Volume 57, Number 4, February 2002
|Page(s)||592 - 596|
|Section||Condensed matter: electronic structure, electrical, magnetic, and opticalproperties|
|Published online||01 September 2002|
Pyroelectric luminescence via internal Poole-Frenkel effect
University of Cambridge, Department of Earth
Sciences - CB2 3EQ Cambridge, UK
2 University of Osnabrueck, Department of Physics - 49069 Osnabrueck, Germany
3 NASU, Institute of Physics - 46 Prospect Nauki, Kiev, Ukraine
Accepted: 28 November 2001
Pyroelectric luminescence is a universal property of pyroelectric materials under changing temperature. In all compounds studied, inorganic and organic, it has two possible manifestations: Short-emission bursts caused by discharge of the pyroelectric field through the surrounding atmosphere and a smooth luminescence slowly varying with temperature. This latter emission, characteristic for the specific material, still waits for an explanation. With as a sample pyroelectric we show that this luminescence arises from a release of trapped charge carriers, triggered by the pyrolectric field via the Poole-Frenkel effect.
PACS: 77.70.+a – Pyroelectric and electrocaloric effects / 78.60.-b – Other luminescence and radiative recombination
© EDP Sciences, 2002
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