Direct observation of the structure of band-edge biexcitons in colloidal semiconductor CdSe quantum dots

2009 ◽  
Vol 80 (8) ◽  
Author(s):  
Samuel L. Sewall ◽  
Alberto Franceschetti ◽  
Ryan R. Cooney ◽  
Alex Zunger ◽  
Patanjali Kambhampati
Keyword(s):  
Quantum Dots ◽  
Direct Observation ◽  
Band Edge ◽  
Cdse Quantum Dots ◽  
Colloidal Semiconductor

scholarly journals Direct Observation of Electron-to-Hole Energy Transfer in CdSe Quantum Dots

2006 ◽  
Vol 96 (5) ◽  
Author(s):  
E. Hendry ◽  
M. Koeberg ◽  
F. Wang ◽  
H. Zhang ◽  
C. de Mello Donegá ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Direct Observation ◽  
Cdse Quantum Dots ◽  
Hole Energy

Direct observation of energy-gap scaling law in CdSe quantum dots with positrons

2002 ◽  
Vol 66 (4) ◽  
Author(s):  
M. H. Weber ◽  
K. G. Lynn ◽  
B. Barbiellini ◽  
P. A. Sterne ◽  
A. B. Denison
Keyword(s):  
Quantum Dots ◽  
Direct Observation ◽  
Energy Gap ◽  
Scaling Law ◽  
Cdse Quantum Dots

Direct Observation of sp−d Exchange Interactions in Colloidal Mn2+- and Co2+-Doped CdSe Quantum Dots

Nano Letters ◽  
2007 ◽  
Vol 7 (4) ◽  
pp. 1037-1043 ◽  
Author(s):  
Paul I. Archer ◽  
Steven A. Santangelo ◽  
Daniel R. Gamelin
Keyword(s):  
Quantum Dots ◽  
Direct Observation ◽  
Exchange Interactions ◽  
Cdse Quantum Dots

scholarly journals Time-Resolved and Temperature-Dependent Fractional Amplitude Contributions to the Broadband Emission of CdSe Quantum Dots

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1284
Author(s):  
Quinton Rice ◽  
Sangram Raut ◽  
Kyle Burney ◽  
Zygmunt Gryczynski ◽  
Ignacy Gryczynski ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spontaneous Emission ◽  
Spectral Region ◽  
Band Edge ◽  
Band Edge Emission ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Temperature Dependent ◽  
Time Resolved ◽  
Trapped States

The broadband spontaneous emission of excitons in CdSe quantum dots (QDs) is of great interest for the spectral imaging of living organisms or specific substances in the visible spectral region as well as in the biological optical window near the infrared spectral region. Semiconductor QDs that are near the bulk Bohr radius exhibit wide spectral tunability and high color purity due to quantum confinement of excitons within the dot boundary. However, with reducing dot size, the role of the surface-trapped state increases. The temperature-dependent photoluminescence (PL) confirms this with a ~3:1 emission intensity decrease from the surface-trapped state compared to the band edge. Large crystal irregularity, dangling ions, and foreign molecules can introduce new electronic transitions from surface-trapped states that provide broad spontaneous emission in the spectral region from visible to near IR in addition to the band edge emission. The time-resolved PL analyzed the fractional contributions of band edge, surface-trapped states, and possible intermediate trapped states to the broad spectral emission in order to characterize the CdSe QDs.

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

Direct observation of three-photon resonance in water-soluble ZnS quantum dots

2008 ◽  
Vol 92 (13) ◽  
pp. 131114 ◽  
Author(s):  
Jun He ◽  
Gregory D. Scholes ◽  
Yu Long Ang ◽  
Wei Ji ◽  
Cyrus W. J. Beh ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Direct Observation ◽  
Water Soluble ◽  
Photon Resonance
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