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Light extraction efficiency analysis of fluorescent OLEDs device
Optical and Quantum Electronics, 2021Computation simulation study has been performed to demonstrate the fluorescent properties of the organic light-emitting diode (OLED) device structure. The critical angle is defined at emission wavelength 500 nm for the crown glass-air boundary with the radiant intensities of the s- and p-polarized light increased significantly at the critical angle ...
Arvind Sharma, T. D. Das
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Enhanced light extraction efficiency of micropixel geometry AlGaN DUV light-emitting diodes
Applied Physics Express, 2021We report a 1.8 times improved light extraction efficiency for truncated cone AlGaN DUV (275 nm emission) micropixel LEDs when the pixel size was reduced from 90 to 5 μm.
Richard Floyd +6 more
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Light Extraction Efficiency Optimization of AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes
ECS Journal of Solid State Science and Technology, 2020Using finite-difference time-domain method, the light extraction efficiency (LEE) of AlGaN-based deep-ultraviolet light-emitting diodes (DUV LEDs) is investigated. Simulation results show that compared to flat sapphire substrate, the nano-patterned sapphire substrate (NPSS) expands the extraction angles of top surface and sidewalls.
Hui Wan +3 more
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Optics Letters, 2023
The three-primary-color chip array is the most straightforward to realize full-color micro-LED displays. However, the luminous intensity distribution shows high inconsistency between the AlInP-based red micro-LED and GaN-based blue / green micro-LEDs ...
Yongzhen Liu +8 more
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The three-primary-color chip array is the most straightforward to realize full-color micro-LED displays. However, the luminous intensity distribution shows high inconsistency between the AlInP-based red micro-LED and GaN-based blue / green micro-LEDs ...
Yongzhen Liu +8 more
semanticscholar +1 more source
Interplay of sidewall damage and light extraction efficiency of micro-LEDs.
Optics Letters, 2022This Letter describes the impact of shape on micro light-emitting diodes (µLEDs), analyzing 400 µm2 area µLEDs with various mesa shapes (circular, square, and stripes).
Jeong‐Hwan Park +7 more
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, 2020
Chemical etching and Al2O3 dielectric passivation were used to minimize nonradiative sidewall defects in InGaN/GaN microLEDs (mesa diameter = 2–100 μm), resulting in an increase in external quantum efficiency (EQE) as the LED size was decreased.
Ryan T. Ley +6 more
semanticscholar +1 more source
Chemical etching and Al2O3 dielectric passivation were used to minimize nonradiative sidewall defects in InGaN/GaN microLEDs (mesa diameter = 2–100 μm), resulting in an increase in external quantum efficiency (EQE) as the LED size was decreased.
Ryan T. Ley +6 more
semanticscholar +1 more source
Improving light extraction efficiency of PhC LED
2016 11th International Conference on Advanced Semiconductor Devices & Microsystems (ASDAM), 2016In 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 +4 more
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A high-extraction-efficiency nano-patterned organic light-emitting diode
Frontiers in Optics, 2003To improve light extraction from organic light-emitting diodes (OLEDs), we introduced a photonic crystal pattern into the glass substrate of an OLED. The periodic modulation converts the guided waves in the high-refractive-index indium-tin-oxide/organic layers into external leaky waves.
Yong-Jae Lee +7 more
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Light-extraction mechanisms in high-efficiency surface-textured light-emitting diodes
IEEE Journal of Selected Topics in Quantum Electronics, 2002We present a detailed quantitative analysis of the light extraction and loss mechanisms in high-efficiency GaAs-AlGaAs surface-textured thin-film light-emitting diodes (LEDs). The analysis is based on a Monte Carlo simulation. Most input parameters, including scattering of photons at the textured surface, sub-bandgap absorption, and absorption at the ...
R. Windisch +6 more
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