Thermal droop in III-nitride based light-emitting diodes: Physical origin and perspectives

M Meneghini, C De Santi, A Tibaldi, M Vallone… - Journal of applied …, 2020 - pubs.aip.org
This tutorial paper focuses on the physical origin of thermal droop, ie, the decrease in the
luminescence of light-emitting diodes (LEDs) induced by increasing temperature. III-nitride …

Variable temperature thermal droop characteristics of 255 nm UV LED

S Deng, Z Chen, M Li, M Su, X Zhu, K Xiao… - Applied Physics …, 2022 - pubs.aip.org
Thermal droop, ie, the loss of emission efficiency over a certain temperature range, is an
important performance bottleneck for the successful commercial application of deep …

Extremely high internal quantum efficiency of AlGaN-based quantum wells on face-to-face annealed sputter-deposited AlN templates

H Murotani, A Fujii, R Oshimura, T Kusaba… - Applied Physics …, 2021 - iopscience.iop.org
This study investigated the influence of high-quality AlN templates on the internal quantum
efficiency (IQE) of AlGaN-based multiple quantum wells (MQWs) using photoluminescence …

Strongly localized carriers in Al-rich AlGaN/AlN single quantum wells grown on sapphire substrates

C Frankerl, F Nippert, MP Hoffmann, H Wang… - Journal of Applied …, 2020 - pubs.aip.org
Carrier dynamics in AlGaN-based single quantum well (QW) structures grown on sapphire
are studied by means of time-integrated and time-resolved photoluminescence …

Origin of carrier localization in AlGaN-based quantum well structures and implications for efficiency droop

C Frankerl, F Nippert, A Gomez-Iglesias… - Applied Physics …, 2020 - pubs.aip.org
We investigate carrier localization in Al-rich AlGaN/AlN quantum well (QW) structures. Low
temperature time-resolved photoluminescence (PL) experiments reveal a strong variation of …

Carrier Dynamics in Al‐Rich AlGaN/AlN Quantum Well Structures Governed by Carrier Localization

C Frankerl, F Nippert, MP Hoffmann… - … status solidi (b), 2020 - Wiley Online Library
The carrier dynamics of Al‐rich AlGaN/AlN quantum well (QW) structures in the presence of
strong carrier localization is reported. Excitation density‐dependent photoluminescence (PL) …

Thermophysical characterization of efficiency droop in gan-based light-emitting diodes

TE Nee, JC Wang, BY Zhong, JJ Hsiao, YF Wu - Nanomaterials, 2021 - mdpi.com
An efficiency droop in GaN-based light-emitting diodes (LED) was characterized by
examining its general thermophysical parameters. An effective suppression of emission …

Well Number Dependence of Internal Quantum Efficiency in AlGaN Quantum Wells on Low‐Dislocation Sputtered AlN Templates

K Inai, R Oshimura, K Himeno, M Fujii… - … status solidi (b), 2024 - Wiley Online Library
The internal quantum efficiency (IQE) and cathodoluminescence intensity line profile of
AlGaN multiple quantum well (MQW) structures on low‐dislocation face‐to‐face annealed …

Influence of growth temperature on carrier localization in InGaN/GaN MQWs with strongly redshifted emission band

J Mickevičius, D Dobrovolskas, R Aleksiejūnas… - Journal of Crystal …, 2017 - Elsevier
To shift the emission band to long wavelength side, InGaN/GaN multiple quantum wells
were grown by metalorganic chemical vapor deposition (MOCVD) using pulsed delivery of …

Temperature dependence of efficiency droop in GaN-based blue light-emitting diodes from 20 to 80° C

GH Ryu, DJ Seo, HY Ryu - Current Optics and Photonics, 2018 - opg.optica.org
We investigate the temperature dependence of efficiency droop in InGaN/GaN multiple-
quantum-well (MQW) blue light-emitting diodes (LEDs) in the temperature range from 20 to …