Synthesis and luminescent properties of Er3+-activated LaBMoO6 green-emitting phosphors for optical thermometry
Highlights: • Under 380 nm excitation, all the samples emitted visible green emissions from the Er{sup 3+} ions. • The optimal doping concentration was 1 mol% and the critical distance was 28.47 Å. • The maximum sensor sensitivity of the studied phosphors was found to be as high as 0.0179 K{sup −1} at 483 K. • The sensor sensitivity of the obtained samples was independent of Er{sup 3+} ion concentration. - Abstract: The Er{sup 3+}-activated LaBMoO{sub 6} phosphors were synthesized by a sol-gel method. The photoluminescence (PL) emission intensity was revealed to be dependent on the Er{sup 3+} ion concentration and its maximum value was achieved when the doping concentration was 1 mol%. From theoretical analysis, one knows that the concentration quenching mechanism is dominated by the electric dipole-dipole interaction with a critical distance of 28.47 Å. On the basis of the temperature-dependent PL green emission spectra from the {sup 2}H{sub 11/2} and {sup 4}S{sub 3/2} thermally coupled levels by means of the fluorescence intensity ratio technique, the temperature sensing properties of the resultant compounds were studied. When the temperature was 483 K, the sensor sensitivity of the studied samples reached up to 0.017 K{sup −1}. It was found that the sensor sensitivity of the prepared phosphors was hardly varied by the doping concentration. These obtained characteristics suggest that the Er{sup 3+}-activated LaBMoO{sub 6} phosphors have potential applications in optical thermometry.
- OSTI ID:
- 22805300
- Journal Information:
- Materials Research Bulletin, Vol. 107; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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