METHOD AND PRECURSOR FOR LARGE SCALE SYNTHESIS, GROWTH AND MODIFICATION OF UPCONVERTING NANOCRYSTALS DERIVED FROM A NaYF4 HOST

摘要

A method and a precursor for the large-scale production of upconverting nanocrystals derived from a NaYF₄ host are provided. A rare earth based precursor is combined with a hydrophobic fluoride precursor, which is based upon a long-chain n-alkyl amine to form a reaction solution. The reaction solution is heated under an inert gas to temperatures above 300° C., whereby upconverting NaYF₄-based nanocrystals are nucleated and grown.