Fast photorefractive effect in PVK:C{sub 60} DEANST polymer composite
- State Univ. of New York, Buffalo, NY (United States)
The photorefractive effect is observed and described in a polymeric composite consisting of poly[N-vinylcarbazole] charge transporting matrix, fullerene C{sub 60} photosensitizing molecules, and second-order active molecules of (diethylamino)nitrostyrene. The results of photoconductivity, electrooptic modulation, degenerate four-wave mixing, and two-beam coupling experiments are reported. The composite shows relatively high field-dependent electrooptic coefficient and charge carrier photogeneration quantum efficiency. The observed photorefractive diffraction efficiencies compare well with those of well-known inorganic materials. Time-dependent measurements reveal very fast kinetics of light induced phase grating formation and erasure. A possibility of efficient switching of the photorefractive effect with an external electric field is shown. 25 refs., 10 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 102752
- Journal Information:
- Journal of Physical Chemistry, Vol. 98, Issue 35; Other Information: PBD: 1 Sep 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photorefractivity in liquid crystals doped with a soluble conjugated polymer.
Off-Resonance Photosensitization of a Photorefractive Polymer Composite Using PbS Nanocrystals