Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (10): 1073-1075.doi: 10.3866/PKU.WHXB20051002

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Studies on the Transport Behavior in Ag/TCNQ Thin Films

LIU Ping; JIANG Yi-ming; GUO Feng; XIE Heng-bo; LI Jin   

  1. Department of Materials Science, Fudan University, Shanghai 200433
  • Received:2005-01-04 Revised:2005-03-24 Published:2005-10-15
  • Contact: LI Jin E-mail:jinli@fudan.edu.cn

Abstract: Ag/TCNQ bi-layer films with different thicknesses were prepared on glass substrate by successive vacuum deposition of Ag and TCNQ. Ag-TCNQ complex was formed by the solid transport of Ag in the films. The transport behavior of Ag in the thin films was studied using optical transmittance spectra. The transport coefficients(k) were obtained and the activation energy was calculated between 60 and 110 ℃. The results show that the transport distance (x) and transport time (t) accord with parabola law (x2=2kt). The transport coefficient k and the activation energy Q could be expressed by k=k0exp(-Q/RT)=5.62×10-6 exp(-0.53/RT). And the diffusion mechanism was discussed, which was believed to be interstitialcy mechanism.

Key words: Ag/TCNQ thin films, Activation energy, Transport coefficient