METHOD OF PREPARING LUMINESCENT NANOCRYSTALS, THE RESULTING NANOCRYSTALS AND USES THEREOF

摘要

The present invention comprises a method for preparing a nanocrystal having (i) a core comprising a semiconductor comprising A representing a metal or metalloid in the +III oxidation state and B representing an element in the −III oxidation state, coated with (ii) a shell in which the outer portion comprises a semiconductor having the formula ZnS_1-xE_x, where E represents an element in the −II oxidation state and x is a decimal number such that 0≦x1, said method comprising a step consisting of heating a mixture of at least one precursor of A, at least one precursor of B, at least one precursor of zinc, at least one precursor of sulphur and, optionally, at least one precursor of E, from a temperature T₁ to a temperature T₂ greater than T₁ in an increasing manner and so as to form, firstly, said core then said shell. The present invention also concerns a nanocrystal obtainable by the invention method and uses thereof.