Wide Band Gap Materials and DevicesNo Access

OPTIMIZATION OF WHITE ALL-SEMICONDUCTOR LAMP FOR SOLID-STATE LIGHTING APPLICATIONS

ARTŪRAS ŽUKAUSKAS

Institute of Materials Science and Applied Research, Vilnius University, Saulėtekio 9-III, LT-2040 Vilnius, Lithuania

Search for more papers by this author

RIMANTAS VAICEKAUSKAS

Faculty of Mathematics and Information Science, Vilnius University, Naugarduko 24, LT-2006 Vilnius, Lithuania

Search for more papers by this author

FELIKSAS IVANAUSKAS

Faculty of Mathematics and Information Science, Vilnius University, Naugarduko 24, LT-2006 Vilnius, Lithuania

Search for more papers by this author

MICHAEL S. SHUR

Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA

Search for more papers by this author

, and

REMIS GASKA

Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA

Search for more papers by this author

https://doi.org/10.1142/S0129156402001356Cited by:9 (Source: Crossref)

Abstract

A stochastic method is used to optimize white all-semiconductor lamps composed of tree, four, and five primary light-emitting diodes (LEDs) with Gaussian spectra and realistic line widths typical of AlGalnP and AlGalnP LEDs. Within an optimal set of central wavelengths and relative powers, a trade-off between luminous efficacy and the general color rendering index can be performed. The quadrichromatic all-semiconductor lamp is shown to meet most needs of deluxe general lighting. However, practical implementation of this lamp requires substantial improvement of LEDs in the yellow-green region (~570 nm).