Characterization of luminescent praseodymium-doped ZrO₂coatings deposited by ultrasonic spray pyrolysis technique

Abstract

ZrO2 : Pr films were synthesized by the ultrasonic spray pyrolysis process. X-ray diffraction studies, as a function of the deposition temperature, indicate a tetragonal crystal structure of zirconia as the substrate temperature was increased. Luminescence (photo- and cathodoluminescence) properties of the films were studied as a function of growth parameters such as the substrate temperature and the praseodymium concentration. For an excitation wavelength of 290 nm, all the photoluminescent emission spectra show peaks located at 490, 510, 566, 615, 642, 695, 718, 740 and 833 nm, associated with the electronic transitions 3 P0 → 3H4, 3P0 → 3 H4, 3P1 + 1I6 → 3H5, 1D2 → 3H4, 3 P0 → 3H6, 1D2 → 3 H5, 1D2 → 3H5, 3 P0 → 3F3,4 and 1D2 → 3 F2 of the Pr3+ ion. As the deposition temperature is increased, an increasing intensity of the luminescence emission is observed. Also, quenching of the luminescence, with increasing doping concentration, is observed. The chemical composition of the films as determined by energy dispersive spectroscopy is reported as well. In addition, the surface morphology characteristics of the films, as a function of the deposition temperature, are presented.

Bright Green Luminescence from Zirconium Oxide Stabilized with Tb<sup>3+</sup> Ions Synthesized by Solution Combustion Technique

“…The undoped ZrO 2 exists in tree isomorphic forms depending of the annealing temperature T a ; if T a < 1170˚C the monoclinic (m) phase is present, if 1170˚C < T a < 2370˚C ZrO 2 is tetragonal (t), while above of 2370˚C ZrO 2 has a cubic (c) phase [4]. However, to obtain the tetragonal and cubic room, stabilized phase is no necessary an increase of temperature since actually there are some chemical methods to stabilize this phase at room temperature, these methods include producing material with grains below a critical size; Garvie [5], Stichert [6], and Valmalette [7] studied the influence of the crystallite size on the BET superficial area, the crystallization temperature, and the phase tran-sition temperature; doping with foreign ions such as Eu 3+ , Tb 4+ , Ca 2+ , Mg 2+ , La 3+ , Y 4+ [2,[8][9][10][11][12][13][14][15][16] etc. ; using specific solvents; Xiulin et al [17] synthesized pure tetragonal and monoclinic phases using polyhydric alcohols and alkil halides respectively.…”

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

“…A research work on ZrO 2 :Pr 3+ films was published in 2007 [65]. In this case, PL and CL properties were studied as a function of growth parameters such as the substrate temperature and the Pr 3+ ions concentration.…”

Luminescent properties of ZrO2:Dy3+ and ZrO2:Dy3++Li+ films synthesized by an ultrasonic spray pyrolysis technique

“…Diverse types of films have been deposited by this technique, some of them are: ZrO 2 , HfO 2 , Al 2 O 3 and ZnAl 2 O 4 [4][5][6][7]. and a substantial amount of work has been reported such as ZrO 2 :Eu [13], ZrO 2 :Tb [14], ZrO 2 :Tm [15], ZrO 2 :Sm [16], ZrO 2 :Er [17], etc.…”