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• W2034787813 abstract "Optical metastability has been studied in undoped GaN films grown on SiC substrates having a previously deposited AlN buffer layer. Brief exposures to a higher intensity ultraviolet light resulted in temporary changes in the optical properties of the GaN layer. The photoinduced changes created high contrast patterns on samples that could be observed under an optical microscope with lower intensity ultraviolet excitation. The subband gap yellow photoluminescence peak at 2.2 eV increased significantly after the patterns were created. This change slowly returned (hours) to its initial value at room temperature. The retention time decreased to a few seconds at temperatures above 100 °C. The data showed that a 1.34 eV thermal activation energy exists, which suggests that the cause of these metastable properties is related to the subband gap yellow luminescence." @default.
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• W2034787813 date "2001-07-16" @default.
• W2034787813 modified "2023-09-26" @default.
• W2034787813 title "Optical metastability of subband gap (2.2 eV) yellow luminescence in GaN" @default.
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• W2034787813 doi "https://doi.org/10.1063/1.1381417" @default.
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