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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 1
BKCSDE 30(1)
January 20, 2009 

New Calculation of Charge Generation Efficiency and Photocurrent in Organic Photoconducting Device
Choongkeun Lee, Jin Woo Oh, Chil Sung Choi, Nam Soo Lee*, Nakjoong Kim*
Monte Carlo simulation, Photo charge generation, Photocurrent, Multiple site interaction
A new approach was applied to examine the charge generation and transport in organic photoconductive devices by Monte?Carlo simulation utilizing multiple site interactions of carriers with all other charges within Coulomb radius. Stepwise generation frame was considered first by a charge separation process that was counted in two separate transactions, i.e., hopping against physical decay and dissociation against recombination. Thereafter, diffusion/ drifting process of free carriers was counted to follow. This method enables to examine readily the photocurrent generated alongside the charge generation efficiency. The field and temperature dependences of the efficiency and photocurrent were obtained comparable to Onsager’s and experimental data.
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