US 11,856,809 B2 · Method of screening for electron transport material and hole blocking material used in organic light emitting device

Abstract

A method of screening for an electron transport material included in an electron transport layer of an organic light emitting device and a method of screening for a hole blocking material included in a hole blocking layer of the organic light emitting device, the method using a heterogeneous electron transfer rate constant (K) value to select the electron transport material and an electron donating rate constant kd to select the hole blocking material, thereby capable of realizing the organic light emitting device having an excellent balance between luminous efficiency and lifetime.

Claims7

Dependent claims

A method of screening for an electron transport material included in an electron transport layer of an organic light emitting device, the method comprising the steps of:

1) calculating heterogeneous electron transfer rate constant (K) of electron transport material candidates by the following Mathematical equation 1;
and
2) determining an electron transport material candidate of which the heterogeneous electron transfer rate constant (K) value calculated by the following Mathematical equation 1 is 1.2 to 1.65 as the electron transport material of the organic light emitting device,
K
=
k
d
+
k
a
2
[
Mathematical
⁢
equation
⁢
1
]
in Mathematical equation 1,
kd represents an electron donating rate constant and ka represents an electron accepting rate constant.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/274,012Filed 31 Jan 2020

Priority

KR 10-2019-00134421 Feb 2019

Published

US 2021/0320255 A114 Oct 2021

Granted

26 Dec 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

H10K 85/626
Polycyclic condensed aromatic hydrocarbons, e.g. anthracene: containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
H10K 50/16
Carrier transporting layers: electron transporting layers
H10K 71/70
Manufacture or treatment specially adapted for the organic devices covered by this subclass: testing, e.g. accelerated lifetime tests
H10K 85/633
Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine: comprising polycyclic condensed aromatic…

Method of screening for electron transport material and hole blocking material used in organic light emitting device

Life of this patent

Method of screening for electron transport material and hole blocking material used in organic light emitting device

Life of this patent

Abstract

Claims7