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

    Bibliographical note

    Funding Information:
    This work was supported by the IT R&D Program (Grant No. 2008-F-024-02, Development of Mobile Flexible (Input/Output Platform) of MKE in Korea, Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (No. 2009-0083126) and the Industrial-Educational Cooperation Program between Korea University and Samsung Electronics.

    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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