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Measurement and prediction of efficiency loss in LEDs

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Title: Measurement and prediction of efficiency loss in LEDs
Author: Strang, Kiel; Greenstreet, Laura
Issue Date: 2012
Publicly Available in cIRcle 2012-06-08
Series/Report no. University of British Columbia. Science One Program. Research Projects 2011-2012
Abstract: An order of magnitude improvement in power efficiency of light emitting diodes (LEDs) over incandescents makes them ideally suited for a variety of applications. GaInN LEDs, used to produce white light, exhibit a loss of efficiency with increased power. By measuring the efficiency of GaInN and GaAs LEDs we found losses beginning within their rated range. Linear regression allowed us to develop polynomial and power law models for efficiency loss. Models were evaluated using measurements at high power, with the power law model providing the best fit. Our results suggest further research should be conducted on temperature-related efficiency loss and its underlying causes.
Affiliation: Science, Faculty of
URI: http://hdl.handle.net/2429/42461
Peer Review Status: Unreviewed
Scholarly Level: Undergraduate

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