Strong geometrical effects in submillimeter selective area growth and light extraction of GaN light emitting diodes on sapphire

A Tanaka, R Chen, KL Jungjohann, SA Dayeh - Scientific Reports, 2015 - nature.com
Advanced semiconductor devices often utilize structural and geometrical effects to tailor their
characteristics and improve their performance. We report here detailed understanding of …

Comparison of stress states in GaN films grown on different substrates: Langasite, sapphire and silicon

BG Park, RS Kumar, ML Moon, MD Kim, TW Kang… - Journal of Crystal …, 2015 - Elsevier
We demonstrate the evolution of GaN films on novel langasite (LGS) substrate by plasma-
assisted molecular beam epitaxy, and assessed the quality of grown GaN film by comparing …

Wafer-scale thermodynamically stable GaN nanorods via two-step self-limiting epitaxy for optoelectronic applications

H Kum, HK Seong, W Lim, D Chun, Y Kim, Y Park… - Scientific reports, 2017 - nature.com
We present a method of epitaxially growing thermodynamically stable gallium nitride (GaN)
nanorods via metal-organic chemical vapor deposition (MOCVD) by invoking a two-step self …

Deterministically-grown GaN microrods on a mask-free plateau patterned substrate

MJ Ahn, K Shim, WS Jeong, S Kang, H Kim, D Kim… - Vacuum, 2023 - Elsevier
In this study, a polished plateau-patterned sapphire substrate (PP-PSS) was developed to
grow epitaxial GaN microrods using an AlN buffer layer via pulsed metal–organic chemical …

Three-dimensionally-architectured GaN light emitting crystals

DW Yang, D Yoo, WW Lee, JM Lee, GC Yi, WI Park - CrystEngComm, 2017 - pubs.rsc.org
We demonstrate the epitaxial growth of three-dimensional (3D) GaN single crystal arrays
through metal–organic vapor phase epitaxy (MOVPE) on lattice-matched ZnO templates that …

Simulation of the Effect of Gallium Arsenide/Aluminum Gallium Arsenide Multilayer Material Structure on LED Performance

M Kamali Moghaddam - Materials Chemistry Horizons, 2023 - mch.du.ac.ir
In various researches, the effect of different types of semiconductor materials on the
performance of light diodes has been investigated. Gallium arsenide and aluminum gallium …

Large wavelength response to pressure enabled in InGaN/GaN microcrystal LEDs with 3D architectures

DW Yang, K Lee, S Jang, WJ Chang, SH Kim… - ACS …, 2020 - ACS Publications
Optical detection of pressure has the advantage of direct and dynamic indication of the
pressure distribution with a high spatial resolution. In this study, microcrystal (μ-crystal) light …

Nanostructure semiconductor light emitting device having rod and capping layers of differing heights

HS Kum, DM Chun, JH Yeon, HK Seong… - US Patent …, 2017 - Google Patents
There is provided a semiconductor light-emitting device including a base layer formed of a
first conductivity-type semiconductor material, and a plurality of light-emitting nanostructures …

Colour-crafted phosphor-free white light emitters via in-situ nanostructure engineering

D Min, D Park, K Lee, O Nam - Scientific Reports, 2017 - nature.com
Colour-temperature (Tc) is a crucial specification of white light-emitting diodes (WLEDs)
used in a variety of smart-lighting applications. Commonly, Tc is controlled by distributing …

Highly Uniform Array of Hexagonally Symmetric Micro‐Pyramid Structures for Scalable and Single Quantum Dot Emitters

YH Song, HS Yeo, CY Sung, BS Kim… - Advanced Materials …, 2023 - Wiley Online Library
Controlling the site, size, and shape of group III‐nitride quantum dots (QDs) is critical for the
development of mass‐producible single‐photon sources for scalable quantum technologies …