Photocurrent Storage in Sodium-Doped Cadmium-Sulfide
Abstract
Thermal conductivity vs. temperature for a sample in the photo-stimulated storage state was found to be virtually unchanged from an unexcited, dark run with the same sample. For the temperature range of 80 - 230 K, storage state Hall mobilities were low (2 - 25 sq cm/V-sec) and showed a definite activation character for all levels of initial photoexcitation. Measured activation energies ranged from 0.019 eV to 0.046 eV. Independent of the density of photoexcited carriers, Hall mobilities at the conductivity maxima for all runs were observed to be the same and equal to 17 sq cm/V-sec. For current parallel to the C-symmetry axis of the crystal, no significant change in conductivity activation energies was observed. However, for thermally stimulated current runs with stress applied a sharp discontinuous drop in stored conductivity was observed at 215 K and at 222 K.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1974
- Bibcode:
- 1974PhDT........25H
- Keywords:
-
- Physics: Condensed Matter;
- Cadmium Sulfides;
- Energy Storage;
- Photoconductivity;
- Dielectric Properties;
- Hall Effect;
- Sodium;
- Thermal Conductivity;
- Solid-State Physics