Surface Passivation And Spectral Analysis Of GaAs Material And Its Alloy

GaAs is an important material in III-V group semiconductor materials, we did research on the wet sulfur passivation of GaAs material, aiming at improving its optical properties and the result showed that after 20min-treatment, the luminous intensity increased to 6times. Meantime, we also studied its optical stability, and put forward a method that depositing Al₂O₃ thin film on passivated-samples to solve the poor stability of wet sulfur passivation.GaAsSb is an important material in GaAs alloys, we did research on the wet sulfur passivation of GaAs_0.95Sb_0.05 and GaAs_0.04Sb_0.96 material, aiming at improving their optical properties. After 15min-treatment, the luminous intensity of GaAs_0.95Sb_0.05 material was improved to 2 times, compared with untreated samples. At the same time, we used?NH₄?₂S and S₂Cl₂ solution successively to do exploratory research on GaAs_0.04Sb_0.96 material, the result showed the effect of S₂Cl₂ solution is better, after 10s-treatment, the luminous intensity increased by three orders of magnitude.The optical properties of GaAs and its alloy was improved by passivating, it is of great important to their practical applications.