Methods for making perovskite solar cells having improved hole-transport layers
AssigneeAlliance for Sustainable Energy, LLC
InventorsKai Zhu, Zhen Li, Alan Sellinger, Jonathan Scott Tinkham
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Abstract
An aspect of the present disclosure is a device that includes a first layer that includes a hole-transport material and an acid, where the first layer has a conductivity between 20 μS/cm and 500 μS/cm. In some embodiments of the present disclosure, the first layer may absorb light having a wavelength between 400 nm and 600 nm. In some embodiments of the present disclosure, the hole-transport material may include at least one of 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD), a derivative of spiro-OMeTAD, poly(triarylamine), poly(3-hexylthiophene), and/or N,N′-bis(3-methylphenyl)-N,N′-diphenylbenzidine.
Claims22
A device comprising:
- a first layer comprising a hole-transport material and an acid, wherein:
- the first layer has a conductivity between 20 μS/cm and 500 μS/cm.
A method comprising:
- mixing a hole-transport material, a dopant, an acid, and a solvent to form a solution;
- separating the solution into a liquid and a solid;
- applying the liquid to a surface of a perovskite layer to form a liquid layer on the surface;
- and
- removing at least a portion of the solvent to transform the liquid layer to a solid layer comprising the hole-transport material, the dopant, and the acid, wherein:
- the liquid is substantially free of the solid,
- the solid is substantially free of the liquid, and
- the solid layer has a conductivity between 100 μS/cm and 500 μS/cm.
Dependencies are inferred from the claim text.