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Photoluminescence Upconversion Study of GaN Nanowires: Potential for Optical Refrigeration

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Abstract

Up-converted photoluminescence of GaN nanowires is observed at the temperature above 375 K. At 475 K, the mechanism of the photoluminescence was identified as phonon-assisted bandtail emission. Such a phenomenon contributes to optical refrigeration.

© 2015 Optical Society of America

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