Pulsed laser deposition of the doped lanthanum vanadate nanoparticles on glass and silicon substrates

Abstract

Thin films from the lanthanum vanadate nanoparticles were successfully grown by pulsed laser deposition method on glass and silicon substrates for the first time. Morphology and thickness of the films depend on a type of substrate and a number of pulses. The films are of 27 to 220 nm thickness and formed by very small particles up to 20 nm and also can contain single nanoparticles with dimensions 40 to 60 nm and sometimes agglomerates of nanoparticles. Spectral properties of the samples have been investigated and discussed. The vanadate films deposited on the silicon substrates lead to appearance of antireflection properties in the visible range. Luminescence spectra of the investigated films consist of narrow lines caused by f-f transitions in the europium ions. For the samples on glass substrates the wide bands of glass emission are also contributed to the spectra. The optimal experimental conditions those allowed to obtain films promising for applications as luminescent converters are considered.