Enhancement of light extraction from light emitting diodes

AI Zhmakin - Physics Reports, 2011 - Elsevier
The large amount of light emitted from a light emitting diode (LED) being trapped inside the
semiconductor structure is the consequence of the large value of the refractive index. The …

Efficiency models for GaN-based light-emitting diodes: Status and challenges

J Piprek - Materials, 2020 - mdpi.com
Light-emitting diodes (LEDs) based on Gallium Nitride (GaN) have been revolutionizing
various applications in lighting, displays, biotechnology, and other fields. However, their …

Semipolar (20^-2^-1) InGaN/GaN Light-Emitting Diodes for High-Efficiency Solid-State Lighting

DF Feezell, JS Speck, SP DenBaars… - Journal of Display …, 2013 - opg.optica.org
This work examines the effects of polarization-related electric fields on the energy band
diagrams, wavelength shift, wave function overlap, and efficiency droop for InGaN quantum …

From large‐size to micro‐LEDs: scaling trends revealed by modeling

SS Konoplev, KA Bulashevich… - physica status solidi …, 2018 - Wiley Online Library
General trends in scaling dimensions of a circular‐shaped flip‐chip light‐emitting diode
(LED) are studied by coupled electrical‐thermal‐optical simulations. Advanced chip design …

Active-matrix GaN micro light-emitting diode display with unprecedented brightness

J Herrnsdorf, JJD McKendry, S Zhang… - … on Electron Devices, 2015 - ieeexplore.ieee.org
Displays based on microsized gallium nitride light-emitting diodes possess extraordinary
brightness. It is demonstrated here both theoretically and experimentally that the layout of …

Study on the current spreading effect and light extraction enhancement of vertical GaN/InGaN LEDs

CK Li, YR Wu - IEEE transactions on electron devices, 2011 - ieeexplore.ieee.org
This study analyzes the current spreading effect and light extraction efficiency (LEE) of
lateral and vertical light-emitting diodes (LEDs). Specifically, this study uses a fully 2-D …

Current crowding effect on the ideality factor and efficiency droop in blue lateral InGaN/GaN light emitting diodes

VK Malyutenko, SS Bolgov, AD Podoltsev - Applied Physics Letters, 2010 - pubs.aip.org
By examining two types of lateral InGaN/GaN light emitting diodes with different contact
patterns, we demonstrate that in the intermediate range of current where the space-charge …

Effect of die shape and size on performance of III-nitride micro-LEDs: A modeling study

KA Bulashevich, SS Konoplev, SY Karpov - Photonics, 2018 - mdpi.com
Flip-chip truncated-pyramid-shaped blue micro-light-emitting diodes (μ-LEDs), with different
inclinations of the mesa facets to the epitaxial layer plane, are studied by simulations …

Analysis of size-dependent optoelectronic properties of red AlGaInP micro-LEDs

K Fan, K Zheng, J Lv, B Zhao, Y Zhao, Y Chen, Y Qin… - Optics …, 2023 - opg.optica.org
We have theoretically investigated the size-dependent optoelectronic properties of
InGaP/AlGaInP-based red micro-LEDs through an electro-optical-thermal coupling model …

Effects of current, temperature, and chip size on the performance of AlGaInP-based red micro-light-emitting diodes with different contact schemes

DH Lee, SY Lee, JI Shim, TY Seong… - ECS Journal of Solid …, 2021 - iopscience.iop.org
We have investigated the performance of AlGaInP-based red micro-light-emitting diodes
(micro-LEDs) with different n-type contact schemes as functions of current, ambient …