Patent · US Expired

Organic electroluminescent element

US7862904B2 · kind B2 · utility

11Cited by

6References

17Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Horst Vestweber · Prüm, DE
Anja Gerhard · Egelsbach, DE
Philipp Stöβel · Frankfurt, DE

Key dates

Filing date	Jul 20, 2004
Grant date	Jan 4, 2011
Priority date	—
Expiry date	Sep 28, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S428/917
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to the improvement of phosphorescent organic electroluminescent devices by using materials of the formula in the hole blocking layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.