Organic EL element

Patent metadata

Field	Value
Publication number	US-8999832-B2
Application number	US-201313739363-A
Country	US
Kind code	B2
Filing date	Jan 11, 2013
Priority date	Aug 6, 2010
Publication date	Apr 7, 2015
Grant date	Apr 7, 2015

Abstract

An organic electroluminescent (EL) element comprises: an anode; a cathode; a functional layer disposed between the anode and the cathode, and including a light-emitting layer containing an organic material; a hole injection layer disposed between the anode and the functional layer; and a bank that defines an area in which the light-emitting layer is to be formed, wherein the hole injection layer includes tungsten oxide and includes an occupied energy level that is approximately 1.8 electron volts to approximately 3.6 electron volts lower than a lowest energy level of a valence band of the hole injection layer in terms of a binding energy, the hole injection layer has a recess in an upper surface of the area defined by the bank, and an upper peripheral edge of the recess is covered with a part of the bank.

First claim

The invention claimed is:

1. An organic electroluminescent (EL) element, comprising:
an anode;
a cathode;
a functional layer disposed between the anode and the cathode, and including a light-emitting layer containing an organic material;
a hole injection layer disposed between the anode and the functional layer; and
a bank that defines an area in which the light-emitting layer is to be formed, wherein
the hole injection layer includes tungsten oxide and includes an occup…

Assignees

• Panasonic Corp

Inventors

• Nishiyama Seiji
• Ohuchi Satoru
• Komatsu Takahiro
• Sakanoue Kei
• Tsukamoto Yoshiaki
• Fujimura Shinya

Classifications

• H10K59/80518

  Electricity · mapped topic

• H10K59/80515

  Electricity · mapped topic

• H10K71/00

  Electricity · mapped topic

• H10K50/17

  Electricity · mapped topic

• H05B33/22 Primary

  Electricity · mapped topic