Eu3+-activated Ln2TeO6 (Ln = La, Y) as a novel red-emitting phosphor for warm white LEDs
| Autor: | En Ma, F. X. Xu, X.G. Meng, F.B. Xiong, Wen-Zhang Zhu |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Analytical chemistry Phosphor Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention symbols.namesake law 0103 physical sciences symbols Photoluminescence excitation Emission spectrum Diffuse reflection Electrical and Electronic Engineering Chromaticity Raman spectroscopy Luminescence Light-emitting diode |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 31:22945-22956 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | Novel red-emitting phosphor Ln2TeO6:Eu3+ (Ln = La, Y) was synthesized through a high temperature solid-state reaction method. The material was characterized by X-ray diffraction patterns, Raman spectra, diffuse reflection spectra, photoluminescence excitation and emission spectra, the Commission International de L’Eclairage (CIE) chromaticity coordinates, luminescence decay curves, and temperature-dependent emission spectra. Ln2TeO6:Eu3+ (Ln = La, Y) emitted red light under the excitation of the near-UV and blue light and the concentration quenching mechanism was determined. Combined those phosphors with near-UV chips, the as-fabricated light emitting diode (LED) lamp gave bright red light under a forward bias current. These results demonstrated that Ln2TeO6:Eu3+ (Ln = La, Y) have promising application in phosphor-converted near-UV LED. |
| Databáze: | OpenAIRE |
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