Synthesis of CdSe colloidal quantum dots and quantum transinions under action of low power optical excitation

Abstract

CdSe colloidal quantum dots were synthesized at low temperature (80-85 0C) on the basis of chemical reactions in colloiodal solutions using tryoctilphosphine (TOP), pure Se, oleic acid and cadmium acetate Cd(CH3COO)2. The average size of the synthesized nanocrystals is 2.04 nm, that is less then exciton Bohr radius in the bulk material, which is equal to 5.6 nm. Therefore in such QDs the electron with spin 1/2 and the hole with total angular momentum 3/2 are in localized or slightly delocalized states.