Liquid precursor inks for deposition of In—Se, Ga—Se and In—Ga—Se
An ink includes a solution of selenium in ethylene diamine solvent and a solution of at least one metal salt selected from the group consisting of an indium salt or a gallium salt in at least one solvent including an organic amide. The organic amide can include dimethylformamide. The organic amide can include N-methylpyrrolidone.
1. A method for preparing a gallium selenide ink, the method comprising:
mixing a first hydrazine-free and lithium-free solution comprising elemental selenium and ethylene diamine with a second solution comprising a gallium salt and a solvent comprising at least one of an organic amide or N-methylpyrrolidone.
2. The method of claim 1 , wherein the solvent consists of at least one of a formamide, an acetamide, a benzamide, or N-methylpyrrolidone.
3. The method of claim 2 , wherein the solvent consists of at least one of dimethylformamide or N-methylpyrrolidone.
4. The method of claim 1 , wherein the gallium salt includes a nitrate salt.
5. The method of claim 1 , wherein the gallium salt includes a chloride salt.
6. A method of forming a solid precursor on a substrate, the method comprising:
applying to a surface of the substrate an ink comprising a first hydrazine-free and lithium-free solution of elemental selenium in ethylene diamine mixed with a second solution comprising a gallium salt and a solvent comprising at least one of an organic amide or N-methylpyrrolidone; and
subjecting the ink and the substrate to a heating regime for a time sufficient to solidify the ink on the substrate in the form of the solid precursor.
7. The method of claim 6 , wherein the solvent consists of at least one of a formamide, an acetamide, a benzamide, or N-methylpyrrolidone.
8. The method of claim 7 , wherein the solvent consists of at least one of dimethylformamide or N-methylpyrrolidone.
9. The method of claim 6 , wherein the gallium salt includes a nitrate salt.
10. The method of claim 6 , wherein the gallium salt includes a chloride salt.
11. An ink comprising a solution of elemental selenium in ethylene diamine, a gallium salt, and a solvent comprising at least one of an organic amide or N-methylpyrrolidone.
12. The ink of claim 11 , wherein the solvent consists of at least one of a formamide, an acetamide, a benzamide, or N-methylpyrrolidone.
13. The ink of claim 12 , wherein the solvent consists of at least one of dimethylformamide or N-methylpyrrolidone.
14. The ink of claim 11 , wherein the gallium salt includes a nitrate salt.
15. The ink of claim 11 , wherein the gallium salt includes a chloride salt.