Up and down: color conversion for solid-state lighting

Paul Hartmann; Peter Pachler; Elisabeth L. Payrer; Stefan Tasch

doi:10.1117/12.809033

3 February 2009 Up and down: color conversion for solid-state lighting

Paul Hartmann, Peter Pachler, Elisabeth L. Payrer, Stefan Tasch

Proceedings Volume 7231, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIII; 72310X (2009) https://doi.org/10.1117/12.809033
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

White light of superior quality is characterized by high efficiency, high color rendering, and suitable spectral shape. Color conversion from semiconductor light sources by use of phosphors appears to be a promising route to cover the customer needs, and in the past a lot of different approaches have been pursued. There are not so many really successful phosphor systems on the market, which is due to the industrial focus on blue LEDs as the excitation source, the increasingly high demands on thermal and photochemical stability (high-power LEDs provide enormous irradiances), and patent limitations. This paper reviews some concepts on color conversion including not only broadly used downconversion but also novel up-conversion principles and discusses the pro's and con's of these approaches.

Citation Download Citation

Paul Hartmann, Peter Pachler, Elisabeth L. Payrer, and Stefan Tasch "Up and down: color conversion for solid-state lighting", Proc. SPIE 7231, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIII, 72310X (3 February 2009); https://doi.org/10.1117/12.809033

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