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

Sedat Nizamoglu; Talha Erdem; Xiao Wei Sun; Hilmi Volkan Demir

doi:10.1364/OL.35.003372

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

Opt Lett. 2010 Oct 15;35(20):3372-4. doi: 10.1364/OL.35.003372.

Authors

Sedat Nizamoglu¹, Talha Erdem, Xiao Wei Sun, Hilmi Volkan Demir

Affiliation

¹ Department of Electrical and Electronics Engineering, UNAM–Instituteof Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey 06800.

PMID: 20967070
DOI: 10.1364/OL.35.003372

Abstract

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.