Shallow Pb3+ hole traps in lead zirconate titanate ferroelectrics
- 13 September 1993
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 63 (11) , 1519-1521
- https://doi.org/10.1063/1.110761
Abstract
A combination of electron paramagnetic resonance and band structure calculations is used to show that the Pb2+ ions in lead zirconate titanate materials can act as shallow hole traps to give Pb3+ centers. The Pb3+ centers are created by optical illumination and are found to be metastable at room temperature. Their decay kinetics follow a stretched exponential function which suggests dispersive transport. The traps have the same character as the upper valence band which is formed from the hybridization of Pb s and O p states.Keywords
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