Novel polymer semiconductor films and related field effect transistor devices

doi:10.3969/j.issn.1000-5641.201922006

Abstract

Abstract: Thin films using a novel organic polymer semiconductor (DPPTTT(poly(3,6-di(2-thien-5-yl)-2,5-di(2-octyldodecyl)-pyrrolo[3,4-c]pyrrole-1,4-dione) thieno [3,2-b] thiophene)) were prepared by a solution process and characterized through different techniques. It was found that the thickness, surface roughness, and Raman peak strength of the semiconductor films changed with the solution concentration and rotation rate. The polymer semiconductor was used to prepare the active layer for p-type organic field effect transistors; with these, the influence of channel length on critical transistor parameters (i.e., carrier mobility and threshold voltage) was studied. It was found that the effective carrier mobility was the highest at 0.12 cm²/Vs when the channel length was reduced to 50 μm. With a decrease in channel length, both carrier mobility and threshold voltage tended to increase, which was contrary to the short channel effect. This paper may provide new perspectives for better understanding the physics of field effect transistor devices.

Key words: organic field effect transistor, polymer semiconductor, solution process, short channel effect, contact resistance

CLC Number:

O472+.4

YE Jianchun, ZHOU Lizhao, LI Wenwu, OU-YANG Wei. Novel polymer semiconductor films and related field effect transistor devices[J]. Journal of East China Normal University(Natural Science), 2020, 2020(1): 83-92.

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