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Optical temperature sensing properties of Stokes fluorescence-based high color-purity green-emitting Sr2Gd8(SiO4)6O2:Er3+ phosphors
- Source :
- Journal of Alloys and Compounds. 756:82-92
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Fluorescence intensity ratio (FIR)-based optical thermometry has attracted a great deal of attention because it allows accurate and reliable temperature measurements with high spatial resolution and real-time monitoring. Herein, we report the novel Sr2Gd8(SiO4)6O2:Er3+ (SGSO:Er3+) phosphor as an optical thermometry material. The sol-gel method is used to synthesize the oxyapatite structured SGSO:Er3+ phosphors, which exhibits a rod-like morphology. The photoluminescence spectra of SGSO:Er3+ phosphors displays two distinct green emission bands corresponding to the electronic transitions 2H11/2 â 4I15/2 and 4S3/2 â 4I15/2. The temperature-induced variations in the FIR result in a maximum sensitivity of 3.4 × 10â3 Kâ1 at 463 K. Further, the CIE chromaticity coordinates do not shift from the green region when the temperature is increased from 303 to 483 K and the color purity only decreasing from 77.6 to 71.4%. The SGSO:2Er3+ phosphor exhibits the color-purity of 93.5% when excited with low-energy electron beam. These results suggest that the SGSO:2Er3+ phosphor is a promising material for optical temperature sensors and display devices.
- Subjects :
- Photoluminescence
Materials science
business.industry
Mechanical Engineering
Metals and Alloys
Phosphor
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Temperature measurement
Fluorescence
Spectral line
0104 chemical sciences
Mechanics of Materials
Atomic electron transition
Excited state
Materials Chemistry
Optoelectronics
Chromaticity
0210 nano-technology
business
Subjects
Details
- ISSN :
- 09258388
- Volume :
- 756
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........f8441639e9d9cd64a6cd0c005ddf188d