Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2005-12-05
2010-02-23
Patel, Ashok (Department: 2889)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S504000, C428S917000
Reexamination Certificate
active
07667389
ABSTRACT:
A light-emitting element is demonstrated which has a mixed layer between a pair of electrodes. The mixed layer comprises a first region and a second region each of which comprises both a metal oxide and a compound that exhibits an electron donating property to the metal oxide. The light-emitting element is characterized in that the first region and the second region are provided alternately and repeatedly in a thickness direction of the mixed layer and have a thickness of 0.1 nm to 10 nm, and that a concentration of the metal oxide in the first region is different from that in the second region.
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Ikeda Hisao
Iwaki Yuji
Sakata Junichiro
Cook Alex Ltd.
Patel Ashok
Semiconductor Energy Laboratory Co,. Ltd.
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