YAG glass-ceramic phosphor for white LED (II): luminescence characteristics

  title={YAG glass-ceramic phosphor for white LED (II): luminescence characteristics},
  author={S. Tanabe and S. Fujita and S. Yoshihara and A. Sakamoto and Shigeru Yamamoto},
  booktitle={SPIE Optics + Photonics},
Optical properties of the Ce:YAG glass-ceramic (GC) phosphor for the white LED were investigated. Concentration dependence of fluorescence intensity of Ce3+:5d→4f transition in the GC showed a maximum at 0.5mol%Ce2O3. Quantum efficiency (QE) of Ce3+ fluorescence in the GC materials, the color coordinate and luminous flux of electroluminescence of LED composite were evaluated with an integrating sphere. QE increased with increasing ceramming temperature of the as-made glass. The color… Expand
Control of chromaticity by phosphor in glasses with low temperature sintered silicate glasses for LED applications.
By simply varying the mixing ratio of glass to phosphors as well as the ratio of yellow to red phosphors, the facile control of the CIE chromaticity coordinates and correlated color temperature of the LED following the Planckian locus has been achieved. Expand
The study of luminescence properties on Ce:YAG phosphor in glass co-sintered at different temperatures
Ce:YAG phosphor in glass was prepared by co-sintering bismuthate glass frits and Ce:YAG phosphors at different temperatures in the 550–800 °C range. In this work, the effect of co-sinteringExpand
Layered Ceramic Phosphors Based on CaAlSiN3:Eu and YAG:Ce for White Light‐Emitting Diodes
To develop warm-white light-emitting diodes via conversion phosphors, blue light-emitting diodes are generally combined with mixtures of green and red-emitting phosphor powders. Generally, theExpand
Ce-doped YAG phosphor powder synthesized via microwave combustion and its application for white LED
Abstract. Cerium-doped yttrium aluminum garnet (YAG  :  Ce3  +  ) powder phosphor have been extensively studied as phosphors for blue to white light conversion. Y(3  −  x)Al5O12  :  x Ce3  +   (x  =Expand
Combination of translucent Eu:YAG glass ceramic with LED chip
Luminescent ceramics may exhibit less scattering and increase the conversion efficiency over prior phosphor layers. Recently, the great majority of the commercial white LED (light emitting diodes)Expand
Ceramic Phosphors for Light Conversion in LEDs
In the present article we briefly review some materials research aspects related to ceramic phosphors and discuss both typical characteristics as well as unique features of such optical converters.Expand
Advances in Transparent Glass-Ceramic Phosphors for White Light-Emitting Diodes---A Review
Abstract Currently, the major commercial white light-emitting diode is the phosphor converted LED made of blue-emitting chip and Y 3 Al 5 O 12 :Ce 3+ yellow phosphor dispersed in organic silicone.Expand
Rapid synthesis of Ce3+:YAG via CO2 laser irradiation combustion method: Influence of Ce doping and thickness of phosphor ceramic on the performance of a white LED device
Abstract A new, rapid method was reported to produce Y3Al5O12 phosphors doped with different concentrations of Ce3+ (YAG:Ce3+) within 1.5 min via continuous-wave CO2 laser irradiation, in which a CO2Expand
Facile fabrication and luminescence characteristics of a mixture of phosphors (LuAG: Ce and CaAlSiN3: Eu) in glass for white LED
Abstract The white LED was fabricated using a mixture of phosphors (LuAG: Ce and CaAlSiN3: Eu) in bismuthate glass as converted materials. The phosphors (LuAG: Ce and CaAlSiN3: Eu) in glass wasExpand
High-performance glass phosphor for white-light-emitting diodes via reduction of Si-Ce 3+ :YAG inter-diffusion
A novel Ce3+:YAG doped sodium glass (CeYDG) with low-melting temperature of 693°C and high internal quantum yield of 68% for white-light-emitting diodes (WLEDs) is demonstrated. The glass phosphorExpand


White-Light LEDS
In the not-too-distant future, improvements in luminous flux and luminous efficacy are expected to enable use of white-light LEDS in automobile headlights, large-screen LCD backlighting and generalExpand
Development of White LED light source', Rare earths, 40, The Rare Earth Society of Japan
  • 2002
Novel Optical Technologies
  • Proc. DGG symposium