Organic electroluminescence device

US8883323B2 · kind B2 · utility

Assignee

• IDEMITSU KOSAN CO., LTD. · JP

Inventors

• Yuichiro Kawamura · Sodegaura, JP
• Hiroyuki Saito · Tokyo, JP
• Hitoshi Kuma · Sodegaura, JP
• Masahiro Kawamura · Sodegaura, JP
• Yukitoshi Jinde · Sodegaura, JP
• Hirokatsu Ito · Sodegaura, JP
• Takayasu Sado · Urayasu, JP
• Sayaka Mizutani · Sodegaura, JP

Key dates

• Filing date: Nov 22, 2011
• Grant date: Nov 11, 2014
• Expiry date: Apr 6, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917

Abstract

An organic electroluminescence device that includes an anode, an emitting layer that includes a host and a dopant, a blocking layer, an electron injecting layer, and a cathode where the blocking layer includes an aromatic heterocyclic derivative, the triplet energy ETb (eV) of the blocking layer is larger than a triplet energy ETh (eV) of the host, and the affinity Ab (eV) of the blocking layer and an affinity Ae (eV) of the electron injecting layer satisfy a relationship of Ae−Ab<0.2.