Size Dependence of Negative Trion Auger Recombination in Photodoped CdSe Nanocrystals

Nano Letters ◽  
2013 ◽  
Vol 14 (1) ◽  
pp. 353-358 ◽  
Author(s):  
Alicia W. Cohn ◽  
Jeffrey D. Rinehart ◽  
Alina M. Schimpf ◽  
Amanda L. Weaver ◽  
Daniel R. Gamelin
Keyword(s):  
Size Dependence ◽  
Auger Recombination ◽  
Cdse Nanocrystals

Effect of Auger recombination in ensemble of CdSe nanocrystals on their luminescence

2019 ◽  
Vol 214 ◽  
pp. 116601 ◽  
Author(s):  
Alexey V. Katsaba ◽  
Sergey A. Ambrozevich ◽  
Vladimir V. Fedyanin ◽  
Alexei G. Vitukhnovsky ◽  
Roman B. Vasiliev
Keyword(s):  
Auger Recombination ◽  
Cdse Nanocrystals

Size Dependence of Second Harmonic Generation in Cdse Nanocrystals

1999 ◽  
Vol 571 ◽  
Author(s):  
M. Jacobsohn ◽  
U. Banin
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Rayleigh Scattering ◽  
Size Dependence ◽  
Second Harmonic ◽  
Particle Surface ◽  
Harmonic Coefficient ◽  
Cdse Nanocrystals ◽  
Generation Process ◽  
Nanocrystal Quantum Dots

ABSTRACTSecond Harmonic Generation in CdSe nanocrystal quantum dots is observed by Hyper-Rayleigh scattering. We use a Ti-Sapphire femtosecond laser at 820 nm to induce the nonlinear optical response of the nanocrystals in solution. The unit cell normalized second harmonic coefficient βn, shows a substantial systematic enhancement in small sizes. The observed size dependence of the second harmonic generation process, is explained assuming two contributions. The first is a bulk-like contribution, from the non-centrosymmetric nanocrystal core, and the second, a contribution from the particle surface. The latter contribution is most significant in small nanocrystals with a substantial proportion of surface atoms.

Size dependence of acoustic and optical vibrational modes of CdSe nanocrystals in glasses

1996 ◽  
Vol 197 (2-3) ◽  
pp. 238-246 ◽  
Author(s):  
L. Saviot ◽  
B. Champagnon ◽  
E. Duval ◽  
I.A. Kudriavtsev ◽  
A.I. Ekimov
Keyword(s):  
Size Dependence ◽  
Cdse Nanocrystals ◽  
Vibrational Modes

Quantum size dependence of femtosecond electronic dephasing and vibrational dynamics in CdSe nanocrystals

1994 ◽  
Vol 49 (20) ◽  
pp. 14435-14447 ◽  
Author(s):  
D. M. Mittleman ◽  
R. W. Schoenlein ◽  
J. J. Shiang ◽  
V. L. Colvin ◽  
A. P. Alivisatos ◽  
...  
Keyword(s):  
Size Dependence ◽  
Cdse Nanocrystals ◽  
Vibrational Dynamics ◽  
Quantum Size ◽  
Electronic Dephasing

Surface Stoichiometry of CdSe Nanocrystals

1998 ◽  
Vol 536 ◽  
Author(s):  
Jason Taylor ◽  
Tadd Kippeny ◽  
Jonathan C. Bennett ◽  
Mengbing Huang ◽  
Leonard C. Feldman ◽  
...  
Keyword(s):  
High Temperature ◽  
Photoelectron Spectroscopy ◽  
Size Dependence ◽  
Intrinsic Property ◽  
Rutherford Backscattering ◽  
Rutherford Backscattering Spectroscopy ◽  
Trioctylphosphine Oxide ◽  
Cdse Nanocrystals ◽  
X Ray

AbstractRutherford backscattering spectroscopy (RBS) has been applied to determine the constitution of prototypical CdSe nanocrystals synthesized by the high temperature pyrolysis of organometallics in trioctylphosphine oxide (TOPO). The diameter of the nanocrystals was varied from 22 Å to 58 Å. For all nanocrystal sizes the nanocrystals are Cd rich with an average Cd:Se ratio of 1.2 ± 0.1. The Cd:Se stoichiometery is independent of the starting Cd:Se ratio used for nanocrystal preparation, indicating the excess Cd is not associated with the initial abundance but is an intrinsic property of nanocrystals prepared by this method. The size dependence of excess Cd indicates the extra Cd is on the surface of the crystallite. The coverage of the surface passivating TOPO ligands has also been determined and is larger than reported in previous X-ray photoelectron spectroscopy (XPS) studies of Bowen Katari et al. The origin and structural implications of non-stoichoimetric Cd are discussed.

Size dependence of tetrahedral bond lengths in CdSe nanocrystals

2007 ◽  
Vol 90 (16) ◽  
pp. 161911 ◽  
Author(s):  
Pin-Jiun Wu ◽  
Yuri P. Stetsko ◽  
Ku-Ding Tsuei ◽  
Roman Dronyak ◽  
Keng S. Liang
Keyword(s):  
Size Dependence ◽  
Cdse Nanocrystals ◽  
Bond Lengths ◽  
Tetrahedral Bond
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