Academic Journal
Luminescent properties of the Sr8−xBaxMgY(PO4)7:Eu2+ solid solution
| Title: | Luminescent properties of the Sr8−xBaxMgY(PO4)7:Eu2+ solid solution |
|---|---|
| Authors: | Nakyung Lee, Małgorzata Sójka, Jakoah Brgoch |
| Source: | Optical Materials: X, Vol 20, Iss , Pp 100257- (2023) |
| Publisher Information: | Elsevier, 2023. |
| Publication Year: | 2023 |
| Collection: | LCC:Applied optics. Photonics LCC:Optics. Light |
| Subject Terms: | Solid state lighting, Inorganic phosphor, Photoluminescence, Whitlockite, Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467 |
| More Details: | Photoluminescence generated by substituting rare-earth ions on multiple crystallographically independent cation sites within a crystalline host material is one of the most common approaches for creating a full-spectrum phosphor-converted white light-emitting diode (pc-wLED). In this work, a series of complex orthophosphates with the composition (Sr8−xBax)0.99Eu0.08MgY(PO4)7 (x = 0, 1, 2, 3) were synthesized via high-temperature solid-state synthesis. These materials possess five potential substitution sites achieving broadband (5905 cm−1) yellow photoluminescence through multi-site substitution showing a violet-excited photoluminescent quantum yield of nearly 50%. Developing such an efficient broad emission spectrum is crucial for enhancing the color rendering ability of pc-wLEDs. Varying the Sr2+ to Ba2+ shifts the emission color from green-yellow to yellow under violet excitation (λex = 400 nm) while influencing the full-width-at-half-maximum (fwhm). Temperature-dependent photoluminescence measurements indicate that phosphor has good thermal stability with T50, the temperature at which the emission intensity is half of the low-temperature intensity, at 420 K and stable chromaticity coordinates, further supporting that the (Sr8−xBax)0.99Eu0.08MgY(PO4)7 series are promising candidates for LED white lighting. Constructing a prototype pc-wLEDs device using (Sr7Ba)0.99Eu0.08MgY(PO4)7, the highest quantum yield phosphor, produced a functional daylight bulb with a color rendering index (CRI) of 90. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2590-1478 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2590147823000311; https://doaj.org/toc/2590-1478 |
| DOI: | 10.1016/j.omx.2023.100257 |
| Access URL: | https://doaj.org/article/619a96c720594d1fb05d0ca0a09998ff |
| Accession Number: | edsdoj.619a96c720594d1fb05d0ca0a09998ff |
| Database: | Directory of Open Access Journals |
| ISSN: | 25901478 |
|---|---|
| DOI: | 10.1016/j.omx.2023.100257 |
| Published in: | Optical Materials: X |
| Language: | English |