標題: Physical Limitations of Phosphor layer thickness and concentration for White LEDs
作者: Tan, Cher Ming
Singh, Preetpal
Zhao, Wenyu
Kuo, Hao-Chung
光電工程學系
Department of Photonics
公開日期: 5-二月-2018
摘要: Increasing phosphor layer thickness and concentration can enhance the lumen flux of white LED (W-LED). In this work, we found that increasing the phosphor layer thickness and concentration can increase its temperature, and there is also a maximum thickness and concentration beyond which their increase will not lead to lumen increase, but only temperature increase. Higher thickness and higher concentration also results in warm light instead of White light. The maximum thickness and concentration are found to be limited by the scattering of light rays with higher % decrease of blue light rays than the yellow light rays. The results obtained in this work can also be used to compute the temperature and thermo-mechanical stress distribution of an encapsulated LED, demonstrating its usefulness to the design of encapsulated LED packages. Simulation software like ANSYS and TracePro are used extensively to verify the root cause mechanisms.
URI: http://dx.doi.org/10.1038/s41598-018-20883-3
http://hdl.handle.net/11536/144466
ISSN: 2045-2322
DOI: 10.1038/s41598-018-20883-3
期刊: SCIENTIFIC REPORTS
Volume: 8
顯示於類別:期刊論文