Chemically bound sensitizers: Dye sensitization of poly(N-vinylcarbazole) via sulfonation and ion exchange
✍ Scribed by Pochan, John M. ;Gibson, Harry W.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1982
- Tongue
- English
- Weight
- 409 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0098-1273
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✦ Synopsis
Abstract
Photogeneration in a series of surface‐sulfonated and dye‐exchanged poly(N‐vinylcarbazole) films has been studied as a function of depth of the resultant sensitizing (photogeneration) layer. It has been shown that increasing the depth of this layer greatly affects the observed photogeneration rate, decreasing the efficiency with increasing sulfonation. Formed generator depths were from 50 to 250 Å. These results have been attributed to changes in the product μ~g~τ~g~, where τ~g~ is the carrier lifetime in the generation layer and μ~g~ the carrier mobility in the generation layer. Collection efficiency in the monomer dye absorption maximum and the “mer” absorption maxima are comparable.