Highly efficient and thermally stable CaYMgSbO6:Mn4+ double perovskite red phosphor for indoor plant growth
| Autor: | Zhi-xin Ji, Zhi-wei Zhang, Lei Shi, Ya-jie Han |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Doping Analytical chemistry Phosphor Condensed Matter Physics medicine.disease_cause 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Excited state 0103 physical sciences Activator (phosphor) Ultraviolet light medicine Quantum efficiency Electrical and Electronic Engineering Chromaticity Ultraviolet |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 30:3107-3113 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-018-00590-5 |
| Popis: | A novel Mn4+ activated CaYMgSbO6 (CYMS) far-red phosphor was synthesized by high temperature solid state reaction. The sample was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), luminescence spectra, ultraviolet–visible spectra, emission-temperature relationship and internal quantum efficiency (IQE). It is found that CYMS:Mn4+ phosphor has a strong broad excitation band in the range of 200–550 nm. The sample can be excited by ultraviolet and blue light. There is a wide emission band centered at 688 nm between 600 and 760 nm. The optimum doping concentration of Mn4+ is approximately 0.2 mol%. In addition, all the Commission Internationale de L’Eclairage (CIE) chromaticity coordinates of CYMS:0.002Mn4+ located in the far-red region. The concentration quenching mechanism is the dipole-quadrupole interaction of Mn4+ activator. The sample has excellent thermal stability (I423K/I298K = 53.2%). Importantly, the CYMS:0.002 Mn4+ phosphor has an IQE up to 51.5%. Finally, a 365 nm ultraviolet light emitting diode chip combined with CYMS:0.002 Mn4+ phosphor was used to fabricate the LED device. All the results indicated that CYMS:Mn4+ phosphors have potential applications in indoor plant cultivation. |
| Databáze: | OpenAIRE |
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