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

Photoinduced electron transfer from quantum dots to TiO2: elucidating the involvement of excitonic and surface states

2016 ◽  
Vol 18 (30) ◽  
pp. 20466-20475 ◽  
Author(s):  
Saurabh Chauhan ◽  
David F. Watson
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Surface States ◽  
Band Edge ◽  
Core Shell ◽  
Edge States ◽  
Cdse Qds

CdSe QDs transfer electrons from band-edge and surface states to TiO2; core/shell CdSe/ZnS QDs transfer electrons exclusively from band-edge states.

Characterization of Shell Material on Colloidal CdSe/ZnS Quantum Dots

2004 ◽  
Vol 818 ◽  
Author(s):  
Zhiheng Yu ◽  
Li Guo ◽  
Hui Du ◽  
Todd Krauss ◽  
John Silcox
Keyword(s):  
Quantum Dots ◽  
Surface Passivation ◽  
Core Shell ◽  
Shell Material ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Chemical Distribution ◽  
Electron Energy Loss

AbstractScanning transmission electron microscopy (STEM) coupled with electron energy loss spectroscopy (EELS) was used to determine the distribution of ZnS shell material on colloidal core-shell CdSe/ZnS quantum dots (QDs). A sub-nm electron probe was placed at various locations on core-shell QDs to ascertain the chemical distribution of the shell material. While a definite shell of ZnS was detected surrounding the CdSe core, the integrated EELS signals from positions around the QD suggest the distribution of the shell material may not be uniform. A non-uniform shell implies a reduced quality of the QD surface passivation.

Carrier relaxation dynamics in type-II ZnO/CdSe quantum dot heterostructures

2017 ◽  
Vol 19 (36) ◽  
pp. 24896-24902
Author(s):  
Sandeep Verma ◽  
Hirendra N. Ghosh
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Core Shell ◽  
Type Ii ◽  
Hot Electron ◽  
Relaxation Dynamics ◽  
Carrier Relaxation ◽  
Cdse Quantum Dot ◽  
Hot Electron Transfer ◽  
Carrier Relaxation Dynamics

Hot electron transfer from CdSe to ZnO in core/shell quantum dots before the onset of carrier cooling in CdSe shell.

scholarly journals Controlling photoinduced electron transfer from PbS@CdS core@shell quantum dots to metal oxide nanostructured thin films

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 7004-7011 ◽  
Author(s):  
H. Zhao ◽  
Z. Fan ◽  
H. Liang ◽  
G. S. Selopal ◽  
B. A. Gonfa ◽  
...  
Keyword(s):  
Thin Films ◽  
Quantum Dots ◽  
Electron Transfer ◽  
Metal Oxide ◽  
Photoinduced Electron Transfer ◽  
Transfer Rate ◽  
Shell Thickness ◽  
Wide Bandgap ◽  
Core Shell ◽  
Photoluminescence Lifetime

We investigate the photoelectron transfer rate from PbS@CdS core@shell QDs to wide bandgap mesoporous films using photoluminescence lifetime spectroscopy, which is strongly size, shell thickness and oxide dependent.

Wave-Function Engineering of CdSe/CdS Core/Shell Quantum Dots for Enhanced Electron Transfer to a TiO2 Substrate

2010 ◽  
Vol 114 (35) ◽  
pp. 15184-15189 ◽  
Author(s):  
Zhijun Ning ◽  
Haining Tian ◽  
Haiyan Qin ◽  
Qiong Zhang ◽  
Hans Ågren ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Wave Function ◽  
Core Shell
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