institute of Electrical and Electronics Engineers Inc.
|Number of pages
|Published - 2017 Aug 8
|24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017 - Kyoto, Japan
Duration: 2017 Jul 4 → 2017 Jul 7
|AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings
|24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017
|17-07-04 → 17-07-07
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
- Computational Theory and Mathematics