High color rendering white light-emitting diodes based on a green silicate phosphor mixed with a red dye-bridged hybrid

Title
High color rendering white light-emitting diodes based on a green silicate phosphor mixed with a red dye-bridged hybrid
Author(s)
곽승연[곽승연]김나리[김나리]김재홍배병수[배병수]
Keywords
QUANTUM DOTS; LEDS; NANOCRYSTALS; OXYNITRIDE
Issue Date
201211
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v.2, no.32, pp.12371 - 12377
Abstract
White light-emitting diodes (LEDs) using a wavelength converter composed of a red dye-bridged hybrid (DBH) mixed with a green silicate phosphor are fabricated. The red DBH is synthesized by chemically bonding epoxy functional oligosiloxane and red fluorescent dye for application in a red wavelength converter of white LEDs. To date, inorganic phosphors and quantum dots have been reported as red emitters. In this report, we suggest a dye based red wavelength converter for high color rendering white LEDs. The structural and optical properties of the DBH are evaluated. The fabricated white LEDs have a high color rendering index up to 90. They show facile color temperature tunability, a broad color gamut, and sufficient efficacy of 33.3 lm W-1 for applications in lighting technology. Also, both forward-bias current stability and long-term thermal stability are achieved for solid-state lighting applications.
URI
http://hdl.handle.net/YU.REPOSITORY/26944http://dx.doi.org/10.1039/c2ra21795c
ISSN
2046-2069
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공과대학 > 화학공학부 > Articles
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