Precursor ink for producing IB-IIIA-VIA semiconductors
First Claim
1. A precursor ink for printing semiconductor photovoltaic cells comprising:
- a plurality of particulates of one or more metal compounds selected from IB, IIB and IIIAa liquid chalcogen solutiona functional solution
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Abstract
Copper indium diselenide, copper indium gallium diselenide, and other IB-IIIA-VIA compounds are produced by the liquid deposition on a substrate of a precursor-containing ink, followed by heating to produce the desired material. The precursor containing ink is a mixture of three parts. The first part is plurality of particulates of metal compounds of IB, IIIA. The second part is chalcogen source of selenium, sulfur, or organic chalcogen compounds dissolved in a liquid organic solvent. The third part solution function as viscosity adjustment, as introduction of dopant of sodium ion and/or as ink stabilizer. The precursor ink can be coated on substrate at room temperature and it can be transferred into copper indium (gallium) chalcogenide semiconductor thin film upon baking and a chalcogenization process. The resulting thin film semiconducting material can be incorporated into photovoltaic and other electronic devices.
109 Citations
13 Claims
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1. A precursor ink for printing semiconductor photovoltaic cells comprising:
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a plurality of particulates of one or more metal compounds selected from IB, IIB and IIIA a liquid chalcogen solution a functional solution - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13)
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10. A method for making a semiconductor film with the general formula Cu(InaGabAlc)SeyS2-y, where 0.7<
- a+b+c<
1.3 and 0≦
y≦
2, by the following steps;a) Selenium, sulfur or both are dissolved in a liquid organic solvent. The chemical composition of this liquid organic solvent includes one or more of the elements phosphorus, sulfur and oxygen. b) The liquid organic solvent produced in step a) is mixed with a plurality of particulates of metal sources or metal compounds selected from IB, IIB and IIIA. c) Formulation a precursor ink by mixing a) and b) and a functional solution for adjusting viscosity, increasing ink stability and containing sodium ion to promoting CIGS crystal growth. d) Apply the precursor ink c) on substrate and followed with a baking process under elevated temperature at vacuum. e) Chalcogenize the baked film of d) at atmosphere of chalcogen vapor and/or at atmosphere of hydrogen chalcogenide to cause some of the components of the ink produced in step c) and deposited on a substrate in step d) to react and creating the desired polycrystalline semiconductor film.
- a+b+c<
Specification