Luminescent metal halide perovskites and methods

Patent metadata

Field	Value
Publication number	US-9908906-B2
Application number	US-201615354558-A
Country	US
Kind code	B2
Filing date	Nov 17, 2016
Priority date	Dec 15, 2015
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

Nanoscale metal halide perovskites are provided. The nanoscale metal halide perovskites may have a 2D structure, a quasi-2D structure, or a 3D structure. Methods also are provided for making the nanoscale metal halide perovskites. The color emitted by the nanoscale metal halide perovskites may be tuned.

First claim

We claim:

1. A nanoscale metal halide perovskite crystal having a unit cell according to formula (I):
(RNH 3 )(R′NH 3 )(CH 3 NH 3 ) n−1 MnX 3n+1   (I);

wherein R is C 6 -C 20 hydrocarbyl;
R′ is C 6 -C 20 hydrocarbyl;
M is a metal selected from the group consisting of Pb, Sn, Cu, Ge, Mn, Co, Bi, and Eu;
X is a halide ion selected from the group consisting of Cl, Br, and I;
n is an integer equal to or greater than 1; and
R and R′ are different when n is equal to 1.

2. The nanoscale metal halide perovskite of claim 1 , wherein n is 1, and the crystal has a 2D structure.

3. The nanoscale metal halide perovskite of claim 1 , wherein n is 2 to 9, and the crystal has a quasi-2D structure.

4. The nanoscale metal halide perovskite of claim 1 , wherein n is an integer equal to or greater than 10, and the crystal has a 3D structure.

5. The nanoscale metal halide perovskite of claim 1 , wherein R and R′ are C 7 -C 18 hydrocarbyl.

6. The nanoscale metal halide perovskite of claim 5 , wherein R and R′ are independently selected from the group consisting of n-octadec-1-yl, n-oct-1-yl, and benzyl.

7. The nanoscale metal halide perovskite of claim 1 , wherein M is Pb, X is Br, n is 2 to 9, and the crystal has a quasi-2D structure.

8. The nanoscale metal halide perovskite of claim 1 , wherein n is greater than 1, and R and R′ are identical.

9. The nanoscale metal halide perovskite of claim 8 , wherein R and R′ are a monovalent n-oct-1-yl.

10. The nanoscale metal halide perovskite of claim 1 , wherein the crystal emits light at a wavelength of 403 nm (deep blue) to 530 nm (bright green).

11. The nanoscale metal halide perovskite of claim 1 , wherein the crystal has a PLQE of about 13% to about 45%.

Assignees

• Univ Florida State Res Found

Inventors

• Ma Biwu
• Yuan Zhao

Classifications

• C09K2211/188

  of other metals not provided for in one of the previous groups · CPC title

• H01L51/4226

  Electricity · mapped topic

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C07F7/24 Primary

  Lead compounds · CPC title

• H10K85/50

  Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3 · CPC title