Document Detail


Effect of nano-silica filler on the uniform packaging of white light emitting diodes.
MedLine Citation:
PMID:  24205584     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
The packaging process of white light-emitting diodes (WLEDs) take a relatively long time, even when utilizing an automated dispensing system. Therefore the silicone-based packaging formulation and control of rheology during the packaging of LEDs are very important. The effect of phosphor settling during the curing state of LED packaging has been reported. In this work we studied the effect of phosphor paste on the dispensing stage of the WLEDs packaging process utilizing nanosilica particles as viscosity modifiers. With nano-silica in the silicone resin the sedimentation of YAG phosphor particles were effectively blocked and a uniform distribution of YAG phosphor in the cured silicon resin could be achieved. We also examined the incorporation of red quantum dots (QDs) to improve the color rendering index of the WLEDs with the aid of nano-silica as a rheological additive. The application of nano-silica in the layer-by-layer type encapsulation of red QDs was found to be effective in WLEDs packaging, which improved the color rendering index with warm white emission.
Authors:
Deok Jae Hyeon; Tea Hoon Kim; Lee Soon Park
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of nanoscience and nanotechnology     Volume:  13     ISSN:  1533-4880     ISO Abbreviation:  J Nanosci Nanotechnol     Publication Date:  2013 Sep 
Date Detail:
Created Date:  2013-11-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088195     Medline TA:  J Nanosci Nanotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5976-81     Citation Subset:  IM    
Affiliation:
Department of Sensor and Display Engineering, Kyungpook National University, Daegu, 702-701, South Korea.
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