Narrow Emission QD's Improve Warm White LED Performance and Improve Color Rendering

Bhardwaj pointed out that red QDs with tunable peak emission and narrow FHWM in combination with a conventional phosphor material can lead to LED conversion efficiency improvements of 5% to 15% over commercial phosphor based LEDs at CCTs ranging from 5,000 to 2,700 K.

QD based LEDs have shown promise for over a decade after the first demonstration of color conversion with a blue LED. The combination of narrow full width at half-maximum (FHWM) and tunable peak wavelength of red QDs has resulted in 17% efficiency improvement of QD based LEDs compared to commercial red nitride based LEDs. The LED stability with 20 W∕cm2 of incident blue light and QD temperatures over 110°C have passed 3,000 h and continue to show no degradation.