The study of the photo-response characteristics of organic photosensors integrated with pentacene based thin film transistors

Shin Woo Jeong, Jin Wook Jeong, Seongpil Chang, Tae Yeon Oh, Seung Youl Kang, Kyoung Ik Cho, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We have investigated the photo-response characteristics of organic photosensors (OPS) integrated with pentacene based thin film transistors (TFTs). The fabricated device configuration is PEN/ITO/PEDOT:PSS/(poly(3- hexylethiophene)/phenyl-C61-butryic acid methyl ester) (P3HT/PCBM)/Al and PDMS/Au/(poly-4-vinyphenol) (PVP)/pentacene/Au. In order to study the effect of the applied voltage to the pentacene-TFT on the OPS, each device is connected in series. The response current is tuned dependant on the gate-source voltage and the anode-source voltage. The change of the photo induced ON current in the integrated device is measured under light illuminations ranging from 50 mW/cm2 to 500 mW/cm2; the corresponding photo-response (ΔI/I0) of the devices varied from 0.16 to 1.9. We found that the photo-response characteristic is high at the low anode-source voltage and high gate-source voltage.

Original languageEnglish
Pages (from-to)657-661
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume156
Issue number2
DOIs
Publication statusPublished - 2011 Aug

Keywords

  • Flexible electronics
  • Organic photo sensor
  • Organic thin film transistor
  • P3HT/PCBM
  • Photo-response

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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