Luminescent properties in films of ZrO2: Dy

In this work the luminescent characterization of zirconium oxide (ZrO2) films impure with dysprosium (Dy+3) is reported, obtained by means of the ultrasonics spray pyrolysis technique. The films were deposited on glass substrates (Corning), in a temperatures interval of 400 to 550 grades C, using as precursor elements Zirconium oxide chloride octahydrate (ZrOCl2·8H2O) and Dysprosium tri-chloride (DyCl3), dissolved in deionized water, varying the concentration of the contaminated from the 1 to 20 atomic % with relationship to the zirconium in solution. The luminescent characterization was analyzed by means of photoluminescence and thermoluminescence. The photoluminescence results showed a spectrum with three maxima which correspond to the electronic transitions 4F9/2 - 6H15/2, 4F9/2 - 6H13/2 and 4F9/2 - 6H11/2 characteristics of the Dy3+ ion. The thermoluminescence (Tl) response when being exposed to a monochrome UV beam in 240 nm showed a wide curve that exhibits a maxim centered in 200 grades C. The Tl response of ZrO2:Dy in function of the dose was shown lineal in the interval of 24 mJ/cm2 to 432 mJ/cm2. A study of the repeatability and dissipation of the ZrO2:Dy Tl response is included. Considering the shown previous results we can conclude that the ZrO2 in film form obtained by spray pyrolysis has luminescent properties in 240 nm. (Author)