White phosphorescent organic light emitting devices

US8513658B2 · kind B2 · utility

Assignee

• UNIVERSAL DISPLAY CORPORATION · US

Inventors

• Brian D'Andrade · Willingboro, US
• James Esler · Yardley, US
• Vadim Adamovich · Yardley, US

Key dates

• Filing date: Sep 4, 2009
• Grant date: Aug 20, 2013
• Expiry date: Jun 15, 2030

Classification

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

Abstract

A device is provided. The device includes an anode, a cathode and a double emissive layer disposed between the anode and the cathode. The double emissive layer includes a first organic emissive layer and a second organic emissive layer. The second organic emissive layer is disposed between the anode and the cathode, and is adjacent to the first organic emissive layer. The device also includes a blocking layer disposed adjacent to the second organic emissive layer and between the second organic emissive layer and the anode. The device also includes a hole transport layer disposed between the blocking layer and the anode. At least one of the anode and the cathode is transmissive.