Document Detail


Full down-conversion of amber-emitting phosphor-converted light-emitting diodes with powder phosphors and a long-wave pass filter.
MedLine Citation:
PMID:  20588963     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This paper reports the possibility of a facile optical structure to realize a highly efficient monochromatic amber-emitting light-emitting diode (LED) using a powder-based phosphor-converted LED combined with a long-wave pass filter (LWPF). The capping of a blue-reflecting and amber-passing LWPF enhances both the amber emission from the silicate amber phosphor layer and the color purity due to the blocking and recycling of the pumping blue light from the InGaN LED. The enhancement of the luminous efficacy of the amber pc-LED with a LWPF (phosphor concentration 20 wt%, 39.4 lm/W) is 34% over that of an amber pc-LED without a LWPF (phosphor concentration 55 wt%, 29.4 lm/W) at 100 mA and a high color purity (>96%) with Commission International d'Eclairage (CIE) color coordinates of x=0.57 and y=0.42.
Authors:
Jeong Rok Oh; Sang-Hwan Cho; Hoo Keun Park; Ji Hye Oh; Yong-Hee Lee; Young Rag Do
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Optics express     Volume:  18     ISSN:  1094-4087     ISO Abbreviation:  Opt Express     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-06-30     Completed Date:  2010-11-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101137103     Medline TA:  Opt Express     Country:  United States    
Other Details:
Languages:  eng     Pagination:  11063-72     Citation Subset:  IM    
Affiliation:
Department of Chemistry, Kookmin University, Seoul 136-702, Korea.
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MeSH Terms
Descriptor/Qualifier:
Color
Equipment Design
Equipment Failure Analysis
Filtration / instrumentation*
Light
Lighting / instrumentation*
Powders
Semiconductors*
Chemical
Reg. No./Substance:
0/Powders

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