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An analysis of Y2O3:Eu thin films for thermographic phosphor applications |
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| Authors: | Eric J. Bosze Gustavo A. Hirata |
| Affiliation: | a Department of Mechanical and Aerospace Engineering and Materials Science and Engineering Program, UC San Diego, La Jolla, CA 92093-0411, USA b Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Baja California, MX CP 22860, Mexico |
| Abstract: | A comparative study of the luminescent properties of Y2O3:Eu3+ phosphor powders and thin films sputtered from targets prepared from combustion synthesized powders is reported. Thin films of (Y0.96Eu0.04)2O3 were deposited on silicon substrates. Films deposited at 600 °C had both monoclinic and cubic phases of Y2O3, which developed to an oriented cubic phase after annealing. Films and powders showed a linear dependence of the intensity of the 5D7→7F2 (611 nm) transition with temperature in the range 26-660 °C with an average rate of change of 1.8×10−4 °C−1. The rate of change appears to be dependent on the Eu3+ concentration. This work shows that these thin films can be used as thermographic phosphors for remote temperature measurements. |
| Keywords: | Thermographic phosphor Yttrium oxide Thin film Europium Luminescence properties |
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