Analysis on light extraction property of AlGaN-based flip-chip ultraviolet light-emitting diodes by the use of self-assembled SiO2 microsphere array

2019 ◽  
Author(s):  
Cheng Liu ◽  
Bryan Melanson ◽  
Yu Kee Ooi ◽  
Matthew Hartensveld ◽  
Jing Zhang
Keyword(s):  
Ultraviolet Light ◽  
Flip Chip ◽  
Light Emitting Diodes ◽  
Light Extraction ◽  
Use Of Self ◽  
Extraction Property ◽  
Light Emitting ◽  
Self Assembled ◽  
Ultraviolet Light Emitting Diodes ◽  
Microsphere Array

Analysis of the Light-Extraction Efficiency of Flip-Chip Deep-Ultraviolet Light-Emitting Diodes with Embedded Photonic Crystals

2021 ◽  
Vol 16 (4) ◽  
pp. 591-596
Author(s):  
Meng Liu ◽  
Xuan Zheng ◽  
Wenfei Liu ◽  
Juan Li ◽  
Wenjing Wang ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Ultraviolet Light ◽  
Flip Chip ◽  
Light Emitting Diodes ◽  
Extraction Efficiency ◽  
Light Extraction ◽  
Light Extraction Efficiency ◽  
Light Emitting ◽  
Deep Ultraviolet ◽  
Ultraviolet Light Emitting Diodes

In the present study, embedded photonic crystals were introduced into the p-GaN contact layer of light-emitting diodes to increase the light-extraction efficiency of flip-chip deep-ultraviolet light-emitting diodes. As demonstrated by performing three-dimensional finite-difference time domain simulation, the embedded photonic crystals could be designed to increase the total reflectivity on the p-GaN contact layer, thereby increasing the light-extraction efficiency. In addition, the effects of the embedded photonic crystals configurations on the light-extraction efficiency of deep-ultraviolet light-emitting diodes were examined. Light-extraction efficiency over 21% for transverse magnetic polarized emission could be generally expected by rigorously optimizing the active layer position, as well as the depth, period, and filling factor of photonic crystals. Moreover, an investigation was conducted on the light-extraction efficiency over the whole ultraviolet spectrum, and more light-extraction efficiency harvest on a broadband ultraviolet spectrum has been achieved as compared with flip-chip planar deep-ultraviolet light-emitting diodes. The optimized structure will be promising for increasing the light-extraction efficiency of AlGaN-based flip-chip deep-ultraviolet light-emitting diodes.

scholarly journals Graphene-Based Transparent Conducting Substrates for GaN/AlGaN Nanocolumn Flip-Chip Ultraviolet Light-Emitting Diodes

2021 ◽  
Author(s):  
Andreas Liudi Mulyo ◽  
Anjan Mukherjee ◽  
Ida Marie Høiaas ◽  
Lyubomir Ahtapodov ◽  
Tron Arne Nilsen ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Flip Chip ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Transparent Conducting ◽  
Ultraviolet Light Emitting Diodes

Fabrication of High‐Voltage Flip Chip Deep Ultraviolet Light‐Emitting Diodes Using an Inclined Sidewalls Structure

2019 ◽  
Vol 216 (16) ◽  
pp. 1900059
Author(s):  
Zhibai Zhong ◽  
Xuanli Zheng ◽  
Jinchai Li ◽  
Jinjian Zheng ◽  
Yashu Zang ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
High Voltage ◽  
Flip Chip ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Ultraviolet ◽  
Ultraviolet Light Emitting Diodes

Nanotexturing in Ultraviolet Light-Emitting Diodes for Enhanced Light Extraction

2006 ◽  
Author(s):  
Thomas J. Suleski ◽  
Yi-Chen Chuang ◽  
D. Jeremy Spivey ◽  
Paolo Batoni ◽  
Edward B. Stokes
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Light Extraction ◽  
Light Emitting ◽  
Ultraviolet Light Emitting Diodes
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