1. Blue and white light emitting high power density LED modules
- Author
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Bernhard Osswald, Jurgen B. Brandner, Benjamin Leyrer, Yi-Chung Huang, Jin-Kai Chang, Wood-Hi Cheng, Christian Herbold, Kirsten Eilert, Franziska Herrmann, and Marc Schneider
- Subjects
Materials science ,business.industry ,Doping ,chemistry.chemical_element ,Optical power ,Phosphor ,High power density ,Nitride ,Optics ,chemistry ,Water cooler ,Aluminium ,White light ,Optoelectronics ,business - Abstract
We present optical measurements of an optimized LED module consisting of 98 blue light emitting LED chips silver-sintered onto an aluminum nitride ceramic substrate within an area of 211 mm2. The module is cooled by a high performance microstructured water cooler. Using this cooler a maximum optical power density of 111.6 W/cm2 at a forward current of 3003 mA and 1255.6 W electrical input power could be achieved. Placing sintered glass discs doped with yellow phosphor in different concentrations in front of the module, white light with correlated color temperatures between 3600 K and 4200 K was produced.
- Published
- 2015
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