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Proceedings Paper

Large persistent photoconductivity in strontium titanate single crystals
Author(s): Violet M. Poole; Matthew D. McCluskey
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Paper Abstract

Strontium titanate is a complex oxide with a range of interesting properties. Annealed samples show persistent photoconductivity at room temperature. When irradiated with sub-gap light, the resistivity drops significantly. The increased conductivity persists for days with negligible decay. This unusual effect is attributed to the excitation of an electron from an acceptor defect into the conduction band. A large barrier for recapture prevents electrons from returning to the defect level. Recent work suggests that optimized annealing conditions result in weakly p-type material prior to illumination.

Paper Details

Date Published: 27 February 2016
PDF: 6 pages
Proc. SPIE 9749, Oxide-based Materials and Devices VII, 97490N (27 February 2016); doi: 10.1117/12.2207714
Show Author Affiliations
Violet M. Poole, Washington State Univ. (United States)
Matthew D. McCluskey, Washington State Univ. (United States)

Published in SPIE Proceedings Vol. 9749:
Oxide-based Materials and Devices VII
Ferechteh H. Teherani; David C. Look; David J. Rogers, Editor(s)

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