Optical Model for Novel Glass-Based Phosphor-Converted White Light-Emitting Diodes

Author

Li-Yin Chen ; Jin-Kai Chang ; Yi-Ru Wu ; Wei-Chih Cheng ; Ji-Hung Chen ; Chun-Chin Tsai ; Wood-Hi Cheng

Author_Institution

Dept. of Photonics, Nat. Sun Yat-sen Univ., Kaohsiung, Taiwan

Volume

9

Issue

6

fYear

2013

fDate

Jun-13

Firstpage

441

Lastpage

446

Abstract

We proposed an optical model for phosphor-converted white LEDs (pc-WLEDs) that utilized Ce:YAG doped glasses as novel phosphor-converted materials. In this model, precise simulation of the chromatic performance of the glass-based pc-WLEDs was conducted. Between optical simulation and experimental measurement, the color difference ΔE was 1.2%. Meanwhile, the difference of correlated color temperature limited from 1 wt% to 5 wt% phosphor concentration between the simulation and measurement was 184 K. Such a model for glass phosphors will be helpful to design high-power glass-based pc-WLEDs.

Keywords

light emitting diodes; optical glass; phosphors; Ce:YAG doped glasses; YAG:Ce; chromaticity; color difference; correlated color temperature; glass-based pc-WLED; glass-based phosphor-converted white light-emitting diodes; optical simulation; phosphor concentration; Color; Glass; Light emitting diodes; Optical scattering; Optical variables measurement; Phosphors; Temperature measurement; Light-emitting diodes (LEDs); glass phosphor; optical modeling; phosphor-converted LEDs ($pc$-LEDs);

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2012.2226140

Filename

6422328