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

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4 Author(s)
Renyong Yu ; Coll. of Opto-Electron. Eng., China Jiliang Univ., Hangzhou, China ; Shangzhong Jin ; Songyuan Cen ; Pei Liang

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.

Published in:

Photonics Technology Letters, IEEE  (Volume:22 ,  Issue: 23 )