Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Energetic Disorder Dependence of Optimal Trap Depth in the Space Charge Field Formation for Photorefractivity

  • Lee, Choong-Keun (Department of Chemistry, Hanyang University) ;
  • Park, Sun-Kyung (Institute of Sciences and Technology, College of Science and Technology, Korea University) ;
  • Yang, Min-O (Department of Chemistry, Chungbuk National University) ;
  • Lee, Nam-Soo (Department of Chemistry, Chungbuk National University) ;
  • Kim, Nak-Joong (Department of Chemistry, Hanyang University)
  • Published : 2007.03.20
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Abstract

Trap effects on the formation of space-charge field (SCF) associated with the photorefractivity of nonlinear optical polymers were studied by the Monte Carlo simulation using modified Gaussian disorder model. The charge transport dynamics influenced by the presence of trap molecules controls the formation of SCF via the charge distribution. Temporal behavior of SCF formation and SCF dependence on the trap depth are discussed in terms of the concentration and distribution of charges (holes and ionized acceptors) developed following illumination of light. The correlation of the trap depth and the energetic disorder is presented for an optimal efficiency for the SCF formation.

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