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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 3, Iss. 9 — Sep. 1, 2013
  • pp: 1468–1473

Fabrication of warm, high CRI white LED using non-cadmium quantum dots

Woo-Seuk Song, Sun-Hyoung Lee, and Heesun Yang  »View Author Affiliations


Optical Materials Express, Vol. 3, Issue 9, pp. 1468-1473 (2013)
http://dx.doi.org/10.1364/OME.3.001468


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Abstract

We reported on the synthesis of two bright non-cadmium quantum dots (QDs) of green (512 nm)-emitting InP/ZnS and orange (583 nm)-emitting CuInS2 (CIS)/ZnS core/shell and their application for the fabrication of solid-state lighting device. The spectral overlap between absorptions from both QDs and emission from InGaN-based blue light-emitting diode (LED) chip was excellent. Thus, the efficient down-conversion of blue-to-QD emission for the generation of white light was accomplished by sequentially dispensing InP/ZnS QDs on top of CIS/ZnS ones within epoxy resin. The white QD-LED generated a high-quality white light with a high color rendering index of 90 and a warm color temperature of 3803K under a drive current of 20 mA. Drive current-dependent variations of its primary electroluminescent properties were investigated in details.

© 2013 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(250.5230) Optoelectronics : Photoluminescence
(160.4236) Materials : Nanomaterials

ToC Category:
Fluorescent and Luminescent Materials

History
Original Manuscript: July 26, 2013
Revised Manuscript: August 20, 2013
Manuscript Accepted: August 20, 2013
Published: August 26, 2013

Citation
Woo-Seuk Song, Sun-Hyoung Lee, and Heesun Yang, "Fabrication of warm, high CRI white LED using non-cadmium quantum dots," Opt. Mater. Express 3, 1468-1473 (2013)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-3-9-1468


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