Eur. Phys. J. Appl. Phys.
Volume 70, Number 2, May 2015
|Number of page(s)||6|
|Section||Semiconductors and Devices|
|Published online||19 May 2015|
Improve the n-type performance in organic heterojunction transistors by controlling thickness of copper phthalocyanine
Department of Electronic Engineering, College of Communication and Electronics, Chongqing University, Chongqing
400044, P.R. China
2 State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, P.R. China
a e-mail: email@example.com
Revised: 9 April 2015
Accepted: 13 April 2015
Published online: 19 May 2015
N-type C60 thin film transistors with heterojunction were fabricated by introducing copper phthalocyanine (CuPc) modifying layer between polymer dielectrics and C60 semiconductor. Comparing with conventional organic thin film transistors (OTFTs) based on single C60 layer, such devices can not only boost the electron mobility up to 3 times, but also well control threshold voltage VT and off current Ioff by optimizing CuPc thickness. The performance improvement can be attributed to the increase of free electron carriers by the dipole effect at the C60/CuPc interface, and better C60 film quality grown upon CuPc.
© EDP Sciences, 2015
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