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US 12,604,656 B2Granted
Large-area perovskite layer and preparation method therefor
AssigneeTrina Solar Co., Ltd.
InventorsRui Xia, Yiqi Chen, Yao Wang, Yang Zou, Chengfa Liu, Xueling Zhang, Daming Chen, Yifeng Chen
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Abstract
The present application provides a large-area perovskite layer and a preparation method thereof. The preparation method includes: dissolving raw materials of a perovskite in an ionic liquid or in a mixture of the ionic liquid and an organic solvent, thereby forming a perovskite precursor, and coating the perovskite precursor onto a surface of a crystalline silicon bottom cell, thereby forming the perovskite layer.
Claims14
A method for preparing a large-area perovskite layer, the method comprising:
- dissolving raw materials of a perovskite in a mixture of an ionic liquid and an organic solvent, thereby forming a perovskite precursor;
- and
- coating the perovskite precursor onto a surface of a substrate at a speed of about 0.01 m/s to about 1 m/s, and then spin coating to process remaining solvent in the perovskite precursor on the surface of the substrate, thereby forming the perovskite layer on the substrate,
- wherein a volume ratio of the organic solvent to the ionic liquid is in a range of about 0.25:1 to about 100:1, and
- the ionic liquid is selected from the group consisting of 1,1,1-trifluoroethyl ammonium iodide, methylamine formate, methylammonium difluoroacetate, 1-butyl-3-methylimidazolium tetrafluoroborate, or a combination thereof.
2 more elements
Dependencies are inferred from the claim text.