Results 11 to 20 of about 295,332 (287)

Effect of Surface Texture on Light Extraction Efficiency for LEDs

Crystals, 2023
The light extraction efficiency of an LED is dependent on its surface texture. However, the surface of the p-GaN layer is not easy to be etch with inverted hexagonal pyramid structures (IHPS) with small top widths and large depths using existing methods.
Fu-Der Lai
doaj   +3 more sources

Single-step-fabricated disordered metasurfaces for enhanced light extraction from LEDs [PDF]

Light: Science & Applications, 2021
While total internal reflection (TIR) lays the foundation for many important applications, foremost fibre optics that revolutionised information technologies, it is undesirable in some other applications such as light-emitting diodes (LEDs), which are a ...
Peng Mao, Changxu Liu, Xiyan Li, Mengxia Liu, Qiang Chen, Min Han, Stefan A. Maier, Edward H. Sargent, Shuang Zhang   +8 more
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Model for Light Extraction Efficiency of MicroLEDs

, 2023
For the first time, a semi-analytic formulation of the light extraction efficiency (LEE) of MicroLEDs is presented. The model is based on light tracing equations and delineates the contributions of reflection on the sidewalls of the MicroLEDs to enhance ...
Khaled Ahmed (14320710)
core   +2 more sources

Enhancing the Light Extraction Efficiency in Micro‐Organic Light‐Emitting Diodes with Metalens

Advanced Photonics Research, 2021
Due to the total internal reflection caused by the mismatch of the refractive indices between organic layers and oxide layers within an organic light‐emitting diode (OLED), most of the light energy is trapped inside the device; if the size of an OLED is ...
Jingen Lin, Qian Sun, Weibin Feng, Songming Guo, Zhihao Liu, Haowen Liang, Juntao Li   +6 more
doaj   +2 more sources

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.
Yang H, Zhu JH, Zhao DG, Zhang, SM (reprint author), Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China, smzhang@red.semi.ac.cn, Wang LJ, Zhu JJ, Zhang SM, Wang H, Liu ZS, Jiang DS   +9 more
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Enhancement of Light Extraction Efficiency of UVC-LED by SiO₂ Antireflective Film

Crystals, 2022
In order to achieve high quantum efficiency of AlGaN-based deep ultraviolet light-emitting diodes (UVC-LED), it is important to improve the light extraction efficiency (LEE).
Yu Wang, Zhenxing Lv, Shengli Qi, Yazhu Liu, Hao Long   +4 more
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Light extraction efficiency enhancement of flip-chip blue light-emitting diodes by anodic aluminum oxide [PDF]

Beilstein Journal of Nanotechnology, 2018
We produced an anodic aluminum oxide (AAO) structure with periodic nanopores on the surface of flip-chip blue light-emitting diodes (FC-BLEDs).
Yi-Ru Huang, Yao-Ching Chiu, Kuan-Chieh Huang, Shao-Ying Ting, Po-Jui Chiang, Chih-Ming Lai, Chun-Ping Jen, Snow H. Tseng, Hsiang-Chen Wang   +8 more
doaj   +2 more sources

Ultra-directional and high-efficiency µLEDs via gradient index filled micro-horn collimators [PDF]

Scientific Reports
Micro-LEDs (µLEDs) are poised to transform near-eye AR/VR, display, and optical communication technologies, but they are currently hindered by low light extraction efficiency and non-directional emission. Our study introduces an innovative approach using
Alexander Luce, Rasoul Alaee, Aimi Abass
doaj   +2 more sources

Light Extraction Efficiency and Radiation Patterns of III-Nitride Light-Emitting Diodes With Colloidal Microlens Arrays With Various Aspect Ratios

IEEE Photonics Journal, 2011
The fabrication studies of silica/polystyrene (PS) colloidal microlens arrays with various aspect ratios were performed on the III-nitride light-emitting diodes (LEDs).
Xiao-Hang Li, Renbo Song, Yik-Khoon Ee, Pisist Kumnorkaew, James F. Gilchrist, Nelson Tansu   +5 more
doaj   +3 more sources

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 ...
Yi, Xiaoyan, Liancheng Wang, Zhiqiang Liu, Wang, Liancheng, Li, Jinmin, Guo, Enqing, Guohong Wang, Liu, Zhiqiang, Enqing Guo, Xiaoyan Yi, Cheng, Yan, Jinmin Li, Zhang, Yiyun, Wang, Guohong, Jun Ma, Yan Cheng, Ma, Jun, Yiyun Zhang, Haiyang Zheng   +18 more
core   +2 more sources