An investigation of transient effects in poly(3-hexylthiophenes) based thin film transistors caused by oxygen and water molecules

Chia Hao Chang*, Meng Fei Chen, Chao-Hsin Chien

*Corresponding author for this work

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

In this article, we investigate hysteresis behavior observed in the current-voltage transfer curve of regioregular poly(3-hexylthiophene)(P3HT) based thin film transistors (PTFTs) using bi-directional voltage sweeping. According to the results of our experiments, the hysteresis effects were closely related to oxygen (O2) and water (H2O) molecules residing in the P3HT active layer. As a result, we hypothesized that O2 and H2O in the P3HT could form two kinds of dopants, i.e., stable and transient states. Stable state dopants, which are commonly thought to be of the acceptor-type dopants, could induce holes in the channel region contributing to better on-current. On the contrary, transient state dopants were found to be unable to induce holes, however could enable the formation of polarization agents and create hysteresis. These two types of dopants seem have a common origin, thus they could be converted into each other through the combination of specific processes and applied external bias. From the viewpoint of device operation stability, except on-current level and characteristics including threshold voltage, off-current magnitude and onoff ratio, the impact of hysteresis should garner the attention of those pursuing high performance PTFTs.

原文English
期刊Journal of the Electrochemical Society
158
發行號9
DOIs
出版狀態Published - 3 八月 2011

指紋 深入研究「An investigation of transient effects in poly(3-hexylthiophenes) based thin film transistors caused by oxygen and water molecules」主題。共同形成了獨特的指紋。

引用此