Preparation and investigation of Dy3+-doped Ca9LiGd2/3(PO4)7 single-phase full-color phosphor
| Autor: | Bin Deng, Shihua Liu, Yifan Zhong, Ruijin Yu, Pengfei Sun, Simei Liu, Jingjing Wang, Jung Hyun Jeong |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Dopant Mechanical Engineering Doping Analytical chemistry Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Mechanics of Materials Phase (matter) General Materials Science Thermal stability Photoluminescence excitation 0210 nano-technology Luminescence Powder diffraction |
| Zdroj: | Materials Research Bulletin. 108:275-280 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2018.08.026 |
| Popis: | Novel single-phased white-light-emitting Ca9LiGd2/3(PO4)7:xDy3+ (x = 0.02, 0.05, 0.10, 0.15, 0.20, 0.25, and 0.30) β-Ca3(PO4)2-type phosphate phosphors were synthesized. The phase structure, luminescence, and thermal stability of the phosphors were characterized by X-ray powder diffraction analysis, photoluminescence excitation and emission spectra, thermal quenching, and decay curves. XRD analysis confirmed the phase formation of Ca9LiGd2/3(PO4)7:Dy3+ materials. Under the excitation of 352 nm, the emission of the Ca9LiGd2/3(PO4)7:0.20Dy3+ sample centered at blue (488 nm) and yellow (580 nm), which corresponded to 4F9/2–6H15/2 transition and 4F9/2–6H13/2 transition. The optimum dopant concentration of Dy3+ ions was around 20 mol%, and the critical transfer distance of Dy3+ was calculated as 18 A. The thermal-quenching temperature was above 500 K for Ca9LiGd2/3(PO4)7:0.20Dy3+. The developed phosphor has a great potential as a single-component white-light-emitting phosphor for UV-light-emitting diodes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect