IP Library Granted Patent US 9,224,928
Granted Patent B2
US 9,224,928 · App. 14/319,410 · Granted Dec 29, 2015

Light emitting element, light emitting device and electronic apparatus

Inventors: Tetsuji Fujita (Chino, JP); Hidetoshi Yamamoto (Suwa, JP)
Assignee: SEIKO EPSON CORPORATION
H01L33/504H01L51/0069H01L51/0071H01L51/006H01L51/0054H01L51/0058H01L51/0061H01L51/5052H01L2251/308
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Quick Facts
Patent No.
US 9,224,928
App. No.
14/319,410
Granted
Dec 29, 2015
Kind
B2
Abstract

The light emitting element of the embodiment includes an anode; a cathode; a visible light emitting layer provided between the anode and the cathode and emitting visible light; and a carrier trapping layer containing a thiadiazole based compound represented by the following formula (1). [In formula (1), A indicates a hydrogen atom, an alkyl group, an aryl group which may have a substituent, an arylamino group, or a triaryl amine, and B indicates a hydrogen atom, an alkyl group, an aryl group which may have a substituent, an arylamino group, or a triaryl amine, or may form a ring.]

Claims (15)

1. A light emitting element comprising:

an anode;

an cathode;

a red light emitting layer;

a blue light emitting layer;

a green light emitting layer; and

an intermediate layer which is interposed between the red light emitting layer and the blue light emitting layer,

the intermediate layer adjusts movement of the holes and electrons between the red light emitting layer and the blue light emitting layer.

2. The light emitting element according to claim 1 , further comprising:

a carrier trapping layer,

the carrier trapping layer is between the anode and the red light emitting layer.

3. The light emitting element according to claim 2 :

the intermediate layer includes a host material of the carrier trapping layer.

4. The light emitting element according to claim 3 :

the host material includes acene based material.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 2, 2026
From: SEIKO EPSON CORPORATION
To: SHIHENG CREATION LIMITED
Reel/Frame 074264/0478 →
Priority Claims (1)
JP 2011-289851 · Dec 28, 2011 · national
Continuity (2)
Continuation 13727339 · Dec 26, 2012
Related Publication 20140332835A1 · Nov 13, 2014