Abstract
We have synthesized nine anisotropic chromophores, with different degrees of fluorination, and studied the effect of the chromophore's ionization potential on charge-transfer complexation, photoconductivity, and response time in photorefractive polymer mixtures based on poly(vinylcarbazole). (2,4,7-Trinitrofluoren-9-ylidene)malononitrile (TNFDM) or C60 provided the sensitization. We have found evidence of strong complexation between TNFDM and the chromophore. At high electric fields, the photoconductivity decays during illumination and reaches a limiting value that correlates with the chromophore's ionization potential. A buildup of C60- radical anions is observed simultaneously. The strong decline in photoconductivity correlates with an increase in the photorefractive grating buildup time.
Original language | English (US) |
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Pages (from-to) | 2251-2258 |
Number of pages | 8 |
Journal | Journal of Materials Chemistry |
Volume | 9 |
Issue number | 9 |
DOIs | |
State | Published - 1999 |
ASJC Scopus subject areas
- General Chemistry
- Materials Chemistry