Dual-color emitting quantum-dot-quantum-well CdSe-ZnS heteronanocrystals hybridized on InGaNGaN light emitting diodes for high-quality white light generation

Abstract

We report white light generation by hybridizing green-red emitting (CdSe) ZnSCdSe (core)shell/shell quantum-dot-quantum-well heteronanocrystals on blue InGaNGaN light emitting diodes with the photometric properties of tristimulus coordinates (x,y) = (0.36,0.30), luminous efficacy of optical radiation LE=278 lmW, correlated color temperature CCT=3929 K, and color-rendering index CRI=75.1. We present the photometric analysis and the quantum mechanical design of these dual-color emitting heteronanocrystals synthesized to achieve high-quality white light when hybridized on light emitting diodes. Using such multicolor emitting heteronanocrystals facilitates simple device implementation while providing good photometric properties. © 2008 American Institute of Physics.