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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 28, Number 3
BKCSDE 28(3)
March 20, 2007 

 
Title
Energetic Disorder Dependence of Optimal Trap Depth in the Space Charge Field Formation for Photorefractivity
Author
Choongkeun Lee, Sun-Kyung Park, Mino Yang*, Nam-Soo Lee*, Nakjoong Kim*
Keywords
Photorefractivity, Charge transport dynamics, Space-charge field, Disorder and trap depth, Monte Carlo simulation
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.
Page
447 - 450
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