Warm white light generating nanocrystal hybridized LEDs with high color rendering index
Author
Demir, Hilmi Volkan
Nizamoğlu, Sedat
Zengin, Güliş
Date
2008-11Source Title
Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS 2008
Publisher
IEEE
Pages
200 - 201
Language
English
Type
Conference PaperItem Usage Stats
457
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264
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Abstract
By hybridizing custom-design CdSe/ZnS core-shell NC emitters on InGaN/GaN based blue LEDs, we demonstrated three warm-white light sources with desirably low CCT ranging from 3227 K to 1982 K as is required for SSL indoor applications. In these proof-of-concept demonstrations, high color rendering indices (82.4) and high luminous efficacies of emitted spectra (327 lm/W) were achieved, while the color temperature was simultaneously kept low as desired. Our proof-of-concept demonstrations indicated that such nanocrystal luminophor based warm-white LEDs with high-quality photometric properties hold great promise especially for future indoor lighting applications.
Keywords
Hybrid power systemsNanocrystals
Light emitting diodes
Temperature
Stimulated emission
Optical pumping
Optical sensors
Light sources
Phosphors
Zinc compounds