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Enhancement of light extraction efficiency of remote phosphor white light emitting diode using a hemiellipsoidal antireflection subwavelength structure polyethylene terephthalate film

YUNG FANG CHOU1, CHI FENG CHEN1,* , SHANG PING YING2, YUN YING YEH1

Affiliation

  1. Department of Mechanical Engineering, National Central University , Taoyuan City 32001, Taiwan (R.O.C.)
  2. Department of Optoelectronic System Engineering, Minghsin University of Science & Technology, HsinChu 30401, Taiwan (R.O.

Abstract

This study enhanced the light extraction efficiency ( of a remote phosphor white LED by using a hemiellipsoidal antireflection subwavelength structure (ASS) polyethylene terephthalate (PET) film. T he PET film was fabricated and combined with a hemiellipsoidal ASS on the surface of a remote phosphor white LED through a UV curing adhesive process. The improvements in the LEE of the remote phosphor white LED with an ASS PET film are 1 1. 76 % and 23.26% c ompared with the remote phosphor white LED and conventional phosphor converted white LED..

Keywords

FDTD Light extraction efficiency, Antireflection subwavelength structure, Remote phosphor white LED.

Citation

YUNG FANG CHOU, CHI FENG CHEN, SHANG PING YING, YUN YING YEH, Enhancement of light extraction efficiency of remote phosphor white light emitting diode using a hemiellipsoidal antireflection subwavelength structure polyethylene terephthalate film, Optoelectronics and Advanced Materials - Rapid Communications, 11, 5-6, May-June 2017, pp.292-297 (2017).

Submitted at: May 29, 2016

Accepted at: June 7, 2017