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Light Extraction Efficiency Part B. Light Extraction of High Efficient LEDs
2013This 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 +6 more
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Laser & Photonics Reviews
The efficiency of AlGaN based deep ultraviolet light‐emitting diode (DUV LEDs) are mainly hindered by the light extraction issue. In this work, an innovative cooperative scattering structure is introduced that combines a nanopore configuration with an ...
Zhenyu Chen +13 more
semanticscholar +1 more source
The efficiency of AlGaN based deep ultraviolet light‐emitting diode (DUV LEDs) are mainly hindered by the light extraction issue. In this work, an innovative cooperative scattering structure is introduced that combines a nanopore configuration with an ...
Zhenyu Chen +13 more
semanticscholar +1 more source
Light Extraction of High-Efficient Light-Emitting Diodes
2017This 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 +6 more
openaire +1 more source
Improvement for the Light Extraction Efficiency of LightEmitting Diodes
ACTA PHOTONICA SINICA, 2010The 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 Weiping +2 more
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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 +3 more
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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 +3 more
openaire +1 more source
Simulation of the light extraction efficiency of nanostructure light-emitting diodes
Chinese Physics B, 2011The 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 +8 more
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The Light Extraction Efficiency for DUV LEDs
2019DUV LEDs have very low light extraction efficiency (LEE), which is caused by the unique optical polarization and the optically absorptive semiconductor and metal layers. This chapter reviews and analyzes the approaches that have ever been used to improve the LEE.
Zi-Hui Zhang +3 more
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Optics Letters, 2015
An optical scattering layer composed of randomly dispersed nanopatterns (RDNPs) was introduced in an organic light-emitting diode (OLED) to increase the out-coupling efficiency. An RDNP was fabricated by direct printing on a glass substrate. Owing to its low haze and high transmittance, the RDNP acted as a light extraction layer in the OLED.
Yang Doo, Kim +6 more
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An optical scattering layer composed of randomly dispersed nanopatterns (RDNPs) was introduced in an organic light-emitting diode (OLED) to increase the out-coupling efficiency. An RDNP was fabricated by direct printing on a glass substrate. Owing to its low haze and high transmittance, the RDNP acted as a light extraction layer in the OLED.
Yang Doo, Kim +6 more
openaire +2 more sources
Superlattices and Microstructures, 2019
The performance of AlGaN deep ultraviolet(UV) light emitting diodes(LEDs) has been limited by the extremely low light extraction efficiency(LEE), which is due to the severe light absorption by metal electrode and unique transverse magnetic polarization ...
Pengwei Du +4 more
semanticscholar +1 more source
The performance of AlGaN deep ultraviolet(UV) light emitting diodes(LEDs) has been limited by the extremely low light extraction efficiency(LEE), which is due to the severe light absorption by metal electrode and unique transverse magnetic polarization ...
Pengwei Du +4 more
semanticscholar +1 more source
Optics Letters, 2009
We report a threefold enhancement of light-emission intensity at lambda=460 nm and a 16-fold extraction-efficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we
Mei-Ling, Kuo +3 more
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We report a threefold enhancement of light-emission intensity at lambda=460 nm and a 16-fold extraction-efficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we
Mei-Ling, Kuo +3 more
openaire +2 more sources