Non-aqueous ink composition
AssigneeNissan Chemical Corporation
InventorsYuta KANNO, Masayuki HIGASHI, Haruka MURAKAJI, Chika SHIBATA
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Abstract
The present invention relates to a non-aqueous ink composition containing (a) a polythiophene containing a repeating unit complying with formula (I); (b) metal oxide nanoparticles containing at least (b-1) a first metal oxide nanoparticle having an average primary particle diameter d1 and (b-2) a second metal oxide nanoparticle having an average primary particle diameter d2, wherein d1<d2; and (c) a liquid carrier containing one or more organic solvents, as well as a pile-up suppressor and a lifetime extension agent for an organic EL device, containing metal oxide nanoparticles containing at least the (b-1) and (b-2) described above, wherein d1<d2.
Claims40
A non-aqueous ink composition comprising:
- (a) a polythiophene comprising a repeating unit complying with formula (I):
- wherein R1 and R2 are each, independently, H, alkyl, fluoroalkyl, alkoxy, aryloxy, or —O—[Z—O]p—Re;
- wherein
- Z is an optionally halogenated hydrocarbylene group,
- p is equal to or greater than 1, and
- Re is H, alkyl, fluoroalkyl, or aryl;
- (b) metal oxide nanoparticles comprising at least (b-1) and (b-2) below:
- (b-1) a first metal oxide nanoparticle having an average primary particle diameter d1
- (b-2) a second metal oxide nanoparticle having an average primary particle diameter d2, wherein the average primary particle diameters d1 and d2 satisfy the relation d1<d2;
- and
- (c) a liquid carrier comprising one or more organic solvents.
A pile-up suppressor for suppressing a pile-up phenomenon occurring during the formation of a charge transporting film by applying to a substrate having a liquid repellent bank, and drying, a non-aqueous ink composition if added to the non-aqueous ink composition, the pile-up suppressor comprising metal oxide nanoparticles,
- wherein the metal oxide nanoparticles comprise at least (b-1) and (b-2) below:
- (b-1) a first metal oxide nanoparticle having an average primary particle diameter d1
- (b-2) a second metal oxide nanoparticle having an average primary particle diameter d2,
- wherein the average primary particle diameters d1 and d2 satisfy the relation d1<d2.
A non-aqueous ink composition comprising:
- (a) a polythiophene comprising a repeating unit complying with formula (I):
- wherein R1 and R2 are each, independently, H, alkyl, fluoroalkyl, alkoxy, aryloxy, or —O—[Z—O]p—Re;
- wherein
- Z is an optionally halogenated hydrocarbylene group,
- p is equal to or greater than 1, and
- Re is H, alkyl, fluoroalkyl, or aryl;
- (b) metal oxide nanoparticles comprising at least (b-1) and (b-2) below:
- (b-1) a first metal oxide nanoparticle having an average primary particle diameter d1
- (b-2) a second metal oxide nanoparticle having an average primary particle diameter d2,
- wherein the average primary particle diameters d1 and d2 satisfy the relation d1<d2;
- (c) a liquid carrier comprising one or more organic solvents;
- (d) a synthetic polymer comprising one or more acidic groups;
- and
- (e) at least one amine compound.
A lifetime extension agent for an organic EL device, comprising metal oxide nanoparticles,
- wherein the metal oxide nanoparticles comprise at least (b-1) and (b-2) below:
- (b-1) a first metal oxide nanoparticle having an average primary particle diameter d1
- (b-2) a second metal oxide nanoparticle having an average primary particle diameter d2,
- wherein the average primary particle diameters d1 and d2 satisfy the relation d1<d2.
Dependencies are inferred from the claim text.