scholarly journals Directional emission control and increased light extraction in GaN photonic crystal light emitting diodes

2008 ◽  
Vol 93 (10) ◽  
pp. 103502 ◽  
Author(s):  
K. McGroddy ◽  
A. David ◽  
E. Matioli ◽  
M. Iza ◽  
S. Nakamura ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Light Emitting Diodes ◽  
Emission Control ◽  
Light Extraction ◽  
Light Emitting ◽  
Directional Emission

scholarly journals Light extraction enhancement from nano-imprinted photonic crystal GaN-based blue light-emitting diodes

2006 ◽  
Vol 14 (19) ◽  
pp. 8654 ◽  
Author(s):  
Hyun Kyong Cho ◽  
Junho Jang ◽  
Jeong-Hyeon Choi ◽  
Jaewan Choi ◽  
Jongwook Kim ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Extraction ◽  
Light Emitting

Enhanced light extraction of light-emitting diodes with photonic crystal pattern fabricated by nanoimprint

2008 ◽  
Author(s):  
Kyeong-Jae Byeon ◽  
Seon-Yong Hwang ◽  
Ki-Yeon Yang ◽  
Heon Lee ◽  
Chang-Hee Hong ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Light Emitting Diodes ◽  
Light Extraction ◽  
Light Emitting

scholarly journals The Effect of Anisotropy on Light Extraction of Organic Light-Emitting Diodes with Photonic Crystal Structure

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Wei Xu ◽  
Yang Li
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Light Emitting Diodes ◽  
Extraction Efficiency ◽  
Organic Light Emitting Diodes ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Light Emitting ◽  
Organic Light ◽  
Triangle Lattice

The light extraction efficiency of organic light-emitting diodes (OLED) is greatly limited due to the difference in refractive indexes between materials of OLED. We fabricated OLED with photonic crystal microstructures in the interface between the glass substrate and the ITO anode. The light extraction efficiency can be improved by utilizing photonic crystals; however, the anisotropy effect of light extraction was clearly observed in experiment. To optimize the device performance, the effect of photonic crystal on both light extraction and angular distribution was investigated using finite-difference time domain (FDTD) method. We simulated the photonic crystals with the structure of square lattice and triangle lattice. We analyzed the improvement of these structures in the light extraction efficiency of the OLED and the influence of arrangement, depth, period, and diameter on anisotropy. The optimized geometric parameters were provided, which will provide the theoretical support for designing the high performance OLED.

ENHANCEMENT OF LIGHT EXTRACTING FROM GaN-BASED BLUE LIGHT EMITTING DIODES USING PHOTONIC CRYSTAL

2012 ◽  
Vol 26 (12) ◽  
pp. 1250071 ◽  
Author(s):  
YAN WANG ◽  
FUGEN WU ◽  
XIN ZHANG ◽  
YUANWEI YAO ◽  
HUILIN ZHONG ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Energy ◽  
Light Extraction ◽  
Light Emitting ◽  
Blue Led ◽  
Defect Area

Photonic crystal (PC) structures on LED have been known to enhance the light extraction significantly. In this paper, we report the light energy of GaN -based blue lighting emitting diode (LED) with perfect area photonic crystal (PPC) structure and defect area photonic crystal (DPC) structure. As a result, the light extracting energy of LEDs with PPC structure enhanced little compared to that of without PC structure. In addition, the light extracting energy of blue LED with DPC structure was remarkably improved.

Sign in / Sign up

Export Citation Format

Share Document