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US 7,611,573 B2Granted
ZnS/Zn(O,OH)S-based buffer layer deposition for solar cells
AssigneeAlliance for Sustainable Energy, LLC
InventorRaghu N. Bhattacharya
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Abstract
The invention provides CBD ZnS/Zn(O,OH)S and spray deposited ZnS/Zn(O,OH)S buffer layers prepared from a solution of zinc salt, thiourea and ammonium hydroxide dissolved in a non-aqueous/aqueous solvent mixture or in 100% non-aqueous solvent. Non-aqueous solvents useful in the invention include methanol, isopropanol and triethyl-amine. One-step deposition procedures are described for CIS, CIGS and other solar cell devices.
Claims20
A composition for deposition of a ZnS/Zn(O,OH)S film on a substrate comprising:
- a zinc salt;
- a source of sulfur;
- an amine;
- and
- a solvent comprising at least a portion of a non-aqueous material;
- wherein the composition is deposited by a deposition process onto the substrate.
3 more elements
A method for depositing a ZnS/Zn(O,OH)S film on a substrate comprising:
- combining a zinc salt, an amine, and a sulfur source in a solvent comprising at least a potion of an organic material wherein the resultant solution is contacted to the substrate to fabricate a ZnS/Zn(O,OH)S film on the substrate.
Dependencies are inferred from the claim text.