Luminescence properties of a novel red-emitting phosphor LaBMO 6 : Pr 3+ (M = W, Mo)
| Autor: | H.X. Shen, Y. P. Wang, Z. Ma, F.B. Xiong, Wen-Zhang Zhu, Hai-Jun Lin, Hong-Yi Lin, X.G. Meng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Photoluminescence
Chemistry Organic Chemistry Analytical chemistry Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Inorganic Chemistry law Photoluminescence excitation Diffuse reflection Emission spectrum Electrical and Electronic Engineering Physical and Theoretical Chemistry Chromaticity 0210 nano-technology Luminescence Spectroscopy Light-emitting diode |
| Zdroj: | Optical Materials. 66:474-479 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2017.03.002 |
| Popis: | A novel blue InGaN-chip-based red-emitting phosphor Pr3+: LaBMO6 (M = W, Mo) in pure phase were synthesized via conventional solid-state reaction in air and the photoluminescence properties of the phosphor were investigated for the application in white LEDs. The as-synthesized phosphors were characterized by the X-ray diffraction; diffuse reflection spectra, photoluminescence excitation and emission spectra, the Commission International de L'Eclairage (CIE) chromaticity coordinates and temperature-dependent emission spectra. Orangish red emission band around 575–625 nm was observed in Pr3+-doped LaBMO6 (M = W, Mo) upon 445 nm excitation. Fluorescence concentration quenching in Pr3+-doped LaBMoO6 were observed and the critical distance between Pr3+ ions for energy transfer was calculated to be 8.369 nm. The CIE chromaticity coordinates of Pr3+-doped LaBMoO6 were located in the red spectral region and the temperature-dependent luminescence spectra indicated that Pr3+-doped LaBMoO6 show good thermal stability. All results demonstrated the developed Pr3+-doped LaBMO6 (M = W, Mo) was a novel red phosphor. |
| Databáze: | OpenAIRE |
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