Photovoltaic effects in GaN structures with p-n junctions

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Abstract
Large‐area GaN photovoltaic structures with p‐n junctions have been fabricated using atmospheric pressure metalorganic chemical vapor deposition. The photovoltaic devices typically exhibit selective spectral characteristics with two narrow peaks of opposite polarity. This can be related to p‐n junction connected back‐to‐back with a Schottky barrier. The shape of the spectral characteristic is dependent on the thickness of the n‐ and p‐type regions. The diffusion length of holes in the n‐type GaN region, estimated by theoretical modeling of the spectral response shape, was about 0.1 μm.

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