Electroluminescent devices including organic EIL layer

US9634256B2 · kind B2 · utility

Inventors

• Marina E. Kondakova · Kendall, US
• Denis Y. Kondakov · Kendall, US
• Christopher T. Brown · Rochester, US
• Tukaram K. Hatwar · Penfield, US
• Jeffrey P. Spindler · Rochester, US
• William J. Begley · Webster, US

Key dates

• Filing date: Jul 9, 2015
• Grant date: Apr 25, 2017
• Expiry date: Jul 9, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/10

Abstract

An OLED device comprises a cathode, an anode, and has therebetween a light emitting layer (LEL) comprising a phosphorescent emitting compound disposed in a host comprising a mixture of at least one electron transporting co-host which is a benzophenone derivative with a spiro substituent and at least one hole transporting co-host which is a triphenylamine which contains one trivalent nitrogen atom that is bonded only to carbon atoms, at least one of which is a member of an aromatic ring, wherein there is present an electron transporting layer contiguous to the LEL (HBL?) on the cathode side comprising an anthracene or a fluoranthene and wherein there is present an election injecting layer comprising a phenanthroline or a lithium quinolate contiguous to the cathode.