The studies of power efficiency with different phosphor parameters in white LEDs

• Main Authors: Yow-shiuan jeng, 鄭又瑄
• Other Authors: Ching-cherng Sun
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/04603491135103694114

碩士 === 國立中央大學 === 光電科學研究所 === 99 === In this thesis, we studied on the power efficiency with different phosphor concentrations and thicknesses in white LEDs. Based on our silicate phosphor model, we used a blue light laser to excite phosphor plates with different concentrations and thicknesses and analysis the forward power, sideward power and backward power of each phosphor plate in the first time. We also did the experiment to verify our simulation and then used the measurement results to analysis the power efficiency in white LEDs later. Secondly, we changed the light source from a blue light laser to a blue LED and researched the power efficiency with different phosphor concentrations and thicknesses under the remote phosphor configuration. Besides, we also changed the surface reflectance in the simulation in order to figure out the reciprocal effects among phosphor concentration, phosphor thickness and power efficiency in white LEDs.