Persistent photoconductivity in strained epitaxial BiFeO3 thin films.
basic_science · Level V
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- Record sourced from PubMed, PMID 25157996.
- Also identified by DOI 10.1021/nl502183j.
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Abstract
A drastic change in the conductivity of strained BiFeO3 (BFO) films is observed after illuminating them with above-band gap light. This has been termed as persistent photoconductivity. The enhanced conductivity decays exponentially with time. A trapping character of the sub-band levels and their subsequent gradual emptying is proposed as a possible mechanism.