Novel method for estimating phosphor conversion efficiency of light-emitting diodes

Chih Hao Lin, Che Hsuan Huang, Yung Min Pai, Chung Fu Lee, Chien-Chung Lin, Chia-Wei Sun, Cheng-Huan Chen, Chin Wei Sher, Hao-Chung Kuo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


This study presents a novel method for estimating the phosphor conversion efficiency of white light-emitting diodes (WLEDs) with different ratios of phosphors. Numerous attempts have been made for predicting the phosphor conversion efficiency of WLEDs using Monte Carlo ray tracing and the Mie scattering theory. However, because efficiency depends on the phosphor concentration, obtaining a tight match between this model and the experimental results remains a major challenge. An accurate prediction depends on various parameters, including particle size, morphology, and packaging process criteria. Therefore, we developed an efficient model that can successfully correlate the total absorption ratio to the phosphor concentration using a simple equation for estimating the spectra and lumen output. The novel and efficient method proposed here can accelerate WLED development by reducing costs and saving fabrication time.

Original languageEnglish
Article number442
Issue number12
StatePublished - 1 Dec 2018


  • Electro-optical devices
  • Light emitting diode


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