US 9,853,217 B2 · Charge-transporting varnish

Abstract

A charge-transporting varnish which contains a charge-transporting substance containing fluorine atoms, a charge-transporting substance containing no fluorine atoms, a dopant substance composed of a heteropolyacid, and an organic solvent. The charge-transporting substance containing fluorine atoms is a polymer which is obtained by condensing a triaryl amine compound, an arylaldehyde compound containing fluorine atoms, a fluorene derivative having a carbonyl group and a carbazole derivative having an alkyl group or an alkyl group containing an ether structure in the N-position, and which has a weight average molecular weight of 1,000-200,000. The charge-transporting substance containing no fluorine atoms is an oligoaniline compound. A thin film formed from this charge-transporting varnish is capable of providing an organic EL element having excellent luminance characteristics and durability even in cases where the thin film is used as a single layer between a positive electrode and a light emitting layer in such a manner that the thin film is in contact with the positive electrode and the light emitting layer.

Claims15

Dependent claims

A charge-transporting varnish comprising:

a charge-transporting substance containing a fluorine atom;
a charge-transporting substance containing no fluorine atom;
a dopant substance of heteropolyacid;
and
an organic solvent,
wherein said charge-transporting substance containing the fluorine atom is a polymer having a weight-average molecular weight of 1,000 to 200,000 which is obtained by condensation from a triarylamine compound, arylaldehyde compound containing a fluorine atom, fluorene derivative having a carbonyl group, and carbazole derivative having at the N-position an alkyl group or an alkyl group having an ether structure,
said charge-transporting substance containing no fluorine atom is an oligoaniline compound.

4 more elements

A polymer having a weight-average molecular weight of 1,000 to 200,000 which is obtained by condensation from a triarylamine compound represented by Formula (1), a fluorine atom-containing arylaldehyde compound represented by Formula (2), a fluorene derivative having a carbonyl group represented by Formula (3) or (4), and a carbazole derivative represented by Formula (5):

wherein Ar1 to Ar3 mutually independently represent an aryl group having 6 to 20 carbon atoms with an optional substituent Z1, each aryl group being composed of carbon atoms at least one of which has no substituent;
Ar4 represents an aryl group having 6 to 20 carbon atoms with at least one substituent Z3 and an optional substituent Z4;
R1 to R8 mutually independently represent a hydrogen atom, halogen atom, nitro group or cyano group or an alkyl group having 1 to 20 carbon atoms, alkenyl group having 2 to 20 carbon atoms, or alkynyl group having 2 to 20 carbon atoms, each having an optional substituent Z2;
R9 and R10 mutually independently represent a hydrogen atom and an alkyl group having 1 to 20 carbon atoms, (poly)ethyleneoxide group having 2 to 20 carbon atoms, alkenyl group having 2 to 20 carbon atoms, or alkynyl group having 2 to 20 carbon atoms, each having an optional substituent Z2 or alkyl group having 1 to 20 carbon atoms, a substituent of ethenyl group or ethynyl group and an optional substituent Z2;
R11 represents an alkyl group having 1 to 20 carbon atoms or alkyl group having 2 to 20 carbon atoms and an ether structure, both having an optional substituent Z2;
Z1 represents a halogen atom, nitro group, cyano group, or an alkyl group having 1 to 20 carbon atoms, alkenyl group having 2 to 20 carbon atoms, or alkynyl group having 2 to 20 carbon atoms, each having an optional substituent Z2;
Z2 represents a halogen atom, nitro group, or cyano group;
Z3 represents a fluorine atom, fluorinated alkyl group having 1 to 20 carbon atoms, or fluorinated aryl group having 6 to 20 carbon atoms;
Z4 represents a chlorine atom, bromine atom, iodine atom, nitro group, or cyano group, or an alkyl group having 1 to 20 carbon atoms, alkenyl group having 2 to 20 carbon atoms, or alkynyl group having 2 to 20 carbon atoms, each having an optional substituent Z5;
and
Z5 represents a chlorine atom, bromine atom, iodine atom, nitro group, or cyano group.

8 more elements

Dependencies are inferred from the claim text.

Charge-transporting varnish

Life of this patent

Charge-transporting varnish

Life of this patent

Abstract

Claims15