Light emitting device

Details Light emitting device Light emitting device

2008-12-16

2010-06-15

Weiss, Howard (Department: 2814)

Active solid-state devices (e.g., transistors, solid-state diode

Organic semiconductor material

C250S304000, C428S690000, C428S917000

Reexamination Certificate

active

07737437

ABSTRACT:
A triplet light emitting device which has high efficiency and improved stability and which can be fabricated by a simpler process is provided by simplifying the device structure and avoiding use of an unstable material. In a multilayer device structure using no hole blocking layer conventionally used in a triplet light emitting device, that is, a device structure in which on a substrate, there are formed an anode, a hole transporting layer constituted by a hole transporting material, an electron transporting and light emitting layer constituted by an electron transporting material and a dopant capable of triplet light emission, and a cathode, which are laminated in the stated order, the combination of the hole transporting material and the electron transporting material and the combination of the electron transporting material and the dopant material are optimized.

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