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Photoconductivity in molecularly doped poly(methylmethacrylate) sandwich cells
Author(s) -
V. C. Kishore,
R. Dhanya,
C. Sudha Kartha,
K. Sreekumar,
Rani Joseph
Publication year - 2007
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.2710773
Subject(s) - photoconductivity , photocurrent , materials science , doping , optoelectronics , dissociation (chemistry) , analytical chemistry (journal) , chemistry , organic chemistry
Poly(methyl)methacrylate was made photoconducting by molecular doping and the photoconductivity was investigated using modulated photocurrent technique. Low-temperature current-voltage measurements showed that the transport mechanism was thermally activated hopping. An experimental investigation of the photoconductivity action spectrum along with theoretical calculation enabled an estimation of the diffusion coefficient of the material. The presence of states with a distribution of lifetimes could be understood from the frequency response of the photocurrent. The photocurrent was due to the field-assisted dissociation of these states.

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