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- W1967662564 abstract "► Free carriers dynamics in GaAs treated with various sulfide solutions are studied. ► Treatment with sulfide solutions decreases surface recombination velocity in GaAs. ► Alcoholic solution reduces surface recombination in greater extent than aqueous one. ► Mechanism of interaction of HS − ions with GaAs is different in different solvents. The ultrafast carrier dynamics of GaAs(1 0 0) surfaces passivated with different sulfide solutions is studied by time-resolved measurements of infrared absorption using the femtosecond visible-pump infrared-probe technique. After passivation of n -GaAs(1 0 0) surface with the solution of ammonium sulfide in 2-propanol the three-fold decrease of the surface recombination velocity is observed. The treatment of the n -GaAs(1 0 0) surface with the aqueous sulfide solution has a smaller impact on the surface recombination velocity. The different effect of aqueous and alcoholic sulfide solutions on the efficiency of surface passivation is caused by the different mechanisms of charge transfer at the semiconductor/solution interfaces." @default.
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- W1967662564 date "2013-02-01" @default.
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- W1967662564 title "Effect of surface treatment with different sulfide solutions on the ultrafast dynamics of photogenerated carriers in GaAs(100)" @default.
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- W1967662564 doi "https://doi.org/10.1016/j.apsusc.2012.09.076" @default.
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