Electroluminescence from a pentacene based ambipolar organic field-effect transistor

被引:26
|
作者
Schidleja, Martin [1 ]
Melzer, Christian [1 ]
von Seggern, Heinz [1 ]
机构
[1] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany
关键词
bipolar transistors; electroluminescent devices; electron traps; ohmic contacts; organic field effect transistors; organic semiconductors; FILMS;
D O I
10.1063/1.3107268
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this letter light emission from a pentacene-based ambipolar organic field-effect transistor is reported. Electroluminescence appears from a narrow region extending over the entire transistor channel width. The position of the light-emitting recombination zone is spatially controllable by the applied voltages. The current/voltage characteristics of the ambipolar device exhibit a hysteresis caused by trapped electrons in the transistor channel, which is also mirrored in the voltage dependent position of the light-emitting region. From the voltage dependence of the light intensity it can be concluded that Ohmic contacts are formed between pentacene and the utilized metal contacts calcium and gold.
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页数:3
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