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research article
Synthesis of high quality zinc blende CdSe nanocrystals
Highly homogeneous and luminescent CdSe colloidal nanocrystals in the less common zinc blende crystal structure have been obtained at high temperature in a noncoordinating organic solvent. The key parameter appears to be the addition of a phosphonic acid to the trioctylphosphine-selenium complex before its injection into the hot cadmium mixture, while the role of temperature is less relevant. Compared to standard (wurtzite) colloidal CdSe preparations, we find that the growth rate is considerably reduced, and the energy gap between the first two absorption bands becomes larger.
Type
research article
Authors
Publication date
2005
Published in
Volume
109
Start page
10533
End page
10537
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
April 12, 2011
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