Effect of the Phosphor Geometry on the Luminous Flux of Phosphor-Converted Light-Emitting Diodes

  title={Effect of the Phosphor Geometry on the Luminous Flux of Phosphor-Converted Light-Emitting Diodes},
  author={Renyong Yu and Shangzhong Jin and Songyuan Cen and Pei Liang},
  journal={IEEE Photonics Technology Letters},
The effect of the phosphor geometry on the luminous flux of phosphor-converted light-emitting diodes (pcLEDs) is analyzed. Five phosphor geometries are investigated based on ray-tracing simulations. Results show that the curvature of the convex surface is an important factor to influence the luminous flux, and the remote-phosphor pcLED with the phosphor layer of a hemispherically top surface can achieve an improvement of more than 12% compared with the conventional dispersed-coating pcLED. 
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