Dependencies of Transport and Photoluminescence on Morphology of Vacuum Deposited C60 Films.

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  • Kaneto Keiichi
    Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka, 820, Japan
  • Rikitake Koichi
    Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka, 820, Japan
  • Akiyama Takahiro
    Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka, 820, Japan
  • Hasegawa Hideki
    Department of Computer Science and Electronics, Kyushu Institute of Technology, Iizuka, Fukuoka, 820, Japan

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  • Dependencies of Transport and Photolumi
  • Dependencies of Transport and Photoluminescence on Morphology of Vacuum Deposited C<sub>60</sub> Films

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Abstract

Electrical transport, its high field effects and photoluminescence are studied in C60 films deposited at various substrate temperatures. The morphology of films is characterized by X-ray diffraction and atomic force microscope. It is found that the electrical conductivity depends strongly on the morphology and the applied field. High conductivity is obtained for films prepared at high substrate temperatures and high fields. The emission peak shifts to the low energy side for highly crystalline films. The results are discussed in terms of the crystallinity and the delocalization of electrons.

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