Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
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Electrical Characteristics of Organic Thin-film Transistors with Polyvinylpyrrolidone as a Gate Insulator

  • Choi, Jong-Sun (Department of Electrical, Information & Control Engineering, Hongik University)
  • Published : 2008.12.30
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Abstract

This paper reports the electrical characteristics of polyvinylpyrrolidone (PVPy) and the performance of organic thin-film transistors (OTFTs) with PVPy as a gate insulator. PVPy shows a dielectric constant of about 3 and contributes to the upright growth of pentacene molecules with $15.3\AA$ interplanar spacing. OTFT with PVPy exhibited a field-effect mobility of 0.23 $cm^2$/Vs in the saturation regime and a threshold voltage of -12.7 V. It is notable that there was hardly any threshold voltage shift in the gate voltage sweep direction. Based on this reliable evidence, PVPy is proposed as a new gate insulator for reliable and high-performance OTFTs.

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