Platinum complex, OLED and apparatus for providing visible emission or near-infrared emission

Patent metadata

Field	Value
Publication number	US-10640525-B2
Application number	US-201715411447-A
Country	US
Kind code	B2
Filing date	Jan 20, 2017
Priority date	Dec 7, 2016
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A platinum complex, an OLED and an apparatus for providing visible emission or near-infrared (NIR) emission using the same are described. The platinum complex has a structure represented by formula (I):

wherein A1 to A4 each independently represent a 5-membered or 6-membered unsaturated ring, a first chelating ligand including A1 and A4 fragments has a minus one formal charge, and a second chelating ligand including A2 and A3 fragments has a minus one formal charge.

First claim

What is claimed is:

1. A platinum complex, having a structure represented by formula (I):

wherein
A1 to A4 each independently represent a 5-membered or 6-membered unsaturated ring;
X is carbon or nitrogen; and
a first chelating ligand comprising A1 and A4 has a minus one formal charge, and a second chelating ligand comprising A2 and A3 has a minus one formal charge.

2. The platinum complex of claim 1 , having a structure represented by formula (I-1):

wherein a hydrogen bond exists between the first chelating ligand and the second chelating ligand.

3. The platinum complex of claim 1 , having a structure represented by formula (IA):

wherein
X 1 to X 9 each independently represent carbon or nitrogen;
R 1 and R 2 each independently represent substituted or unsubstituted C 1 -C 6 alkyl,
—CF 2 H, —CFH 2 , substituted or unsubstituted C 6 -C 12 aryl or C m F 2m+1 , m is an integer of 0 to 5;
R 3 and R 4 each independently represent hydrogen, substituted or unsubstituted C 1 -C 12 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy, substituted or unsubstituted C 1 -C 6 carboxylate, substituted or unsubstituted C 6 -C 12 aryl or —C n F 2n+1 , and n is an integer of 0 to 3;
p and q each independently represent an integer of 0 to 3;
when X 9 is carbon, R 5 can be hydrogen, fluoride, chloride or cyano;
when p is equal to or greater than 2, two or more R 3 's may join to form a C 3 -C 8 aromatic ring; and
when q is equal to or greater than 2, two or more R 4 's may join to form a C 3 -C 8 aromatic ring.

4. The platinum complex of claim 3 , wherein R 1 comprises —C 6 F 2n+1 , and n is an integer of 0 to 3.

5. The platinum complex of claim 3 , having a structure represented by one of formula (IA-1) to formula (IA-22):

6. The platinum complex of claim 1 , having a structure represented by formula (IB):

wherein
X 1 to X 10 each independently represent carbon or nitrogen;
R 1 and R 2 each independently represent substituted or unsubstituted C 1 -C 6 alkyl, —CF 2 H, —CFH 2 , substituted or unsubstituted C 6 -C 12 aryl or —C m F 2m+1 , and m is an integer of 0 to 5;
R 3 and R 4 each independently represent hydrogen, substituted or unsubstituted C 1 -C 12 alkyl, substituted or unsubstituted C 1 -C 6 alkoxy, substituted or unsubstituted C 1 -C 6 carboxylate, substituted or unsubstituted C 6 -C 12 aryl or —C n F 2n+1 , n is an integer of 0 to 3;
p and q each independently represent an integer of 0 to 3;
when p is equal to or greater than 2, two or more R 3 's may join to form a C 3 -C 8 aromatic ring; and
when q is equal to or greater than 2, two or more R 4 's may join to form a C 3 -C 8 aromatic ring.

7. The platinum complex of claim 6 , having a structure represented by one of formula (IB-1) to formula (IB-4):

8. The platinum complex of claim 1 , having an emission wavelength of 450 nm to 1,200 nm.

9. An apparatus emitting visible light or near-infrared light, comprising the platinum complex of claim 1 .

10. An organic light-emitting diode, comprising two electrodes and a light-emitting layer disposed between the two electrodes, wherein the light-emitting layer contains the platinum complex of claim 1 .

Assignees

• Univ Nat Tsing Hua

Inventors

• Chi Yun
• Palanisamy Rajakannu
• Nandakumar Meganathan

Classifications

• C09K11/06

  containing organic luminescent materials · CPC title

• C07F15/0086 Primary

  Platinum compounds · CPC title

• C09K2211/185

  of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd · CPC title

• H01L51/0087

  Electricity · mapped topic

• H01L51/5088

  Electricity · mapped topic