Enhanced electrical and photosensing properties of pentacene organic thin-film phototransistors by modifying the gate dielectric thickness

Jae Hong Kwon, Myung Ho Chung, Tae Yeon Oh, Byeong Kwon Ju, F. Yakuphanoglu

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The effects of dielectric layer thickness on the electrical performance and photosensing properties of organic pentacene thin-film transistors have been investigated. To improve the electrical performance of pentacene thin-film transistors (TFTs), the poly-4-vinylphenol (PVP) polymer with various thicknesses was used in fabrication of the pentacene transistors. The pentacene thin-film transistor with the PVP dielectric layer of 70 nm exhibited a field-effect mobility of 4.46 cm 2/Vs in the saturation region, a threshold voltage of -4.0 V, a gate voltage swing of 2.1 V/decade and an on/off current ratio of 5.1 × 10 4. In the OFF-state, the photoresponse of the transistors increases linearly with illumination intensity. The pentacene transistor with the thinner dielectric layer thickness indicates the best photosensing behavior. It is evaluated that the electrical performance and photosensing properties of pentacene thin-film transistors can be improved by using various thickness dielectric layer.

Original languageEnglish
Pages (from-to)2306-2311
Number of pages6
JournalMicroelectronic Engineering
Volume87
Issue number11
DOIs
Publication statusPublished - 2010 Nov 1

Fingerprint

Phototransistors
phototransistors
Gate dielectrics
Thin film transistors
transistors
electrical properties
Thin films
Transistors
thin films
Threshold voltage
Lighting
Fabrication
aluminum tetrasulfophthalocyanine
pentacene
Polymers
threshold voltage
Electric potential
illumination
saturation
fabrication

Keywords

  • Pentacene
  • Photosensing
  • Thin-film transistor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Enhanced electrical and photosensing properties of pentacene organic thin-film phototransistors by modifying the gate dielectric thickness. / Kwon, Jae Hong; Chung, Myung Ho; Oh, Tae Yeon; Ju, Byeong Kwon; Yakuphanoglu, F.

In: Microelectronic Engineering, Vol. 87, No. 11, 01.11.2010, p. 2306-2311.

Research output: Contribution to journalArticle

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AU - Yakuphanoglu, F.

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