AOFA-Workshop at AWZ welcomes 150 participants

A highlight of the workshop was the presentation of the Rudolf Jaeckel Prize of the Deutsche Vakuumgesellschaft e.V. (DVG) to Prof. Dr. Eicke R. Weber of the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg.

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Thermally stable phosphors for white LEDs

In some of the white LEDs available commercially, the phosphor is gradually damaged by heat generated by high operating currents. The Fraunhofer AWZ is finding out how to prevent this.

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Luminescent lenses for white light-emitting diodes

Light-emitting diodes (LEDs) are the future of lighting. However, white LEDs have »cold white« color rendering. Fraunhofer AWZ uses a combination of several rare earths to set a wide range of colors and color temperatures.

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Thermal imaging of LEDs

Non-contact and spatially resolved determination of the surface temperature of LED modules is possible with the help of infrared thermography. The Fraunhofer AWZ makes use of this method to improve LED's lifetime.

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Phosphors

Leuchtstoffe Gläser
© Fraunhofer IMWS

Special, rare earth-doped lenses under excitation with UV light.

We work on the characterization and development of phosphors and phosphor systems with the aim of improving phosphor efficiency, reliability and color stability. To do this, we at the Application Center (AWZ) for Inorganic Phosphors in Soest use comprehensive optical and spectroscopic analyses, thermal and microstructure characterizations and investigations into the long-term stability of light-emitting diodes and lighting elements.

The result of our work includes, among other things, phosphor-doped lenses and glass ceramics for lighting and illumination technology and for medical diagnostics. Other fields of research include the characterization of optics for light-emitting diodes and the microstructuring of optics and phosphors.

Our topics:

  • Characterization and assessment of luminaires, light-emitting diodes and phosphors and their long-term stability
  • Production and development of phosphor doped lenses and glass ceramics
  • Thermal management and photometric und photometric assessment of luminaires, light-emitting diodes (LEDs) and LED modules
  • Surface and element investigations, thermal and thermokinetic analyses
  • Structuring of LED optics and phosphors