Film Thickness controlled photoluminescence Emission in ZnO:Si Nano-composites

Details Film Thickness controlled photoluminescence Emission in ZnO:Si Nano-composites Film Thickness controlled photoluminescence Emission in ZnO:Si Nano-composites

2011-07-27

arxiv.org/abs/1107.5514v1

Physics

Condensed Matter

Materials Science

Scientific paper

As grown ZnO:Si nanocomposite films fabricated by thermal evaporation showed broad photoluiminescence (PL) spectra due to merging of four prominent peaks viz 370, 410, 470 and 520 nm. Investigations revealed the role of interface in contributing to the two blue peaks at 410 and 470 nm. While the 470 nm is found to vary with ZnO grain size and their density, the 410 nm peak is attributed to the volume of shell surrounding ZnO nanoparticles. This study shows the contribution of ZnO cluster size and their density, as influenced by film thickness, in the PL spectra of the samples.

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