Organic-inorganic hybrid bulk assemblies and methods
Bulk assemblies are provided, which may have desirable photoluminescence quantum efficiencies. The bulk assemblies may include two or more metal halides, and a wide band gap organic network. The wide band gap organic network may include organic cations. The metal halides may be disposed in the wide band gap organic network. Light emitting composite materials also are provided.
1. A method of preparing a bulk assembly, the method comprising:
providing a precursor solution comprising—
(i) a solvent;
(ii) one or more compounds of formula M +y X y , wherein M is a metal selected from the group consisting of Sb, Pb, Sn, and Mn; X is Cl, Br, or I; and y is the charge of the metal; and
(iii) one or more organic salts; and
contacting the precursor solution with an anti-solvent to form the bulk assembly.
2. The method of claim 1 , wherein a molar ratio of the one or more compounds of formula M +y X y to the one or more organic salts in the precursor solution is about 1:1.5 to about 1:4.
3. The method of claim 1 , wherein a molar ratio of the one or more compounds of formula M +y X y to the one or more organic salts in the precursor solution is about 1:1.5 to about 1:2.5.
4. The method of claim 1 , wherein a molar ratio of the one or more compounds of formula M +y X y to the one or more organic salts in the precursor solution is about 1:2.
5. The method of claim 1 , wherein the solvent comprises dimethylformamide.
6. The method of claim 1 , wherein the anti-solvent comprises diethylether.
7. The method of claim 1 , wherein M is Sb.
8. The method of claim 1 , wherein the one or more compounds of formula M +y X y comprises antimony trichloride (SbCl 3 ).
9. The method of claim 1 , wherein the one or more compounds of formula M +y X y comprises tin(II) bromide or tin(II) iodide.
10. The method of claim 1 , wherein the one or more organic salts comprises a N,N′-dimethylethylene-1,2-diammonium halide salt.