Influence of ferroelectricity on the photoelectric effect of LiNbO3

S. Dunn; D. Tiwari

doi:10.1063/1.2978195

Influence of ferroelectricity on the photoelectric effect of LiNbO3

S. Dunn, D. Tiwari

Cranfield University

Research output: Contribution to journal › Article › peer-review

63 Citations (Scopus)

Abstract

A comparison between domain dependent photochemical and photoelectric cation reduction in LiNbO3 is presented. The reduction in photoelectric threshold for LiNbO3 due to the depolarization field allows UV irradiation to produce free electrons that can participate in photochemical reduction in silver nitrate. This is in addition to domain directed photophysics, where influences on the space charge layer due to the internal dipole of a ferroelectric determine the carrier at the surface. We show that the interaction of photoelectric and domain dependent influences is observed in LiNbO3 due to the low electron affinity (∼1-1.5 eV) and band bending (0.3-0.8 eV).

Original language	English
Article number	092905
Journal	Applied Physics Letters
Volume	93
Issue number	9
DOIs	https://doi.org/10.1063/1.2978195
Publication status	Published - 1 Sept 2008

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10.1063/1.2978195

Cite this

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abstract = "A comparison between domain dependent photochemical and photoelectric cation reduction in LiNbO3 is presented. The reduction in photoelectric threshold for LiNbO3 due to the depolarization field allows UV irradiation to produce free electrons that can participate in photochemical reduction in silver nitrate. This is in addition to domain directed photophysics, where influences on the space charge layer due to the internal dipole of a ferroelectric determine the carrier at the surface. We show that the interaction of photoelectric and domain dependent influences is observed in LiNbO3 due to the low electron affinity (∼1-1.5 eV) and band bending (0.3-0.8 eV).",

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AB - A comparison between domain dependent photochemical and photoelectric cation reduction in LiNbO3 is presented. The reduction in photoelectric threshold for LiNbO3 due to the depolarization field allows UV irradiation to produce free electrons that can participate in photochemical reduction in silver nitrate. This is in addition to domain directed photophysics, where influences on the space charge layer due to the internal dipole of a ferroelectric determine the carrier at the surface. We show that the interaction of photoelectric and domain dependent influences is observed in LiNbO3 due to the low electron affinity (∼1-1.5 eV) and band bending (0.3-0.8 eV).

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