Photoconductivity and charge trapping in
- 15 November 1981
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 24 (10), 6074-6082
- https://doi.org/10.1103/physrevb.24.6074
Abstract
An electron trap which strongly affects the photoconductivity of colored has been investigated from 10 to 300 K. The trap, which also causes the 260-K thermoluminescence peak and makes possible the interconversion of and centers by optical means, was studied in thermochemically-reduced samples as well as in samples which had been irradiated with high-energy electrons, reactor neutrons, or rays. The activation energy for thermal release of the electron from the trap has been measured as 0.73±0.03 eV from the photoconductivity, thermoluminescence, and phosphorescence. The absorption band for optical release of the electron has been observed in the excitation spectrum of the photoconductivity near 5 eV, with a half-width of ∼0.6 eV. The possible identity of this and other traps is discussed.
Keywords
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