TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The group IB element is copper. The group IIB element is zinc. The group IVA element is silicon, germanium or tin. The group VIA element is selenium or sulfur. The inert gas is nitrogen, helium or neon.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The reflux temperature is 180-300 degrees C. Preferred Components: The monoamine compounds are selected from alkyl polyalkylene glycol amines, bis(methyl triethylene glycol)amine, butyl triethylene glycol amine, lauryl polypropylene glycol amine, methyl tripropylene glycol amine, phenol polypropylene glycol amine, polypropylene glycol amine, bis(methyl tripropylene glycol)amine, N-methyl methyl propylene glycol amine, methyl polypropylene glycol amine, bis(methyl polypropylene glycol)amine, tris(methyl diglycol)amine, methyl polyalkylene glycol amine with random or blockwise distribution of the ethylene glycol, and propylene glycol units. The diamine compounds are selected from triethylene glycol diamine, tripropylene glycol diamine, polyethylene glycol diamine, polypropylene glycol diamine, polyalkylene glycol diamine with random or blockwise distribution of ethylene glycol and propylene glycol units, butanediol polyalkylene glycol diamine, and resorcinol polyalkylene glycol diamine. The triamine compounds are selected from glycerol polyalkylene glycol triamine with random or blockwise distribution of the ethylene glycol and propylene glycol unit, bis(triethylene glycol amine)amine, and bis(polyalkylene glycol amine)amines. EXAMPLE - A glass reactor was prepared with a magnetic stirrer under the atmosphere of nitrogen (N2) for 30 minutes. A mixture of copper metal powders (28 g), zinc powders (14.2 g), tin (26 g) and selenium powders (70 g) (all the elements are in 99.99% purity) was added into the glass reactor, then a JEFFAMINE D-400 (RTM: polyetheramine) (300 g), with difunctional, primary amine with an average molecular weight of 400, was added into the reactor. The polyetheramine and the mixture were mixed completely for 2-3 hours to remove the inherent oxygen and water vapor. The mixed polyetheramine and the elements, including copper, zinc, tin and selenium, were heated to reflux at 220-250 degrees C for 50 hours. Then the reactor was cooled down to the room temperature and black liquid products of copper zinc tin selenide (Cu2ZnSnSe4, CZTSe) were generated. All the collected black liquid products (10 g) were stirred with ethanol (200 g) for 2 hours and then transferred into a filter paper. The leach was washed with pure water (200 ml) and ethanol (200 ml) and then dried at 40 degrees C under a vacuum of 0.1 torr for 10 hours to obtain the final product, CZTSe black powder (3 g). The CZTSe black powder formed was identified through an X-ray diffraction (XRD) experiment. The average particle size of the black powder products was about smaller than 10 nm.