Nanostructured Films of Bi2SeO5 Deposited by Pulsed Laser Ablation

Nanostructured Bi2SeO5 films were deposited on soda-lime glass substrates by the pulsed laser ablation technique, PLA, using a target manufactured from powders synthesized by solid-state reaction, starting from a stoichiometric mixture of the precursors, Bi
2
O
3
and Se. The films, with a thickness of 250 nm and subsequent heat treatment at 550 and 600 °C, present a flake-like nanostructured morphology. From the indexing of the X-ray diffractogram, the obtaining of an orthorhombic structure is confirmed. Morphological characterization was performed using SEM and AFM microscopy. The flake-shaped particles presented thicknesses between 20 and 30 nm and the average roughness measured was 15 nm. From the UV-Vis transmittance spectra, average optical transmittances were obtained in the visible region of the order of 60 % and bandgap magnitudes of 3.3 to 3.7 eV were estimated.