| White LED with High Package Extraction Efficiency
Investigating Organization
Osram Sylvania Product Inc.
Principal Investigator(s)
Yi Zhenh, Matthew Stough
Subcontractor
Alfred University
Funding Source
Building Technologies Program/NETL
Award
DOE Share: $482,964; Contractor Share: $120,741
Contract Period
10/01/06 - 09/30/08
Osram Sylvania Product Inc. is attempting to develop a highly efficient phosphor converting white LED product through increased extraction efficiency of the LED package. A multi-layer thin film coating is applied between LED chip and phosphors to reflect the inward yellow emission, increasing their probability of forward escape. Additionally, a transparent monolithic phosphor may replace the powdered phosphor to reduce the back scattering blue light caused by phosphor powders. The researchers are testing three different coating and phosphor configurations to improve the extraction efficiency of the phosphors-based LED, with a goal of 80 lm/W.
Content dated 2/08 |
