Perovskite quantum dot material

Patent metadata

Field	Value
Publication number	US-10731075-B2
Application number	US-202016824631-A
Country	US
Kind code	B2
Filing date	Mar 19, 2020
Priority date	Nov 4, 2014
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

Provided is a hybridized perovskite quantum dot material. The quantum dot material includes a kernel and surface ligands. The kernel is formed by R 1 NH 3 AB 3 or (R 2 NH 3 ) 2 AB 4 , where R 1 is methyl group, R 2 is an organic molecular group, A is at least one selected from Ge, Sn, Pb, Sb, Bi, Cu and Mn, B is at least one selected from Cl, Br and I, A and B form a coordination octahedral structure, and R 1 NH 3 or R 2 NH 3 is filled in gaps of the coordination octahedral structure. The surface ligand is an organic acid or organic amine. The quantum dot material has a high fluorescence quantum yield.

First claim

What is claimed is:

1. A hybridized perovskite quantum dot material, comprising:
a kernel, formed by R 1 NH 3 AB 3 or (R 2 NH 3 ) 2 AB 4 , wherein R 1 is a methyl group, R 2 is an organic molecular group, A is one or more selected from a group consisting of Ge, Sn, Pb, Sb, Bi, Cu and Mn, B is one or more selected from a group consisting of Cl, Br and I, A and B form a coordination octahedral structure, and R 1 NH 3 or R 2 NH 3 is filled in gaps of the coordination octahedral structure; and
a surface ligand formed on a surface of the kernel and the surface ligand being an organic acid or organic amine.

2. The hybridized perovskite quantum dot material according to claim 1 , wherein the surface ligand is divergent, wrapping out of the surface of the kernel.

3. The hybridized perovskite quantum dot material according to claim 1 , wherein R 2 is a long-chain organic molecular group.

4. The hybridized perovskite quantum dot material according to claim 1 , wherein the surface ligand is an organic acid or a long-chain organic amine.

5. The hybridized perovskite quantum dot material according to claim 4 , wherein the organic acid comprises a saturated or an unsaturated alkyl acid with at least three carbon atoms.

6. The hybridized perovskite quantum dot material according to claim 4 , wherein a molecular formula of the long-chain organic amine is RNH 2 , and R is a saturated linear or branched alkyl group, or an unsaturated linear or a branched alkyl group.

7. The hybridized perovskite quantum dot material according to claim 4 , wherein the long-chain organic amine is an alkyl or aryl amine with from 4 to 24 carbon atoms.

8. A hybridized perovskite quantum dot material, comprising:
a kernel, formed by R 1 NH 3 AB 3 or (R 2 NH 3 ) 2 AB 4 , wherein A and B form a coordination octahedral structure, R 1 NH 3 or R 2 NH 3 is filled in gaps of the coordination octahedral structure, R 1 is methyl, R 2 is a long-chain organic molecular group, A is one or more selected from a group consisting of Ge, Sn, Pb, Sb, Bi, Cu and Mn, and B is one or more selected from a group consisting of Cl, Br and I; and
a surface ligand that is divergent, wrapping out of the surface of the kernel, and wherein the surface ligand is an organic acid or a long-chain organic amine.

9. The hybridized perovskite quantum dot material according to claim 8 , wherein the organic acid is a saturated alkyl acid that its formula is C n H 2n+1 COOH (n≥2), or an unsaturated alkyl acid that its formula is C n H 2n−1 COOH (n≥2).

10. The hybridized perovskite quantum dot material according to claim 8 , wherein a molecular formula of the long-chain organic amine is RNH 2 , and R is a saturated linear or a branched alkyl group, or an unsaturated linear or a branched alkyl group.

11. The hybridized perovskite quantum dot material according to claim 8 , wherein the long-chain organic amine is an alkyl or aryl amine with from 4 to 24 carbon atoms.

Assignees

• Shenzhen Tcl New Tech Co Ltd

Inventors

• Zhong Haizheng
• Zhang Feng
• Wu Xiangang
• Huang Hailong
• Niu Yuwei

Classifications

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• H10K85/50

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

• C09K11/025 Primary

  non-luminescent particle coatings or suspension media · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• H10K50/115

  comprising active inorganic nanostructures, e.g. luminescent quantum dots · CPC title