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T2S4: Materials for Solid-State Lighting

Register for 11th CMCEE

 

Ceramic technologies for sustainable development

 

Solid-state lighting is generated by light emitting diodes (LEDs) by solid-state electroluminescence. Electroluminescent devices are fabricated using either organic or inorganic electroluminescent materials. The active materials are generally semiconductors of bandwidth wide enough to allow the exit of light. While the LED generates monochromatic light, society requires white light. This problem can be solved either by combining several LEDs (e.g. red, blue and green) or by using phosphors. The second solution seems to be more efficient and technologically viable. A wide variety of phosphors is already patented and fabricated by several companies. Oxide, nonoxide, crystalline, and/or amorphous inorganic materials are studied and synthetized for this particular purpose. Computational modeling is also involved to make the selection of the proper materials and dopants more effective for the perspective phosphors. This symposium will cover all aspects of synthesis, simulation, and fabrication of phosphors suitable for the production of white light using LEDs.

 

Proposed session topics:

  • Phosphors for better performance of white LEDs
  • Amorphous phosphors (powders, thin films)
    – Oxide-based phosphors
    – Nonoxide-based phosphors
  • Crystalline phosphors (powders, thin films)
    – Oxide-based phosphors
    – Nonoxide-based phosphors
  • Thin film phosphor processing
  • Thin layer architecture of white emitting phosphors
  • Computer simulation of phosphor composition (excitation, emission wave length)
  • Industrial applications of phosphors 

Organizers:

  • Ralf Riedel, Technical University of Darmstadt, Germany
  • Pavol Sajgalik, SAS Bratislava
  • R.J. Xie, NIMS, Japan
  • K. Hirao, AIST, Japan 

 

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