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Electrical bistability and negative differential resistance in diodes based on silver nanoparticle-poly(N-vinylcarbazole) composites

  • aiwei), aw tang (tang
  • shengchun), (qu
  • yanbing), yb hou (hou
  • feng), f teng (teng
  • hairen), tan (tan
  • jie), j liu (liu
  • xingwang), xw zhang (zhang
  • yongsheng), ys wang (wang
  • zhanguo), zg wang (wang
Publication Date
Jan 01, 2010
Knowledge Repository of SEMI,CAS
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An electrically bistable device has been fabricated using nanocomposite films consisting of silver nanoparticles and a semiconducting polymer by a simple spin-coating method. The current-voltage characteristics of the as-fabricated devices exhibit an obvious electrical bistability and negative differential resistance effect. The current ratio between the high-conducting state and low-conducting state can reach more than 103 at room temperature. The electrical bistability of the device is attributed to the electric-filed-induced charge transfer between the silver nanoparticles and the polymer, and the negative differential resistance behavior is related to the charge trapping in the silver nanoparticles. The results open up a simple approach to fabricate high quality electrically bistable devices by doping metal nanoparticles into polymer.

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