Abstract

This is a comment on a previous Letter [Opt. Lett. 35, 3372 (2010)]. The chromaticity coordinates of nanocrystal quantum dot (NQD)-integrated WLED1, WLED2, and WLED3 are out of the range of the chromaticity tolerance quadrangles of white light sources. So these NQD WLEDs do not satisfy the requirements recommended for general lighting with solid-state lighting products to ensure high-quality white light. Furthermore, correlated color temperatures of WLED2 and WLED3 should be 2682 and $2527\mathrm{K}$, respectively, according to the chromaticity coordinates of WLED2 and WLED3 at $12\mathrm{mA}$, not 2781 and $2390\mathrm{K}$. The NQD-integrated WLED1 and WLED2 located in tolerance quadrangles are simulated by the changing spectral power of green-, yellow-, and orange-emitting NQDs. The simulation results are presented.

© 2011 Optical Society of America

Warm-white light-emitting diodes integrated with colloidal quantum dots for high luminous efficacy and color rendering: reply to comment

Sedat Nizamoglu, Talha Erdem, Xiao Wei Sun, and Hilmi Volkan Demir
Opt. Lett. 36(15) 2852-2852 (2011)

Warm-white light-emitting diodes integrated with colloidal quantum dots for high luminous efficacy and color rendering

Sedat Nizamoglu, Talha Erdem, Xiao Wei Sun, and Hilmi Volkan Demir
Opt. Lett. 35(20) 3372-3374 (2010)

High scotopic/photopic ratio white-light-emitting diodes integrated with semiconductor nanophosphors of colloidal quantum dots

Sedat Nizamoglu, Talha Erdem, and Hilmi Volkan Demir
Opt. Lett. 36(10) 1893-1895 (2011)

Ultra high luminous efficacy of white Zn_xCd_1-xS quantum dots-based white light emitting diodes

C B Siao, K W Wang, H S Chen, Y S Su, and S R Chung
Opt. Mater. Express 6(3) 749-758 (2016)

Color-converting bilayered composite plate of quantum-dot–polymer for high-color rendering white light-emitting diode

Jong-Hoon Kim, Woo-Seuk Song, and Heesun Yang
Opt. Lett. 38(15) 2885-2888 (2013)