Study of phosphor characteristic for high-power white LED package

• Main Authors: Hsieng-jen Kong, 孔祥仁
• Other Authors: Ching-cheng Sun
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/88451570421095057342

碩士 === 國立中央大學 === 光電科學研究所 === 97 === In this thesis, we study YAG phosphor characteristic including scattering model, absorption coefficient and conversion efficiency. Mie scattering theory and Monte-Carlo ray tracing are used to describe the scatter of light in the phosphor layer. By fitting absorption coefficient and conversion efficiency of phosphor through experiment and simulation, we have successfully built an optical phosphor model. Furthermore, via using different blue sources to analyze absorption coefficient and conversion efficiency of phosphor, the validity of phosphor model is enhanced. Finally, since re-absorption effect decreases absorption coefficient and conversion efficiency, we analyze this effect by comparing different spectra from experiments.