METHOD FOR PRODUCTION OF MONOGRAIN KESTERITE POWDERS Russian patent published in 2019 - IPC H01L31/18 C01G1/12 C01B17/20 C01B19/00 C01G3/12 C01G9/08 C01G19/00 C30B29/46 B22F9/16 

FIELD: physics; chemistry.

SUBSTANCE: invention can be used in making thin-film solar panels. For production of monograin kesterite powders there used are precursor mixtures consisting of Cu₂Se, CuSe, ZnS and SnSe₂. Said chalcogenides are taken in required amounts, ground with CsI in agate mortar and sealed in quartz ampoules in vacuum at molar ratio of synthesized kesterite to CsI more than 1:5. Ampules are held at 740–750 °C for 100 hours, after which it is opened. Content of ampoules is washed with deionised water to remove CsI and dried under vacuum. Monograin fraction is separated using sieves.

EFFECT: invention enables to obtain monograin kesterite powders of composition Cu_{1_5}Zn_{1_1}Sn_{0_9}Se_{2_9}S_{1_1} for creation of highly efficient ecologically clean solar batteries.

1 cl, 5 dwg, 1 ex