Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1997-05-01
1999-07-20
O'Shea, Sandra
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313506, 313507, H01J 162, H01J 6304
Patent
active
059259809
ABSTRACT:
An organic electroluminescent device with graded region is formed, which includes a hole transporting region formed of hole transporting organic material, an electron transporting region formed of electron transporting organic material, and a graduated region disseminated between the hole transporting region and the electron transporting region. The graduated region changes, either in steps or continuously, from hole transporting organic material adjacent the hole transporting region to electron transporting organic material adjacent the electron transporting region. Electrical contacts are formed in communication with the hole transporting region and the electron transporting region.
REFERENCES:
patent: 5151629 (1992-09-01), VanSlyke
patent: 5755999 (1998-05-01), Shi et al.
patent: 5804322 (1998-09-01), Shi et al.
patent: 5834130 (1998-11-01), Kido
Gorsuch Cynthia A.
Lee Hsing-Chung
Shi Song Q.
So Franky
Koch William E.
Motorola Inc.
O'shea Sandra
Parsons Eugene A.
Smith Michael J.
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