Directed assembly of layered heterostructures as single crystals
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsHemamala Indivari Karunadasa, Abraham Saldivar, Michael Aubrey
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Abstract
Layered or 2D halide perovskites form in solution through the templating effects of organoammnonium groups. The use of organic groups with two different functionalities allows for the formation of a perovskite/non-perovskite heterostructure in aqueous or organic solution. A first functional group templates the perovskite and a second functional group templates a new 2D or ID inorganic non-perovskite lattice between the perovskite sheets. The perovskite and the intergrowth may be separated from each other by organic molecules, or they may be in contact with each other (e.g., by sharing an atom).
Claims15
A method for self-assembling a layered heterostructure, the method comprising:
- providing at least one first inorganic material;
- providing a second inorganic material, which is the same or different from the first inorganic material;
- providing an organic molecule containing first and second different functional groups, wherein the first functional group is at a first end of the molecule and operates to template a first type of two-dimensionally extended inorganic layers, and wherein the second functional group is at a second end of the molecule and operates to template a second type of extended inorganic layers comprising either one-dimensionally extended inorganic layers or two-dimensionally extended inorganic layers;
- and
- combining in a solution the at least one first inorganic material, the second inorganic material, and the organic molecule containing the first and second different functional groups;
- wherein the layered heterostructure self-assembles in the solution;
- and
- wherein the organic molecule containing the first and second different functional groups directs the formation of the layered heterostructure in the solution, the first functional group of the organic molecule templating the first type of two-dimensionally extended inorganic layers of the heterostructure and the second functional group of the organic molecule templating the second type of extended inorganic layers comprising one-dimensionally extended inorganic layers of the heterostructure or two-dimensionally extended inorganic layers of the heterostructure, which are different in composition and/or connectivity from the first type of two-dimensionally extended inorganic layers of the heterostructure;
- and
- wherein the first type of two-dimensionally extended inorganic layers of the layered heterostructure comprise perovskite or double perovskite layers and the second type of one-dimensionally or two-dimensionally extended inorganic layers of the layered heterostructure comprise non-perovskite layers.
Dependencies are inferred from the claim text.