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Improvement of Luminous Efficiency in White Light Emitting Diodes by Reducing a Forward-bias Voltage
Japanese Journal of Applied Physics
A packaging scheme utilizing omni-directional reflective (ODR) optical coating is described to enhance the light extraction of near UV excited, phosphor-converted LEDs. A simple 1D model was developed to analyze the spectra of the extracted light measured with an integrationsphere as a function of phosphor layer concentration and thickness. Quantitative determination of the absorption coefficients at the pump and fluorescent light wavelength along with the conversion coefficient of phosphorsdoi:10.1143/jjap.46.l963 fatcat:c3el4rv6qzh5lkmlh5fmz4ymhy