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• W4313596981 abstract "Micro-light-emitting diodes ($text{ensuremath{mu}}mathrm{LEDs}$) based on $mathrm{Ga}mathrm{N}$ are a key component for next-generation displays, but serious surface $e$-$h$ recombination deteriorates the device efficiency. To gain microscopic insights into the surface recombination, we use hybrid functional first-principles calculations to investigate $mathrm{Ga}$ (${V}_{mathrm{Ga}}$) and $mathrm{N}$ (${V}_{mathrm{N}}$) vacancies on the $mathrm{Ga}mathrm{N}$ $m$ plane that can be created considerably during the production of one-dimensional $mathrm{Ga}mathrm{N}$ structures. We find that the surface ${V}_{mathrm{Ga}}$ is not critical for nonradiative Shockley-Read-Hall (SRH) recombination in light of the large formation energy (>2 eV) and its shallow levels. In contrast, the surface ${V}_{mathrm{N}}$ exhibits a low formation energy (2 eV) and develops a deep defect state near the midgap, indicating the possibility of becoming useful SRH recombination centers. By constructing configuration-coordinate diagrams, we demonstrate that the energy barriers for electron and hole capture on the surface ${V}_{mathrm{N}}$ are small enough to cause significant capture coefficients due to strong electron-phonon coupling." @default.
• W4313596981 created "2023-01-06" @default.
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• W4313596981 date "2023-01-06" @default.
• W4313596981 modified "2023-09-29" @default.
• W4313596981 title "Impact of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mi>Ga</mml:mi></mml:math> and <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mrow><mml:mrow><mml:mi mathvariant=normal>N</mml:mi></mml:mrow></mml:mrow></mml:math> Vacancies at the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mrow><mml:mi>Ga</mml:mi><mml:mi mathvariant=normal>N</mml:mi…" @default.
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• W4313596981 doi "https://doi.org/10.1103/physrevapplied.19.014018" @default.
• W4313596981 hasPublicationYear "2023" @default.
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