scholarly journals Research of LED light extraction efficiency of photonic crystal with square and hexagonal lattice

2009 ◽  
Vol 58 (9) ◽  
pp. 6216
Author(s):  
Chen Jian ◽  
Li Xiao-Li ◽  
Li Hai-Hua ◽  
Wang Qing-Kang
Keyword(s):  
Photonic Crystal ◽  
Extraction Efficiency ◽  
Hexagonal Lattice ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Led Light

Influence of Grating Shape on LED Light Extraction Efficiency

2018 ◽  
Vol 55 (8) ◽  
pp. 082302
Author(s):  
方晓敏 Fang Xiaomin ◽  
江孝伟 Jiang Xiaowei ◽  
赵建伟 Zhao Jianwei
Keyword(s):  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Led Light

scholarly journals Study on Modulation Bandwidth and Light Extraction Efficiency of Flip-Chip Light-Emitting Diode with Photonic Crystals

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 767 ◽  
Author(s):  
Hong Wang ◽  
Ming Zhong ◽  
Lijun Tan ◽  
Wei Shi ◽  
Quanbin Zhou
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Flip Chip ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Experimental Result ◽  
Modulation Bandwidth ◽  
Light Emitting ◽  
Current Densities

In this study, the photonic crystal structure is employed to increase both the light extraction efficiency and the modulation bandwidth of flip-chip GaN-based light-emitting diodes (LEDs). The finite difference time domain method is utilized to investigate the influence of structure of photonic crystals on the Purcell factor and light extraction efficiency of flip-chip GaN-based LEDs. Simulation results show that the modulation bandwidth is estimated to be 202 MHz at current densities of 1000 A/cm2. The experimental result of modulation bandwidth is in accord with the simulation. The optical f-3dB of the device achieves 212 MHz at current densities of 1000 A/cm2 and up to 285 MHz at current densities of 2000 A/cm2. This design of photonic crystal flip-chip LED has the potential for applications in high-frequency visible light communication.

Enhancement of near-UV GaN LED light extraction efficiency by GaN/sapphire template patterning

2012 ◽  
Vol 27 (8) ◽  
pp. 082002 ◽  
Author(s):  
M Ali ◽  
O Svensk ◽  
L Riuttanen ◽  
M Kruse ◽  
S Suihkonen ◽  
...  
Keyword(s):  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Led Light ◽  
Gan Led

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.

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