Recent progress in red light-emitting diodes by III-nitride materials

D Iida, K Ohkawa - Semiconductor Science and Technology, 2021 - iopscience.iop.org
GaN-based light-emitting devices have the potential to realize all visible emissions with the
same material system. These emitters are expected to be next-generation red, green, and …

Polarity in GaN and ZnO: Theory, measurement, growth, and devices

J Zuniga-Perez, V Consonni, L Lymperakis… - Applied Physics …, 2016 - pubs.aip.org
The polar nature of the wurtzite crystalline structure of GaN and ZnO results in the existence
of a spontaneous electric polarization within these materials and their associated alloys (Ga …

InGaN-based red light-emitting diodes: from traditional to micro-LEDs

Z Zhuang, D Iida, K Ohkawa - Japanese Journal of Applied …, 2021 - iopscience.iop.org
InGaN-based LEDs are efficient light sources in the blue–green light range and have been
successfully commercialized in the last decades. Extending their spectral range to the red …

Yellow–red emission from (Ga, In) N heterostructures

B Damilano, B Gil - Journal of Physics D: Applied Physics, 2015 - iopscience.iop.org
Abstract (Ga, In) N-based light emitting devices are very efficient in producing blue light and
to a lesser extent green. Extending their spectral range to longer wavelengths while …

Graphene‐Assisted Epitaxy of Nitrogen Lattice Polarity GaN Films on Non‐Polar Sapphire Substrates for Green Light Emitting Diodes

F Liu, Z Zhang, X Rong, Y Yu, T Wang… - Advanced Functional …, 2020 - Wiley Online Library
Lattice polarity is a key point for hexagonal semiconductors such as GaN. Unfortunately,
only Ga‐polarity GaN have been achieved on graphene till now. Here, the epitaxy of high …

Microstructural analysis of N-polar InGaN directly grown on a ScAlMgO4 (0001) substrate

M Velazquez-Rizo, MA Najmi, D Iida… - Applied Physics …, 2022 - iopscience.iop.org
We report the characterization of a N-polar InGaN layer deposited by metalorganic vapor-
phase epitaxy on a ScAlMgO 4 (0001)(SAM) substrate without a low-temperature buffer …

Reduction of threading dislocation densities of N-polar face-to-face annealed sputtered AlN on sapphire

K Shojiki, K Uesugi, S Kuboya, H Miyake - Journal of Crystal Growth, 2021 - Elsevier
N-polar face-to-face annealed sputtered AlN (FFA Sp-AlN) was fabricated by sputtering with
an Al metal target and high-temperature annealing in a face-to-face configuration. The …

Enhanced performance of N-polar AlGaN-based deep-ultraviolet light-emitting diodes

Z Zhuang, D Iida, K Ohkawa - Optics Express, 2020 - opg.optica.org
We numerically investigated the performance of N-polar AlGaN-based ultraviolet (UV) light-
emitting diodes (LEDs) with different Al contents in quantum wells (QWs) and barriers. We …

Thermodynamic analysis of (0001) and (0001^^¯) GaN metalorganic vapor phase epitaxy

A Kusaba, Y Kangawa, P Kempisty… - … journal of applied …, 2017 - catalog.lib.kyushu-u.ac.jp
We performed a thermodynamic analysis of GaN metalorganic vapor phase epitaxy
considering the (0001) and (000− 1) surface states. Surface reconstruction, which depends …

[HTML][HTML] What is red? On the chromaticity of orange-red InGaN/GaN based LEDs

Y Robin, M Pristovsek, H Amano, F Oehler… - Journal of Applied …, 2018 - pubs.aip.org
The full width at half maximum (FWHM) of the luminescence of visible InGaN quantum well
(QW) based emitters increases with wavelength. This broadening of the luminescence …