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Adjustable ultraviolet and white light dual emission phosphor Y2Sr(Ga1-yAly)4SiO12:xPr3+ for health lighting.
- Source :
- Physical Chemistry Chemical Physics (PCCP); 3/21/2024, Vol. 26 Issue 11, p8891-8899, 9p
- Publication Year :
- 2024
-
Abstract
- Mid-ultraviolet light (290-320 nm) can promote human vitamin D synthesis, which helps in the prevention and treatment of rickets and cartilage disease. For people who lack sufficient ultraviolet radiation all year round, it is significant to supplement the ultraviolet component in daily lighting sources. However, there are few luminous materials showing a combination of mid-ultraviolet light and white light emission on the market. Here, we designed a new material, Y<subscript>2</subscript>Sr(Ga<subscript>1-y</subscript>Aly)<subscript>4</subscript>SiO<subscript>12</subscript>:xPr<superscript>3+</superscript> (YSGAS:xPr<superscript>3+</superscript>), which achieves dual emission of 320 nm ultraviolet and white light from a single substrate with a single doped phosphor. Without Al<superscript>3+</superscript> ions, the emission intensity of the Y<subscript>2</subscript>SrGa<subscript>4</subscript>SiO<subscript>12</subscript>:xPr<superscript>3+</superscript> phosphor shows a contributiondependent relationship, and concentration quenching due to exchange interaction. The crystal field environment was regulated by partially replacing Ga<superscript>3+</superscript> ions with Al<superscript>3+</superscript> ions. After introducing Al<superscript>3+</superscript>, YSGAS:xPr<superscript>3+</superscript> phosphors exhibit dual ultraviolet emission (320 nm) and visible light emission. The emission color of YSGAS:xPr<superscript>3+</superscript> can be adjusted by changing the Al<superscript>3+</superscript> concentration, and Y<subscript>2</subscript>Sr(Ga<subscript>0.6</subscript>Al<subscript>0.4</subscript>)<subscript>4</subscript>SiO<subscript>12</subscript>:1%Pr<superscript>3+</superscript> emits both ultraviolet light and white light. The LED device prepared by using the YSGAS:Pr<superscript>3+</superscript> phosphor and chips shows a color temperature of 4858 K and appropriate CIE coordinates of (0.3474, 0.3390), indicating wide application prospects in the field of ''health lighting'' for particular populations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639076
- Volume :
- 26
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Academic Journal
- Accession number :
- 176058940
- Full Text :
- https://doi.org/10.1039/d3cp05462d