期刊
IEEE ELECTRON DEVICE LETTERS
卷 34, 期 8, 页码 1014-1016出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2013.2264140
关键词
Cytop; fluoropolymer; low voltage; organic thin-film transistor (OTFT); threshold voltage shift
资金
- National Research Foundation of Korea
- Korea government (MSIP)
- Center for Advanced Soft Electronics under the Global Frontier Research Program of the Ministry of Education, Science and Technology, Korea [2011-0031638]
- Graphene Research Center Program of KI for the Nanocentry, Korea Advanced Institute of Science and Technology
- Ministry of Science, ICT & Future Planning, Republic of Korea [KINC01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2011-0031638] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We demonstrate an effective, noble metal-free method to control the threshold voltages (V-T) of organic thin-film transistors (OTFTs). Through covering an Al gate electrode with a high work function (WF) transition metal oxide (TMO) layer of WO3 or MoO3, V-T is shifted in a positive direction from -2.15 V to -1.40 V or -0.89 V, respectively, with respect to that of OTFTs with a bare Al gate electrode. Together with a thin dielectric layer of cross-linked Cytop, the reduced magnitude of V-T allows for a low-voltage switching operation with a gate voltage as small as 2 V. The amount of V-T shift is shown to correlate well with the change in the WF of the gate electrode upon TMO deposition.
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