6% external quantum efficiency from InGaAs/(Al)GaAs single quantum well planar microcavity LEDs

1994 ◽  
Vol 30 (21) ◽  
pp. 1787-1789 ◽  
Author(s):  
J. Blondelle ◽  
H. De Neve ◽  
P. Van Daele ◽  
R. Baets ◽  
P. Demeester ◽  
...  
Keyword(s):  
Quantum Well ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Single Quantum ◽  
Single Quantum Well ◽  
Planar Microcavity

Investigation of SiGeSn/GeSn/SiGeSn single quantum well with enhanced well emission

2021 ◽  
Author(s):  
Oluwatobi Olorunsola ◽  
Solomon Ojo ◽  
Grey Abernathy ◽  
Yiyin Zhou ◽  
Sylvester Amoah ◽  
...  
Keyword(s):  
Energy Level ◽  
Quantum Well ◽  
Quantum Efficiency ◽  
Carrier Density ◽  
Photoluminescence Spectra ◽  
Single Quantum ◽  
Pumping Power ◽  
Single Quantum Well ◽  
Carrier Collection ◽  
Ground Energy

Abstract In this work, a SiGeSn/GeSn/SiGeSn single quantum well was grown and characterized. The sample has a thicker GeSn well of 22 nm compared to our previously reported 9-nm well configuration. The thicker well leads to: i) lowered ground energy level in Γ valley offering more bandgap directness; ii) increased carrier density in the well; and iii) improved carrier collection due to increased barrier height. As a result, significantly enhanced emission from the quantum well was observed. The strong photoluminescence signal allows for the estimation of quantum efficiency, which was unattainable in previous studies. Using pumping-power-dependent photoluminescence spectra at 20 K, the peak spontaneous quantum efficiency and external quantum efficiency were measured as 37.9% and 1.45%, respectively.

(InAs)1/(GaAs)2short period superlattice strained single quantum well laser on GaAs substrate

1993 ◽  
Vol 29 (1) ◽  
pp. 98-99 ◽  
Author(s):  
H. Kurakake ◽  
T. Uchida ◽  
H. Soda ◽  
S. Yamazaki
Keyword(s):  
Quantum Well ◽  
Gaas Substrate ◽  
Single Quantum ◽  
Single Quantum Well ◽  
Quantum Well Laser

Thermal quenching of extrinsic photoluminescence of GaAs-Ga1-x Al x As single quantum well

1988 ◽  
Vol 10 (10) ◽  
pp. 1243-1248 ◽  
Author(s):  
Y. Chen ◽  
A. Hameury ◽  
J. Massies ◽  
C. Neri
Keyword(s):  
Quantum Well ◽  
Thermal Quenching ◽  
Single Quantum ◽  
Single Quantum Well
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