A method of making a colloidal solution of ternary AIAIIB nanocrystals, wherein AI and AII are independently selected from an element of periodic table subgroup IIB, when B represents an element of periodic table main group VI; or AI and AII are independently selected from an element from periodic table main group III, when B represents an element of periodic table main group V. The method providing a mixture of AI in a suitable form for the generation of a nanocrystal, and coordinating solvents including at least 30 wt % of fatty acids; heating the reaction mixture for a suitable time, adding B in a suitable form for the generation of a nanocrystal, adding AII in a suitable form for the generation of a nanocrystals; and heating the reaction mixture for a sufficient period of time at a temperature suitable for forming nanocrystal AIAIIB.