Open AccessDesign rules for white light emitters with high light extraction efficiency
Author(s) -
Peifen Zhu,
Hongyang Zhu,
Saroj Thapa,
Gopi C. Adhikari
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.0a1297
Subject(s) - optics , visible spectrum , white light , materials science , optoelectronics , extraction (chemistry) , wavelength , physics , chemistry , chromatography
The finite-difference time-domain method is employed to study the light extraction efficiency of white light emitters. The cone arrays designed on top of white light emitters eliminate the dependency of light extraction on the wavelength and the cavity thickness and that leads to significant enhancement in light extraction efficiency for whole visible light spectrum. The light extraction efficiency of 81% has been achieved. Most importantly, the high extraction efficiency is achieved for the whole visible spectrum from 400 nm to 700 nm. This work will provide guidelines for designing highly efficient white light emitters for general illumination and display purpose.