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Comparison of electrical characteristics for p-type and n-type organic thin film transistors using copper phthalocyanine

Authors
Kim, KihyunKwak, Tae HoCho, Mi YeonLee, Jin WooJoo, Jinsoo
Issue Date
8월-2008
Publisher
ELSEVIER SCIENCE SA
Keywords
organic thin film transistor; n-type; p-type; copper phthalocyanine; mobility
Citation
SYNTHETIC METALS, v.158, no.13, pp.553 - 555
Indexed
SCIE
SCOPUS
Journal Title
SYNTHETIC METALS
Volume
158
Number
13
Start Page
553
End Page
555
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/122978
DOI
10.1016/j.synthmet.2008.03.028
ISSN
0379-6779
Abstract
The p-type and n-type organic thin film transistors (OTFTs) were fabricated in the same experimental conditions by using hexadecahydro copper phthalocyanine (H16CuPc) and hexadecafluoro copper phthalocynine (F16CuPc) molecules, respectively. The mobilities of H16CuPc and F16CuPc-based OTFT devices in saturation region were measured to be similar to 1.22 x 10(-3) cm(2)/V s and similar to 1.04 x 10(-3) cm(2)/V s, respectively. The temperature dependence of the mobility and activation energy (E-a) for both OTFTs were measured in saturation and linear regions of the drain-source current. We found that the E-a of the F16CuPc-based OTFTs was lower than that of H16CuPc-based ones. The gate voltage (V-g) dependence of the field-effect mobility measured in linear region for the F16CuPc-based OTFTs was more stable, i.e., weaker variation of the field-effect mobility with increasing V-g, than that of the H16CuPc-based ones. The high electron affinity of the hexadecafluorine (F-16) in CuPc contributed to the effective electron accumulation in the active channel. (c) 2008 Elsevier B.V. All rights reserved.
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