Determination of the energy gap for charged excitations in insulating
- 1 December 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 42 (16) , 10800-10803
- https://doi.org/10.1103/physrevb.42.10800
Abstract
Measurements are reported of the photoconductivity (PO) in reduced, undoped, single-crystal . The spectral dependence of the PC shows a threshold at 2.0±0.1 eV, corresponding to the minimum energy for the creation of charged excitations. Transient measurements indicate that the PC is surprisingly persistent: the average recombination time is longer than 10 s at room teperature.
Keywords
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