The shell thickness and surface passivation dependence of fluorescence decay kinetics in CdSe/ZnS core-shell and CdSe core colloidal quantum dots

2017 ◽  
Vol 192 ◽  
pp. 860-866 ◽  
Author(s):  
Ruwini D. Rajapaksha ◽  
Mahinda I. Ranasinghe
Keyword(s):  
Quantum Dots ◽  
Shell Thickness ◽  
Surface Passivation ◽  
Fluorescence Decay ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Decay Kinetics ◽  
Cdse Core ◽  
Fluorescence Decay Kinetics

Shell Thickness Engineering Significantly Boosts the Photocatalytic H2 Evolution Efficiency of CdS/CdSe Core/Shell Quantum Dots

2017 ◽  
Vol 9 (41) ◽  
pp. 35712-35720 ◽  
Author(s):  
Ping Wang ◽  
Minmin Wang ◽  
Jie Zhang ◽  
Chuanping Li ◽  
Xiaolong Xu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shell Thickness ◽  
Core Shell ◽  
H2 Evolution ◽  
Cdse Core ◽  
Photocatalytic H2 Evolution

The absorption coefficient of PbSe/CdSe core/shell colloidal quantum dots

2010 ◽  
Vol 97 (16) ◽  
pp. 161908 ◽  
Author(s):  
Bram De Geyter ◽  
Zeger Hens
Keyword(s):  
Quantum Dots ◽  
Absorption Coefficient ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Cdse Core

scholarly journals Synthesis and Optical Properties of Thiol Functionalized CdSe/ZnS (Core/Shell) Quantum Dots by Ligand Exchange

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Huaping Zhu ◽  
Michael Z. Hu ◽  
Lei Shao ◽  
Kui Yu ◽  
Reza Dabestani ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Ligand Exchange ◽  
Surface Passivation ◽  
Emission Spectra ◽  
Trioctylphosphine Oxide ◽  
Core Shell ◽  
Initial Surface ◽  
Cdse Core ◽  
Surface Modified

The colloidal photoluminescent quantum dots (QDs) of CdSe (core) and CdSe/ZnS (core/shell) were synthesized at different temperatures with different growth periods. Optical properties (i.e., UV/Vis spectra and photoluminescent emission spectra) of the resulting QDs were investigated. The shell-protected CdSe/ZnS QDs exhibited higher photoluminescent (PL) efficiency and stability than their corresponding CdSe core QDs. Ligand exchange with various thiol molecules was performed to replace the initial surface passivation ligands, that is, trioctylphosphine oxide (TOPO) and trioctylphosphine (TOP), and the optical properties of the surface-modified QDs were studied. The thiol ligand molecules in this study included 1,4-benzenedimethanethiol, 1,16-hexadecanedithiol, 1,11-undecanedithiol, biphenyl-4,4′-dithiol, 11-mercapto-1-undecanol, and 1,8-octanedithiol. After the thiol functionalization, the CdSe/ZnS QDs exhibited significantly enhanced PL efficiency and storage stability. Besides surface passivation effect, such enhanced performance of thiol-functionalized QDs could be due to cross-linked assembly formation of dimer/trimer clusters, in which QDs are linked by dithiol molecules. Furthermore, effects of ligand concentration, type of ligand, and heating on the thiol stabilization of QDs were also discussed.

IR-active vibrational modes of CdTe and CdSe colloidal quantum dots and CdTe/CdSe core/shell nanoparticles and coupling effects

2007 ◽  
Vol 49 (3) ◽  
pp. 547-551 ◽  
Author(s):  
R. B. Vasiliev ◽  
V. S. Vinogradov ◽  
S. G. Dorofeev ◽  
S. P. Kozyrev ◽  
I. V. Kucherenko ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Vibrational Modes ◽  
Coupling Effects ◽  
Cdse Core ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Surface Organic Ligands-Passivated Quantum Dots: Toward High-Performance Light-Emitting Diodes with Long Lifetime

2021 ◽  
Author(s):  
Lishuang Wang ◽  
Ying Lv ◽  
Jie Lin ◽  
Jialong Zhao ◽  
Xingyuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Ligands ◽  
Colloidal Quantum Dots ◽  
Core Shell ◽  
Light Emitting ◽  
Long Lifetime

For quantum dots light-emitting diodes (QLEDs), typical colloidal quantum dots (QDs) are usually composed of a core/shell heterostructure which is covered with organic ligands as surface passivated materials to confine...

Fluorescence decay kinetics in phycobilisomes isolated from the bluegreen alga Synechococcus 6301

1984 ◽  
Vol 766 (2) ◽  
pp. 269-276 ◽  
Author(s):  
Georg W. Suter ◽  
Paola Mazzola ◽  
Joachim Wendler ◽  
Alfred R. Holzwarth
Keyword(s):  
Fluorescence Decay ◽  
Decay Kinetics ◽  
Synechococcus 6301 ◽  
Fluorescence Decay Kinetics

Balancing Electron Transfer and Surface Passivation in Gradient CdSe/ZnS Core–Shell Quantum Dots Attached to ZnO

2013 ◽  
Vol 4 (11) ◽  
pp. 1760-1765 ◽  
Author(s):  
Mohamed Abdellah ◽  
Karel Žídek ◽  
Kaibo Zheng ◽  
Pavel Chábera ◽  
Maria E. Messing ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Surface Passivation ◽  
Core Shell
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