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A new room-temperature, aqueous solution-based preparation method for chalcopyrite CuInSe2 has been developed. Using 10% aqueous ethylenediamine as a solvent, the slow addition of Cu(NO3)2 to a mixture of indium(III) acetate, elemental Se, and sodium thioglycolate results in the formation of CuInSe2 as characterized by Raman spectroscopy. During this reaction, a kinetically-stable Cu2-xSe(s) intermediate...
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