Essential Factor for Determining Optical Output of Phosphor-Converted LEDs

Tsung Hsun Yang, Cheng Chien Chen, Ching Yi Chen, Yu Yu Chang, Ching Cherng Sun

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


An essential factor of the particle number is exploited for the phosphor excitation in phosphor-converted white LEDs. The particle number can clearly reveal the dependence of the light output flux and the correlated color temperature upon the conventional parameters, thickness, and concentration of the phosphors in a simpler way. In addition, we also find that there might exist an optimal particle number for the maximal luminous light output. An empirical function is then proposed for successfully modeling the relation between the output light and the particle number.

Original languageEnglish
Article number8200209
JournalIEEE Photonics Journal
Issue number2
StatePublished - 1 Apr 2014


  • Light-emitting diodes
  • fluorescent and luminescent materials
  • wavelength conversion devices


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