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US 2023/0157039 A1Published application
Narrow-bandgap perovskites using quasi-2d cation engineering
AssigneeAlliance for Sustainable Energy, LLC
InventorsKai ZHU, Jinhui TONG, Qi JIANG
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Abstract
The present disclosure relates to a composition that includes a perovskite phase having the stoichiometry ABX3 and a perovskite-like phase having the stoichiometry A′2A″B′2X′, where A is a first cation, B is a second cation, X is a first anion, A′ is a third cation, A″ is a fourth cation, B′ is a fifth cation, X′ is a second anion, and A′ is different than A″.
Claims20
A composition comprising:
- a perovskite phase comprising ABX3;
- and
- a perovskite-like phase comprising A′2A″B′2X′7, wherein:
- A is a first cation, B is a second cation, X is a first anion,
- A′ is a third cation, A″ is a fourth cation, B′ is a fifth cation, X′ is a second anion, and
- A′ is different than A″.
3 more elements
A tandem device comprising:
- a composite layer having a first bandgap and comprising a perovskite phase and perovskite-like phase;
- and
- a perovskite layer having a second bandgap, wherein:
- the first bandgap is less than the second bandgap.
1 more element
Dependencies are inferred from the claim text.