Showing papers by "Shimshon Gottesfeld published in 1984"
TL;DR: In this article, the effect of solution composition on the luminescence decay time following picosecond laser pulses is examined for CdS single crystals immersed in various aqueous solutions.
Abstract: The effect of the solution composition on the luminescence decay time following picosecond laser pulses is examined for CdS single crystals immersed in various aqueous solutions A digital simulation technique is demonstrated as an efficient tool for the quantitative analysis of luminescence decay curves in the picosecond time domain, using the exact generation function in the simulation Such analysis yields numerical values for the bulk lifetime, and for the surface recombination velocity A typical value of 25 x 10/sup -9/ s was found for the bulk lifetime of the CdS crystals employed The surface recombination velocity evaluated for an etched crystal immersed in distilled water was less than or equal to 5 x 10/sup 3/ cm/s Immersing the etched CdS crystal in a basic sulfide-polysulfide solution increased the surface recombination velocity to a level of 10/sup 6/ cm/s This indicates a photohole surface capture velocity of greater than or equal to 10/sup 6/ cm/s at a sulfide-covered CdS surface
32 citations