Nonradiative damage measured by cathodoluminescence in etched multiple quantum well GaAs/AlGaAs quantum dots

1989 ◽  
Vol 7 (6) ◽  
pp. 2011 ◽  
Author(s):  
E. M. Clausen
Keyword(s):  
Quantum Dots ◽  
Quantum Well ◽  
Multiple Quantum Well ◽  
Multiple Quantum

HRTEM Study of Size‐Controlled Bi Quantum Dots in Annealed GaAsBi/AlAs Multiple Quantum Well Structure

2019 ◽  
Vol 256 (5) ◽  
pp. 1800365 ◽  
Author(s):  
Martynas Skapas ◽  
Sandra Stanionytė ◽  
Tadas Paulauskas ◽  
Renata Butkutė
Keyword(s):  
Quantum Dots ◽  
Quantum Well ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Quantum Well Structure ◽  
Size Controlled

A wavelength engineered emitter incorporating CdSe-based colloidal quantum dots into nanoporous InGaN/GaN multiple quantum well matrix

2011 ◽  
Vol 8 (7-8) ◽  
pp. 2337-2339 ◽  
Author(s):  
Cuong Dang ◽  
Yu Zhang ◽  
Jung Han ◽  
Arto Nurmikko ◽  
Craig Breen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Well ◽  
Multiple Quantum Well ◽  
Colloidal Quantum Dots ◽  
Multiple Quantum

Photorefractive multiple quantum well device using quantum dots as trapping zones

1997 ◽  
Vol 70 (12) ◽  
pp. 1575-1577 ◽  
Author(s):  
A. Le Corre ◽  
C. De Matos ◽  
H. L’Haridon ◽  
S. Gosselin ◽  
B. Lambert
Keyword(s):  
Quantum Dots ◽  
Quantum Well ◽  
Multiple Quantum Well ◽  
Multiple Quantum

RESONANT TUNNELING STUDIES OF VARIABLY SPACED MULTIPLE QUANTUM WELL STRUCTURES IN THE AlGaAs SYSTEM

1987 ◽  
Vol 48 (C5) ◽  
pp. C5-457-C5-461
Author(s):  
C. J. SUMMERS ◽  
K. F. BRENNAN ◽  
A. TORABI ◽  
H. M. HARRIS ◽  
J. COMAS
Keyword(s):  
Quantum Well ◽  
Resonant Tunneling ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Quantum Well Structures

Low-Temperature Operation of Green, Blue and UV InGaN/GaN Multiple-Quantum-Well Light-Emitting Diodes

2003 ◽  
Vol 764 ◽  
Author(s):  
X. A. Cao ◽  
S. F. LeBoeuf ◽  
J. L. Garrett ◽  
A. Ebong ◽  
L. B. Rowland ◽  
...  
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Multiple Quantum Well ◽  
Light Output ◽  
Localized States ◽  
Multiple Quantum ◽  
Nonradiative Recombination ◽  
Light Emitting ◽  
Temperature Range ◽  
Green Leds

Absract:Temperature-dependent electroluminescence (EL) of InGaN/GaN multiple-quantum-well light-emitting diodes (LEDs) with peak emission energies ranging from 2.3 eV (green) to 3.3 eV (UV) has been studied over a wide temperature range (5-300 K). As the temperature is decreased from 300 K to 150 K, the EL intensity increases in all devices due to reduced nonradiative recombination and improved carrier confinement. However, LED operation at lower temperatures (150-5 K) is a strong function of In ratio in the active layer. For the green LEDs, emission intensity increases monotonically in the whole temperature range, while for the blue and UV LEDs, a remarkable decrease of the light output was observed, accompanied by a large redshift of the peak energy. The discrepancy can be attributed to various amounts of localization states caused by In composition fluctuation in the QW active regions. Based on a rate equation analysis, we find that the densities of the localized states in the green LEDs are more than two orders of magnitude higher than that in the UV LED. The large number of localized states in the green LEDs are crucial to maintain high-efficiency carrier capture at low temperatures.

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