Warm-white light-emitting diodes integrated with colloidal quantum dots for high luminous efficacy and color rendering.
Warm-white LEDs (WLEDs) with high spectral quality and efficiency are required for lighting applications, but current experimental performances are limited. We report on nanocrystal quantum dot (NQD) hybridized WLEDs with high performance that exhibit a high luminous efficacy of optical radiation exceeding 350lm/W(opt) and a high color rendering index close to 90 at a low correlated color temperature <3000K. These spectrally engineered WLEDs are obtained using a combination of CdSe/ZnS core/shell NQD nanophosphors integrated on blue InGaN/GaN LEDs.
Department of Electrical and Electronics Engineering, UNAM–Instituteof Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey 06800.
Sedat
S
Nizamoglu
Talha
T
Erdem
Xiao Wei
XW
Sun
Hilmi Volkan
HV
Demir