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• W3120376584 abstract "Abstract In this work we investigate the role of threading dislocations in nitride light emitters with different indium composition. We compare the properties of laser diodes grown on the low defect density GaN substrate with their counterparts grown on sapphire substrate in the same epitaxial process. All structures were produced by metalorganic vapour phase epitaxy and emit light in the range 383–477 nm. We observe that intensity of electroluminescence is strong in the whole spectral region for devices grown on GaN, but decreases rapidly for the devices on sapphire and emitting at wavelength shorter than 420 nm. We interpret this behaviour in terms of increasing importance of dislocation related nonradiative recombination for low indium content structures. Our studies show that edge dislocations are the main source of nonradiative recombination. We observe that long wavelength emitting structures are characterized by higher average light intensity in cathodoluminescence and better thermal stability. These findings indicate that diffusion path of carriers in these samples is shorter, limiting the amount of carriers reaching nonradiative recombination centers. According to TEM images only mixed dislocations open into the V-pits, usually above the multi quantum wells thus not influencing directly the emission." @default.
• W3120376584 created "2021-01-18" @default.
• W3120376584 creator A5031850154 @default.
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• W3120376584 date "2021-01-08" @default.
• W3120376584 modified "2023-10-17" @default.
• W3120376584 title "Role of dislocations in nitride laser diodes with different indium content" @default.
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• W3120376584 doi "https://doi.org/10.1038/s41598-020-79528-z" @default.
• W3120376584 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7794241" @default.
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• W3120376584 hasPublicationYear "2021" @default.
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