Upconversion process in BaY 2 F 8 :Yb 3+ ,Ho 3+ phosphor for optical thermometry
| Autor: | Ashwini K. Sharma, S.J. Dhoble, Govind B. Nair, H.C. Swart |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Precipitation (chemistry) 010401 analytical chemistry Biophysics Optical thermometry Analytical chemistry Phosphor 02 engineering and technology Atmospheric temperature range 021001 nanoscience & nanotechnology Laser 01 natural sciences Photon upconversion 0104 chemical sciences law.invention Fluorescence intensity Chemistry (miscellaneous) law 0210 nano-technology Excitation |
| Zdroj: | Luminescence. 36:1847-1850 |
| ISSN: | 1522-7243 1522-7235 |
| Popis: | A BaY2 F8 :Yb3+ ,Ho3+ phosphor was synthesized using a simple precipitation method. The temperature-sensing properties of BaY2 F8 :Yb3+ ,Ho3+ phosphor were investigated using the fluorescence intensity ratio (FIR) of the thermally coupled energy levels (5 F4 and 5 S2 ) of Ho3+ . Energy transitions 5 F4 →5 I8 and 5 S2 →5 I8 gave rise to emission peaks at 538 nm and 549 nm, respectively. The areas under these two emission peaks were used to calculate the FIR. Temperature-dependent upconversion luminescence was recorded in the temperature range 303-623 K using a 980 nm laser excitation source. The results suggested that the BaY2 F8 :Yb3+ , Ho3+ phosphor has the potential to be used as a non-contact optical temperature sensor. |
| Databáze: | OpenAIRE |
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