(AlGaIn)N ultraviolet LED chips and their use in triphosphor luminescence conversion white LEDs

Joachim Wagner; Ulrich Kaufmann; Klaus Koehler; Michael Kunzer; Wilfried Pletschen; Harald Obloh; Peter Schlotter; Thilo Stephan; Herbert Walcher; Ard Ellens; Wolfgang Rossner; Manfred Kobusch

doi:10.1117/12.469203

6 June 2002 (AlGaIn)N ultraviolet LED chips and their use in triphosphor luminescence conversion white LEDs

Joachim Wagner, Ulrich Kaufmann, Klaus Koehler, Michael Kunzer, Wilfried Pletschen, Harald Obloh, Peter Schlotter, Thilo Stephan, Herbert Walcher, Ard Ellens, Wolfgang Rossner, Manfred Kobusch

Author Affiliations +

Proceedings Volume 4641, Light-Emitting Diodes: Research, Manufacturing, and Applications VI; (2002) https://doi.org/10.1117/12.469203
Event: Symposium on Integrated Optoelectronic Devices, 2002, San Jose, California, United States

Abstract

We report on the development of (AlGaIn)N quantum well LEDs covering the 380 to 430 nm wavelength range, which serve as the primary light source for tri-phosphor luminescence conversion white LEDs. Epitaxial layer growth was performed by low-pressure metal-organic chemical vapor deposition on sapphire substrates. Mesa LEDs were fabricated and either mounted in standard epoxy-based 5 mm radial LED packages or flip-chip bonded on ceramic submounts. Then, LED-chips with peak wavelengths matching the absorption spectrum of an appropriately chosen inorganic tri-phosphor blend, were used for the fabrication of single-chip tri-color luminescence conversion white LEDs. These de-vices allowed us to demonstrate the feasibility of the above concept for improved color rendering and tunability.

Citation Download Citation

Joachim Wagner, Ulrich Kaufmann, Klaus Koehler, Michael Kunzer, Wilfried Pletschen, Harald Obloh, Peter Schlotter, Thilo Stephan, Herbert Walcher, Ard Ellens, Wolfgang Rossner, and Manfred Kobusch "(AlGaIn)N ultraviolet LED chips and their use in triphosphor luminescence conversion white LEDs", Proc. SPIE 4641, Light-Emitting Diodes: Research, Manufacturing, and Applications VI, (6 June 2002); https://doi.org/10.1117/12.469203

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