PROCESS FOR MANUFACTURING COLLOIDAL MATERIALS, COLLOIDAL MATERIALS AND THEIR USES

摘要

The present invention relates to a process for manufacturing a colloidal material, to colloidal materials obtainable by this process and to uses of said colloidal material for the manufacture of optic devices. The colloidal material obtainable by the process of the present invention is of formula An Xm, wherein A is an element selected from groups II, III or IV of the periodic table, wherein X is a metal selected from groups V or VI of the periodic table, and wherein, in the selection of the pair (A, X), the groups of the periodic table of A and X, respectively, are selected from the following combinations : (group II, group VI), (group III, group V) or (group IV, group VI); and wherein n and m are such that An Xm is a neutral compound. For example, the colloidal compound obtainable by the process of the present invention may be CdS, In P, or PbS. Other examples are provided below. The process of the present invention comprises a step of solution phase decomposition of a mixture of X and a carboxylate of formula A(R-COO)p in the presence of a non- or weakly-coordinating solvent, and a step of injecting an acetate salt or acetic acid in the mixture; wherein p is an integer between 1 and 2; R is a linear or branched C1-30alkyl group. The colloidal material of the present inveniton may be used for example for the manufacture of a laser or an optoelectronic device.