REACTION PATHWAY INSIGHTS INTO THE SOLVOTHERMAL PREPARATION OF Culn1- xGaxSe2 NANOCRYSTALLINE MATERIALS
نویسندگان
چکیده
Reaction pathway investigations of the solvothermal preparation of nanocrystalline Culn1xGa xSe2 in triethylenetetramine reveal the early formation of a previously unreported CU2-xSe(S) intermediate. Over 24 hours, this reacts with In and Se species to form CulnSe2(s). If Ga is present, the reaction proceeds over an additional 48 hours to form Culn1xGa xSe2. Adding ammonium halide salts reduces the CulnSe2 formation time to as little as 30 minutes. It is proposed that in these cases, CU2-xSe particle growth is limited via a competitive Cu-halide complex formation. The smaller CU2-xSe particles may react and form CulnSe2 more rapidly. A reaction pathway scheme consistent with experimental results and previous literature reports is proposed.
منابع مشابه
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