An Electrical Characteristics on the Pentacene-Based Organic Thin-Film Transistors using PVA Alignment Layer

PVA 배열층을 이용한 펜타신 유기 박막 트랜지스터의 전기적 특성

  • 전현성 (건국대학교 전자공학부) ;
  • 오환술 (건국대학교 전자공학부)
  • Published : 2010.03.01


The pentacene-based organic thin film transistors(OTFTs) using polyvinylalcohol(PVA) alignment layer were fabricated on the $SiO_2$ evaporated to n-type (111) Si substrates. The pentacene film was deposited by thermally evaporated at $10^{-7}$ torr. X-ray diffraction (XRD) and atomic force microscope(AFM) measurement showed pentacene film which deposited on rubbed PVA layers were partially crystallized at (001) plane. The pentacene OTFTs with PVA layers rubbed perpendicular to the direction of current flow was shown to align better orientation than parallel rubbed case and thus to enhance the mobility and saturation current by a factor of 2.3 respectively. We obtained mobility by 0.026 $cm^2$/Vs and on-off current ratio by ${\sim}10^8$.


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