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

  title={YAG glass-ceramic phosphor for white LED (II): luminescence characteristics},
  author={Setsuhisa Tanabe and Shunsuke Fujita and S Yoshihara and Akihiko 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… 

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.

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-sintering

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, the

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  =

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)

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.

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 phosphor



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 general

Novel Optical Technologies

  • Proc. DGG symposium

Development of White LED light source', Rare earths, 40, The Rare Earth Society of Japan

  • 2002