Abstract
A brief overview is given of the current situation in degradation stability studies of wide gap II–VI laser diodes as the most natural candidates for the blue-green spectral range. Both new design ideas and newly developed wide gap II–VI materials and nanostructures are considered to solve the degradation problem. The thermodynamic instability of the nitrogen acceptor itself under the device operation conditions is claimed as the main reason for the degradation of II–VI lasers of high structural quality. Several experimental results obtained by different groups are presented to support this claim, opening new perspectives for the re-activation of II–VI laser studies.
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