Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2856
Title: Analysis of interface states of the pentacene organic thin-film phototransistor by conductance technique
Authors: Okur, Salih
Yakuphanoğlu, Fahrettin
Okur, Salih
Keywords: Interface state density
Organic semiconductor
Thin-film transistor
Transistors
Issue Date: Feb-2009
Publisher: Elsevier Ltd.
Source: Okur, S. and Yakuphanoğlu, F. (2009). Analysis of interface states of the pentacene organic thin-film phototransistor by conductance technique. Sensors and Actuators, A: Physical, 146(2), 241-245. doi:10.1016/j.sna.2008.11.023
Abstract: A pentacene thin-film transistor with a channel width of 300 μm and a channel length of 30 μm has been successfully fabricated on n-Si substrate with thermally oxidized SiO2 as a gate insulator. The photovoltaic and interface state density properties of the transistor have been investigated. A pentacene film of 200 nm thickness was deposited on the SiO2 layer with a vacuum thermal evaporator. Atomic force microscopy images of the pentacene film on SiO2 insulating layer show a homogeneous film surface with the rms roughness of 11 nm. The transistor shows p-channel characteristics, as a result of positive carriers generated in the pentacene film for the negative bias voltages applied to the gate. The photosensitivity (Iph/Idark) is measured as 1.45 at an illumination intensity of 3500 lux at the off state. This suggests that the pentacene thin-film transistor shows a phototransistor characteristic. The field-effect mobility of the pentacene OTFT was found to be 0.021 cm2/(V s). The interface state density of the transistor was determined using conductance technique and was found to be about 1.191 × 1010 eV-1 cm-2.
URI: http://dx.doi.org/10.1016/j.sna.2008.11.023
http://hdl.handle.net/11147/2856
ISSN: 0924-4247
0924-4247
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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