In Operando Micro-Raman Three-Dimensional Thermometry with Diffraction-Limit Spatial Resolution for GaN -based Light-Emitting Diodes

2018 ◽  
Vol 10 (3) ◽  
Author(s):  
T. Park ◽  
Yong-Jing Guan ◽  
Zhi-Qiang Liu ◽  
Yong Zhang
Keyword(s):  
Spatial Resolution ◽  
Light Emitting Diodes ◽  
Three Dimensional ◽  
Diffraction Limit ◽  
Light Emitting ◽  
In Operando

High extraction efficiency in GaN-based light-emitting diodes with air-hole photonic crystal slab

2014 ◽  
Vol 28 (21) ◽  
pp. 1450173 ◽  
Author(s):  
Dan Liu ◽  
Hui Liu ◽  
Jin Hou ◽  
Yihua Gao
Keyword(s):  
Photonic Crystal ◽  
Light Emitting Diodes ◽  
Extraction Efficiency ◽  
Three Dimensional ◽  
Expansion Method ◽  
Light Emitting ◽  
Hole Radius ◽  
Parameters Tuning ◽  
Gan Led ◽  
Air Hole

In this paper, extraction efficiency in simplified and layered light-emitting diodes (LEDs) of GaN photonic crystal with periodic air holes is studied by three-dimensional finite-difference time-domain method. Photonic band structures of the photonic crystal are obtained by plane-wave expansion method. The results about simplified GaN -LED show that extraction efficiency is very sensitive to the structure parameters tuning, and increases considerably inside the transverse-electric-like gap region. A maximum extraction efficiency above 90% can be achieved. The effects of the PC thickness and air-hole radius on relative extraction efficiency of layered GaN -LED are analyzed. They show optimal values to obtain high relative extraction efficiency.

Three-dimensional GaN dodecagonal ring structures for highly efficient phosphor-free warm white light-emitting diodes

Nanoscale ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 4686-4695 ◽  
Author(s):  
Young Chul Sim ◽  
Seung-Hyuk Lim ◽  
Yang-Seok Yoo ◽  
Min-Ho Jang ◽  
Sunghan Choi ◽  
...  
Keyword(s):  
White Light ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Three Dimensional ◽  
Light Emitting ◽  
White Leds ◽  
Highly Efficient ◽  
Warm White Light ◽  
Ring Structures ◽  
White Light Emitting Diodes

Multifaceted dodecagonal ring structures emit light of various colours with high efficiency and are demonstrated to be phosphor-free white LEDs.

Enhanced light extraction in n-GaN-based light-emitting diodes with three-dimensional semi-spherical structure

2014 ◽  
Vol 104 (6) ◽  
pp. 061113 ◽  
Author(s):  
Hong-Xing Yin ◽  
Chuan-Rui Zhu ◽  
Yan Shen ◽  
Hai-Fang Yang ◽  
Zhe Liu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Three Dimensional ◽  
Light Extraction ◽  
Light Emitting ◽  
Spherical Structure

scholarly journals Effect of Fabrication Parameters on Three-Dimensional Nanostructures and Device Efficiency of Polymer Light-Emitting Diodes

ACS Nano ◽  
2010 ◽  
Vol 4 (5) ◽  
pp. 2547-2554 ◽  
Author(s):  
Bang-Ying Yu ◽  
Chia-Yi Liu ◽  
Wei-Chun Lin ◽  
Wei-Ben Wang ◽  
I-Ming Lai ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Three Dimensional ◽  
Light Emitting ◽  
Device Efficiency ◽  
Polymer Light Emitting Diodes ◽  
Fabrication Parameters

Three-dimensional graphene foam-based transparent conductive electrodes in GaN-based blue light-emitting diodes

2013 ◽  
Vol 102 (16) ◽  
pp. 161902 ◽  
Author(s):  
Byung-Jae Kim ◽  
Gwangseok Yang ◽  
Min Joo Park ◽  
Joon Seop Kwak ◽  
Kwang Hyeon Baik ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emitting Diodes ◽  
Three Dimensional ◽  
Graphene Foam ◽  
Light Emitting ◽  
Transparent Conductive Electrodes
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