Blue GaN-based light-emitting diodes grown by molecular-beam epitaxy with external quantum efficiency greater than 1.5%

2004 ◽  
Vol 84 (15) ◽  
pp. 2748-2750 ◽  
Author(s):  
P. Waltereit ◽  
H. Sato ◽  
C. Poblenz ◽  
D. S. Green ◽  
J. S. Brown ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Molecular Beam ◽  
Light Emitting Diodes ◽  
Light Emitting

scholarly journals In(Ga)N Nanostructures and Devices Grown by Molecular Beam Epitaxy and Metal-Assisted Photochemical Etching

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 126
Author(s):  
Abdul Kareem K. Soopy ◽  
Zhaonan Li ◽  
Tianyi Tang ◽  
Jiaqian Sun ◽  
Bo Xu ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Gas Sensors ◽  
Molecular Beam ◽  
Light Emitting Diodes ◽  
Crystal Quality ◽  
Porous Structures ◽  
Light Emitting ◽  
Photochemical Etching ◽  
Recent Advances ◽  
Low Dimensional

This review summarizes the recent research on nitride nanostructures and their applications. We cover recent advances in the synthesis and growth of porous structures and low-dimensional nitride nanostructures via metal-assisted photochemical etching and molecular beam epitaxy. The growth of nitride materials on various substrates, which improves their crystal quality, doping efficiency, and flexibility of tuning performance, is discussed in detail. Furthermore, the recent development of In(Ga)N nanostructure applications (light-emitting diodes, lasers, and gas sensors) is presented. Finally, the challenges and directions in this field are addressed.

scholarly journals Phenylalkylammonium passivation enables perovskite light emitting diodes with record high-radiance operational lifetime: the chain length matters

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuwei Guo ◽  
Sofia Apergi ◽  
Nan Li ◽  
Mengyu Chen ◽  
Chunyang Yin ◽  
...  
Keyword(s):  
Chain Length ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Surface Defects ◽  
Theoretical Modelling ◽  
Ion Migration ◽  
Light Emitting ◽  
Operational Lifetime ◽  
Chain Lengths

AbstractPerovskite light emitting diodes suffer from poor operational stability, exhibiting a rapid decay of external quantum efficiency within minutes to hours after turn-on. To address this issue, we explore surface treatment of perovskite films with phenylalkylammonium iodide molecules of varying alkyl chain lengths. Combining experimental characterization and theoretical modelling, we show that these molecules stabilize the perovskite through suppression of iodide ion migration. The stabilization effect is enhanced with increasing chain length due to the stronger binding of the molecules with the perovskite surface, as well as the increased steric hindrance to reconfiguration for accommodating ion migration. The passivation also reduces the surface defects, resulting in a high radiance and delayed roll-off of external quantum efficiency. Using the optimized passivation molecule, phenylpropylammonium iodide, we achieve devices with an efficiency of 17.5%, a radiance of 1282.8 W sr−1 m−2 and a record T50 half-lifetime of 130 h under 100 mA cm−2.

Molecular beam epitaxy of p-type ZnSTe:N and p-n-junction light emitting diodes

2014 ◽  
Vol 11 (7-8) ◽  
pp. 1282-1285 ◽  
Author(s):  
Kunio Ichino ◽  
Takahiro Kojima ◽  
Shunsuke Obata ◽  
Takuma Kuroyanagi ◽  
Kenta Kimata ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
P Type
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