A comparative study is made of the influence of sulfide passivation in an aqueous Na 2 S·9H 2 O solution on the photoconversion parameters of solar radiation in Au-GaAs barrier structures as a function of the character of the microrelief and the pretreatment of the GaAs surface. A quasigrating and a dendritic surface microrelief were produced by anisotropic chemical etching. It is shown that this type of GaAs surface treatment is potentially useful for enhancing the efficiency of a photovoltaic cell stored for several years. A possible mechanism is discussed for the processes leading to changes in the structure parameters.
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Dmitruk et al. (1999) studied this question.
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