Phosphine-free synthesis of CdSe nanocrystals

Jacek Jasieniak, Craig Bullen, Joel Van Embden, Paul Mulvaney

Research output: Contribution to journalArticleResearchpeer-review

215 Citations (Scopus)

Abstract

High quality CdSe nanocrystals have been prepared using elemental selenium as the chalcogenide precursor dispersed in 1-octadecene (ODE). The conditions used to prepare the Se precursor were found to be critical for successful nanocrystal synthesis. Systematic titration of the Se precursor solution with tri-n-octylphosphine (TOP) allowed the Se reactivity to be tuned and the final particle size to be controlled. Band-edge and surface related emission were observed for samples prepared in the presence and absence of added TOP. In the absence of a selenium passivant, the crystal structure of CdSe nanocrystals could be altered from zinc blende to wurtzite by the addition of bis(2,2,4-trimethylpentyl)phosphinic acid (TMPPA).

Original languageEnglish
Pages (from-to)20665-20668
Number of pages4
JournalJournal of Physical Chemistry B
Volume109
Issue number44
DOIs
Publication statusPublished - 10 Nov 2005
Externally publishedYes

Cite this