Light emitting device and display unit

Patent metadata

Field	Value
Publication number	US-9263682-B2
Application number	US-201113195992-A
Country	US
Kind code	B2
Filing date	Aug 2, 2011
Priority date	Aug 6, 2010
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A light emitting device is configured to include a substrate and a luminous layer provided overlying the substrate, which includes a semiconductor nanocrystal to which a carbazole derivative is coordination-bonded or attached, the carbazole derivative having aromatic rings of a compound represented by the chemical structure 1, which is substituted by one to three substitution groups:

The one to three substitution groups are represented by the chemical structure 2:

-X-Y-Z  Chemical Structure 2.

X represents a methylene group, a carbonyloxy group, an oxycarbonyl group, a carbonyl group, an oxygen atom, and a sulfur atom, Y represents a substituted or non-substituted alkylene group, and Z represents a carboxyl group, a hydroxyl group, and a thiol group.

First claim

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. A light emitting device comprising:
a substrate; and
a luminous layer provided overlying the substrate and comprising a semiconductor nanocrystal to which a carbazole derivative is coordination-bonded or attached, the carbazole derivative having aromatic rings of a compound represented by the following chemical structure, which is substituted by one to three substitution groups:

where Ar 3 represents a substituted or non-substituted aryl group,
each of S1 and S2 may have substituents, and
the one to three substitution groups are represented by a chemical structure 2:
-X-Y-Z  Chemical Structure 2

where X is a methylene group, a carbonyloxy group, an oxycarbonyl group, a carbonyl group, an oxygen atom, or a sulfur atom, Y is a substituted or non-substituted alkylene group, and Z is a carboxyl group, a hydroxyl group, or a thiol group.

2. The light emitting device according to claim 1 , wherein Ar 3 is represented by the following chemical structure:
Ar 4 —X-Y-Z

where Ar 4 represents a substituted or non-substituted arylene group.

3. A display unit comprising the light emitting device of claim 1 .

4. The light emitting device according to claim 1 , wherein the carbazole derivative is represented by a chemical structure 8:

5. The light emitting device according to claim 1 , wherein the carbazole derivative is represented by a chemical structure 13:

6. The light emitting device according to claim 1 , wherein the carbazole derivative is represented by a chemical structure 14:

Assignees

• Harada Shigeyuki
• Sasaki Masaomi
• Abe Mikiko
• Ricoh Co Ltd

Inventors

• Harada Shigeyuki
• Sasaki Masaomi
• Abe Mikiko

Classifications

• H01L51/0035

  Electricity · mapped topic

• H05B33/14 Primary

  characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} · CPC title

• H01L51/0072 Primary

  Electricity · mapped topic

• H01L2251/308

  Electricity · mapped topic

• H01L51/0068

  Electricity · mapped topic