TITLE

In-plane electric field induced by polarization and lateral photovoltaic effect in a-plane GaN

AUTHOR(S)
Weiguo Hu; Bei Ma; Dabing Li; Miyake, Hideto; Hiramatsu, Kazumasa
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/8/2009, Vol. 94 Issue 23, p231102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A lateral photovoltaic effect was observed in a-plane GaN films grown on r-plane sapphire at room temperature. Under various light sources illuminations, contacts along the c-axis exhibited about ten times the photovoltage than those along the m-axis, which kept linear relationship with the illumination intensity. It was attributed to anisotropic in-plane electrical field induced by the intrinsic spontaneous/piezoelectric polarization, which spatially separated photogenerated carriers to produce the photovoltage.
ACCESSION #
41573108

 

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