Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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ZnO Nanowires and P3HT Polymer Composite TFT Device

ZnO 나노선과 P3HT 폴리머를 이용한 유/무기 복합체 TFT 소자

  • Moon, Kyeong-Ju (Information and Electronic Materials Research Laboratory, Department of Materials Science and Engineering, Yonsei University) ;
  • Choi, Ji-Hyuk (Information and Electronic Materials Research Laboratory, Department of Materials Science and Engineering, Yonsei University) ;
  • Kar, Jyoti Prakash (Information and Electronic Materials Research Laboratory, Department of Materials Science and Engineering, Yonsei University) ;
  • Myoung, Jae-Min (Information and Electronic Materials Research Laboratory, Department of Materials Science and Engineering, Yonsei University)
  • 문경주 (연세대학교 신소재공학부) ;
  • 최지혁 (연세대학교 신소재공학부) ;
  • ;
  • 명재민 (연세대학교 신소재공학부)
  • Published : 2009.01.31
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Abstract

Inorganic-organic composite thin-film-transistors (TFTs) of ZnO nanowire/Poly(3-hexylthiophene) (P3HT) were investigated by changing the nanowire densities inside the composites. Crystalline ZnO nanowires were synthesized via an aqueous solution method at a low temperature, and the nanowire densities inside the composites were controlled by changing the ultrasonifiaction time. The channel layers were prepared with composites by spin-coating at 2000 rpm, which was followed by annealing in a vacuum at $100^{\circ}C$ for 10 hours. Au/inorganic-organic composite layer/$SiO_2$ structures were fabricated and the mobility, $I_{on}/I_{off}$ ratio, and threshold voltage were then measured to analyze the electrical characteristics of the channel layer. Compared with a P3HT TFT, the electrical properties of TFT were found to be improved after increasing the nanowire density inside the composites. The mobility of the P3HT TFT was approximately $10^{-4}cm^2/V{\cdot}s$. However, the mobility of the ZnO nanowire/P3HT composite TFT was increased by two orders compared to that of the P3HT TFT. In terms of the $I_{on}/I_{off}$ ratio, the composite device showed a two-fold increase compared to that of the P3HT TFT.

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References

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