Auger recombination and state filling of resonantly excited ground state in CdSe quantum dots

2007 ◽  
Vol 101 (10) ◽  
pp. 103108 ◽  
Author(s):  
J. H. Kim ◽  
K. Kyhm ◽  
S. M. Kim ◽  
Ho-Soon Yang
Keyword(s):  
Quantum Dots ◽  
Ground State ◽  
Auger Recombination ◽  
Cdse Quantum Dots ◽  
State Filling

Auger recombination and intraband absorption of two-photon-excited carriers in colloidal CdSe quantum dots

2007 ◽  
Vol 90 (13) ◽  
pp. 133112 ◽  
Author(s):  
Yingli Qu ◽  
Wei Ji ◽  
Yuangang Zheng ◽  
Jackie Y. Ying
Keyword(s):  
Quantum Dots ◽  
Auger Recombination ◽  
Cdse Quantum Dots ◽  
Two Photon ◽  
Intraband Absorption

Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity

Science ◽  
2019 ◽  
Vol 365 (6454) ◽  
pp. 672-675 ◽  
Author(s):  
Oleg V. Kozlov ◽  
Young-Shin Park ◽  
Jeongkyun Roh ◽  
Igor Fedin ◽  
Tom Nakotte ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ground State ◽  
Auger Recombination ◽  
Optical Gain ◽  
Distributed Feedback ◽  
Semiconductor Materials ◽  
Lasing Threshold ◽  
Ground State Absorption ◽  
Solution Processable ◽  
Compositional Grading

Colloidal semiconductor quantum dots (QDs) are attractive materials for realizing highly flexible, solution-processable optical gain media, but they are difficult to use in lasing because of complications associated with extremely short optical-gain lifetimes limited by nonradiative Auger recombination. By combining compositional grading of the QD’s interior for hindering Auger decay with postsynthetic charging for suppressing parasitic ground-state absorption, we can reduce the lasing threshold to values below the single-exciton-per-dot limit. As a favorable departure from traditional multi-exciton–based lasing schemes, our approach should facilitate the development of solution-processable lasing devices and thereby help to extend the reach of lasing technologies into areas not accessible with traditional, epitaxially grown semiconductor materials.

scholarly journals Photoexcitation Dynamics in Electrochemically Charged CdSe Quantum Dots: From Hot Carrier Cooling to Auger Recombination of Negative Trions

2020 ◽  
Vol 3 (12) ◽  
pp. 12525-12531
Author(s):  
Alireza Honarfar ◽  
Hassan Mourad ◽  
Weihua Lin ◽  
Alexey Polukeev ◽  
Ahibur Rahaman ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Auger Recombination ◽  
Cdse Quantum Dots ◽  
Hot Carrier

Ultrafast fs coherent excitonic dynamics in CdSe quantum dots assemblies addressed and probed by 2D electronic spectroscopy

2021 ◽  
Vol 154 (1) ◽  
pp. 014301
Author(s):  
Elisabetta Collini ◽  
Hugo Gattuso ◽  
R. D. Levine ◽  
F. Remacle
Keyword(s):  
Quantum Dots ◽  
Electronic Spectroscopy ◽  
Cdse Quantum Dots
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