NANOCRYSTALLINE INDIUM SULFIDE LAYERS FOR THIN FILM SOLAR CELLS

摘要

Nanocrystalline indium sulfide films were prepared by thermal evaporation onto quartz and glasssubstrates held at 220–240 °C during the deposition process. High transmittance of the nanocrystalline indium sulfidefilms in the visible region has been observed. Correlations between optical properties and morphology of filmsamples with various thickness have been investigated. Modification of the form and short-wavelength shift of theband edge occur simultaneously upon decreasing of the film thickness from 800 nm up to 30 nm and the involvedmechanisms have been explained. The results indicate that the former effects are assigned to multicomponentcomposition of investigated films and that the elaborated thin films might be suggested as low-cost buffer materialsfor achieving high-efficient thin-film solar cells with chalcopyrite absorber layers.