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- W3031217057 abstract "As one of the successful approaches to GaAs surface passivation, wet-chemical nitridation is applied here to relate the effect of surface passivation to carrier recombination processes in bulk GaAs. By combining time-resolved photoluminescence and optical pump-THz probe measurements, we found that surface hole trapping dominates the decay of photoluminescence, while photoconductivity dynamics is limited by surface electron trapping. Compared to untreated sample dynamics, the optimized nitridation reduces hole- and electron-trapping rate by at least 2.6 and 3 times, respectively. Our results indicate that under ambient conditions, recovery of the fast hole trapping due to the oxide regrowth at the deoxidized GaAs surface takes tens of hours, while it is effectively inhibited by surface nitridation. Our study demonstrates that surface nitridation stabilizes the GaAs surface via reduction of both electron- and hole-trapping rates, which results in chemical and electronical passivation of the bulk GaAs surface." @default.
- W3031217057 created "2020-06-05" @default.
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- W3031217057 date "2020-05-29" @default.
- W3031217057 modified "2023-10-18" @default.
- W3031217057 title "Carrier Recombination Processes in GaAs Wafers Passivated by Wet Nitridation" @default.
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- W3031217057 doi "https://doi.org/10.1021/acsami.0c04892" @default.
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