Large persistent photoconductivity in strontium titanate single crystals

Violet M. Poole; Matthew D. McCluskey

doi:10.1117/12.2207714

27 February 2016 Large persistent photoconductivity in strontium titanate single crystals

Violet M. Poole, Matthew D. McCluskey

Proceedings Volume 9749, Oxide-based Materials and Devices VII; 97490N (2016) https://doi.org/10.1117/12.2207714
Event: SPIE OPTO, 2016, San Francisco, California, United States

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.

Citation Download Citation

Violet M. Poole and Matthew D. McCluskey "Large persistent photoconductivity in strontium titanate single crystals", Proc. SPIE 9749, Oxide-based Materials and Devices VII, 97490N (27 February 2016); https://doi.org/10.1117/12.2207714

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