Moisture induced surface polarization in a poly(4-vinyl phenol) dielectric in an organic thin-film transistor

被引:131
作者
Jung, T
Dodabalapur, A [1 ]
Wenz, R
Mohapatra, S
机构
[1] Univ Texas, Microelect Res Ctr, Austin, TX 78758 USA
[2] OrganicID, Colorado Springs, CO 80906 USA
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.2117629
中图分类号
O59 [应用物理学];
学科分类号
摘要
Surface polarization in a poly(4-vinyl phenol) (PVP) dielectric induced by water molecules has been qualitatively investigated in pentacene thin-film transistors. The magnitudes of drain currents from devices with PVP dielectrics subject to specific surface treatments increased with humidity, whereas the opposite responses were observed from device with SiO2 dielectrics. The increase in drain current is attributed to the accumulation of extra charge carriers induced by the surface polarization in addition to that by the vertical electric field. Such polarization effects should be carefully considered in characterizing organic and polymer thin-film transistors, particularly those with polymeric gate insulators. (C) 2005 American Institute of Physics.
引用
收藏
页码:1 / 3
页数:3
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