Novel Method for Estimating Phosphor Conversion Efficiency of Light-Emitting Diodes

Crystals

Chin-Wei Sher¹  Che-Hsuan Huang¹  Chih-Hao Lin¹  Cheng-Huan Chen¹  Chung-Fu Lee¹  Chia-Wei Sun¹  Hao-Chung Kuo¹  Yung-Min Pai¹  Chien-Chung Lin² 

[1] Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan;Institute of Photonic System, National Chiao Tung University, Tainan 711, Taiwan;

关键词: light emitting diode;    electro-optical devices;   

DOI  :  10.3390/cryst8120442

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown