Organic electroluminescent device with emission from hole transp

Details Organic electroluminescent device with emission from hole transp Organic electroluminescent device with emission from hole transp

1997-04-18

1999-03-23

O'Shea, Sandra

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313504, 313506, 427 66, 428690, 252582, H01J 162, H01J 6304, B05D 506, B05D 512

Patent

active

058864644

ABSTRACT:
An organic EL device comprises a cathode, an electron transporting layer (ETL), a hole transporting layer (HTL) and an anode which are laminated in sequence, wherein the materials making up the ETL and HTL are so selected that the energy barrier for hole injection from the HTL to the ETL is substantially higher than the energy barrier for electron injection from the ETL to the HTL. The organic EL device obtained has efficient light emission from the HTL layer when an efficient fluorescent dye as an emitter is doped in the HTL or the part of the HTL close to the ETL/HTL interface.

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