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.


Published in:
Journal of Physical Chemistry, 109, 10533-10537
Year:
2005
ISSN:
0022-3654
Keywords:
Laboratories:




 Record created 2011-04-12, last modified 2018-03-17


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