Space-charge dynamics in photorefractive polymers
作者： Oksana Ostroverkhova , Kenneth D. Singer
DOI: 10.1063/1.1491279
关键词: Chemical physics 、 Ionization energy 、 Materials science 、 Photoconductivity 、 Optoelectronics 、 Charge carrier 、 Acceptor 、 Chromophore 、 Photorefractive effect 、 Ionization 、 Space charge
摘要: The model of space-charge formation in photorefractive polymers due to Schildkraut and Buettner has been modified include thermally accessible deep traps as well shallow traps. dynamic equations have solved semiempirically using independent measurements photoconductive properties predict dynamics. Dependencies the dynamics on charge generation, mobility, trap density, acceptor ionized their associated rates are examined. magnitude fast time constant development is successfully predicted. introduction into allowed us qualitatively reduction speed filling growth. Experimental studies photoconductivity photorefraction (PR) several polyvinyl carbazole composites carried out demonstrate applicability model. By choosing chromophores with different ionization potentials by varying chromophore concentrations, we investigate influence potential photoelectric PR reveal nature contribution both Effects plasticizer components also discussed.
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