Improved photoluminescence, thermal stability and temperature sensing performances of K+ incorporated perovskite BaTiO3:Eu3+ red emitting phosphors
| Autor: | Dhananjay Kumar Singh, Kanchan Mondal, J. Manam |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Photoluminescence Process Chemistry and Technology Analytical chemistry Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Thermal stability Ceramic Electric dipole transition 0210 nano-technology Excitation Perovskite (structure) |
| Zdroj: | Ceramics International. 43:13602-13611 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2017.07.069 |
| Popis: | K + ions incorporated perovskite Ba (1−x) TiO 3 :x Eu 3+ red emitting phosphors synthesized via facile solid -state reaction method has been investigated in the current study. The photoluminescence and decay time behavior of Ba (1−x−y) TiO 3 :x Eu 3+ ,yK + phosphors are investigated as a function of Eu 3+ , K + concentration and temperature. An intense and sharp emission peak at 615 nm was exhibited by the phosphors upon excitation at 397 nm ( 7 F 0 → 5 L 6 ). It can be credited to the hypersensitive electric dipole transition 5 D 0 → 7 F 2 , which confirms that Eu 3+ ions are located at non-centrosymmetric site of the host. The incorporation of K + ions in optimized Ba 0.95 TiO 3 :0.05 Eu 3+ phosphor resulted in a remarkable enhancement of photoluminescence intensity by 2.33 times as compared to bare one. The Ba 0.89 TiO 3 :0.05 Eu 3+ , 0.06 K + phosphors were found to observe good temperature sensing along with adequate thermal stability even at 427 K. Furthermore, the photometric parameters have been also studied which are strongly facilitate the prepared ceramic samples as suitable for potential application in lighting. |
| Databáze: | OpenAIRE |
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