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US 2020/0051752 A1Published application
Mixed organic-inorganic perovskite formulations
AssigneeOxford Photovoltaics Limited
InventorsNicola BEAUMONT, Brett Akira KAMINO, Benjamin LANGLEY, Edward James William CROSSLAND
Life of this patent
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Abstract
A formulation for use in the preferential formation of thin films of a perovskite material AMX3 with a certain required crystalline structure, wherein said formulation comprises two or more compounds which between them comprise one or more first organic cations A; one or more metal cations M; one or more second cations A′; one or more first anions X and one or more second anions X′.
Claims12
1-52. (canceled)
A method of producing a photovoltaic device comprising a photoactive material, which photoactive material comprises a perovskite of general formula (I):
- AMX3 (I)
- wherein A is one or more monovalent cations, M is one or more divalent metal cations, and X is one or more halide anions, the method comprising:
- forming a precursor solution by dissolving in a solvent system the formulation comprising two or more compounds which between them comprise:
- the one or more monovalent cations A;
- the one or more divalent metal cations M;
- the one or more halide anions X;
- one or more further monovalent cations A′;
- and
- one or more further halide anions X′;
- wherein the one or more further monovalent cations A′ and the one or more further halide anions X′ are selected to form one or more A′X′-containing compounds which are able to be fully separated from the AMX3 material at a temperature of less than 200° C.;
- disposing/depositing a layer of the precursor solution;
- and
- removing at a temperature of less than 200° C. the solvent system and the more volatile A′X′ compounds to produce a solid layer of the perovskite material.
10 more elements
Dependencies are inferred from the claim text.