Dresden 2009 – scientific programme

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DS: Fachverband Dünne Schichten

DS 26: Poster II

DS 26.61: Poster

Wednesday, March 25, 2009, 09:30–12:30, P5

Photoluminescence Properties of Thin Films of Nanoporous Alumina — •Piotr Hamolka, Igor Vrublevski, Vitaliy Sokol, Dmitriy Shimanovich, and Vladimir Parkoun — Hybrid Technology Lab, Department of Nano and Microelectronics, Belarussian State University of Informatics and Radioelectronics, P.Brovki str. 6, 220013, Minsk, Republic of Belarus

Thin nanoporous alumina films for this study were formed using anodizing of Al foils (99.999% purity) with thickness of 25.0 microns in 0.3M oxalic acid solution at 18 °C. The luminescence properties of as-anodized and annealed porous alumina films were investigated using a fluorescence spectrophotometer. Xe lamp was the excitation light source. Annealing of specimens was carried out in air at temperatures from 100 up to 600 °C. Based on photoluminescence (PL) measurements, it has been revealed that the observed blue PL band is asymmetrical. It can be divided into two sub-bands by Gaussian fit. Our experiments have shown that intensity of blue PL band increases with elevation of annealing temperature and reaches maximum for specimens annealed at temperature of about 500 °C.