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Simulation of the light extraction efficiency of nanostructure light-emitting diodes

Chinese Physics B, 2011
The light extraction efficiencies have been calculated for various InGaN/GaN multiple quantum well nanostructure light-emitting diodes including nanopillar, nanorough of P-GaN surface, coreshell and nano-interlayer structure. From the calculated results we can see that the light extraction efficiency is remarkably improved in the nanostructures ...
Ji-Hong Zhu, Liang-Ji Wang, Shu-Ming Zhang, Hui Wang, De-Gang Zhao, Jian-Jun Zhu, Zong-Shun Liu, De-Sheng Jiang, Hui Yang   +8 more
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Light Extraction Efficiency Part A. Ray Tracing for Light Extraction Efficiency (LEE) Modeling in Nitride LEDs

Topics in Applied Physics, 2013
We describe simulations of the light extraction efficiency (LEE) as a function of the major materials parameters and geometries in the three main LED structures used today, namely nitride LEDs on GaN substrates, on patterned sapphire substrates and flip chip nitride LEDs. We use ray tracing simulations of LEDs to show how the various extraction schemes
C. Lalau Keraly, L. Kuritzky, M. Cochet, C. Weisbuch   +3 more
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Characterization of Light-Extraction Efficiency for WOLEDs with Light-Out-Coupling Layer

Extended Abstracts of the 2013 International Conference on Solid State Devices and Materials, 2015
AbstractWe studied the light extraction efficiencies of white organic light‐emitting diodes with a light‐out‐coupling layer by simulations and experiments. The light extraction efficiencies estimated by the simulation were confirmed to agree well with those measured by the experiments.
M. Harada, H. Wakana, S. Ishihara, S. Nobuki, H. Sakuma, M. Kawasaki, S. Aratani   +6 more
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Light Extraction Efficiency Part B. Light Extraction of High Efficient LEDs

2013
This chapter deals with methods for fabricating high efficient light-emitting diodes (LEDs) with higher light extraction efficiency (LEE). Some LED prototypes are then reviewed to investigate how their performance was enhanced by utilizing a variety of chip processes.
Ja-Yeon Kim, Tak Jeong, Sang Hern Lee, Hwa Sub Oh, Hyung Jo Park, Sang-Mook Kim, Jong Hyeob Baek   +6 more
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Improvement for the Light Extraction Efficiency of LightEmitting Diodes

ACTA PHOTONICA SINICA, 2010
The impact of the refractive index and thickness of substrate on the light extraction efficiency of flip-chip LED is analyzed through simulation analysis.And a new diamond-shaped structure is proposed.The results show that the light extraction efficiency is improved to a good purpose in the diamond-shaped LED,resulting in an increase in the light ...
熊伟平 XIONG Weiping, 范广涵 FAN Guanghan, 李琦 LI Qi   +2 more
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Telling Secrets in the Light: An Efficient Key Extraction Mechanism Via Ambient Light

IEEE Transactions on Wireless Communications, 2021
Due to the benefits of small latency, low energy consumption and increased data rate, device-to-device (D2D) communication is recognized as one of the promising techniques in the 5G era. However, the distributed nature of D2D communication makes it non-trivial to generate symmetric keys for the involving parties.
Youjing Lu, Fan Wu 0006, Qianyi Huang, Shaojie Tang 0001, Guihai Chen   +4 more
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Interplay of sidewall damage and light extraction efficiency of micro-LEDs

Optics Letters, 2022
This Letter describes the impact of shape on micro light-emitting diodes (µLEDs), analyzing 400 µm 2 area µLEDs with various mesa shapes (circular, square, and stripes). Appropriate external quantum efficiency (EQE) can yield internal quantum efficiency (IQE) which decreases with increasing ...
Jeong-Hwan Park, Markus Pristovsek, Wentao Cai, Heajeong Cheong, Takeru Kumabe, Dong-Seon Lee, Tae-Yeon Seong, Hiroshi Amano   +7 more
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Light Extraction of High-Efficient Light-Emitting Diodes

2017
This chapter deals with methods for fabricating high-efficient light-emitting diodes (LEDs) with higher light extraction efficiency (LEE). Some LED prototypes are then reviewed to investigate how their performance was enhanced by utilizing a variety of chip processes.
Ja-Yeon Kim, Tak Jeong, Sang Hern Lee, Hwa Sub Oh, Hyung Jo Park, Sang-Mook Kim, Jong Hyeob Baek   +6 more
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Effects of light extraction efficiency to the efficiency droop of InGaN-based light-emitting diodes

Journal of Applied Physics, 2013
Light extraction efficiency (LEE) droop as an important factor contributing to the efficiency droop of InGaN-based light-emitting diodes (LEDs) has been demonstrated and investigated in detail. The LEE droop effect is induced by the spatial dependence of the extraction efficiency of photons inside of the LED devices and the aggravating crowding effect ...
Yiyun Zhang, Haiyang Zheng, Enqing Guo, Yan Cheng, Jun Ma, Liancheng Wang, Zhiqiang Liu, Xiaoyan Yi, Guohong Wang, Jinmin Li   +9 more
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Improving light extraction efficiency of PhC LED

2016 11th International Conference on Advanced Semiconductor Devices & Microsystems (ASDAM), 2016
In this work we focus on improving light extraction efficiency of PhC LED. Studied LED structure was based on GaAs/AlGaAs material system. 1D PhC was patterned on the top of the LED structure with 3 different periods (500 nm, 600 nm, 800 nm). Several studies confirm improving light extraction efficiency of studied LED structure using PhC patterning. In
P. Hronec, J. Kovac, J. Skriniarova, J. Kovac, F. Uherek   +4 more
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