Active OLED display, method of operating an active OLED display and compound

US10312464B2 · kind B2 · utility

Assignee

• Novaled GmbH · DE

Inventors

• Carsten Rothe · Dresden, DE
• Thomas Rosenow · Dresden, DE
• Martin Koehler · Greifswald, DE
• Mike Zoellner · Dresden, DE
• Andreas Haldi · Dresden, DE
• Tobias Canzler · Dresden, DE

Key dates

• Filing date: Sep 30, 2015
• Grant date: Jun 4, 2019
• Expiry date: Oct 19, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K85/631
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An active OLED display, comprising a plurality of OLED pixels, each of the OLED pixels comprising an anode, a cathode, and a stack of organic layers, wherein the stack of organic layers is provided between and in contact with the cathode and the anode and comprises an electron transport layer, a hole transport layer, and a light emitting layer provided between the hole transport layer and the electron transport layer, and a driving circuit configured to separately driving the pixels of the plurality of OLED pixels, wherein, for the plurality of OLED pixels, a common hole transport layer is formed by the hole transport layers provided in the stack of organic layers of the plurality of OLED pixels, the common hole transport layer comprising a hole transport matrix material and at least one electrical p-dopant, and the electrical conductivity of the hole transport material being lower than 1×10−3 S·m−1 and higher than 1×10−8 S·m−1.