Title:
PHOSPHORESCENT OLEDS WITH EXCITON BLOCKING LAYER
Document Type and Number:
WIPO Patent Application WO2006076092
Kind Code:
A9
Abstract:
An electroluminescent device comprises a cathode and an anode; and, located therebetween, a light-emitting layer (LEL) comprising at least one hole transporting co-host and at least one electron transporting co-host, together with at least one phosphorescent emitter, and wherein the triplet energy of each of the co-host materials is greater than the triplet energy of the phosphorescent emitter, and further containing an exciton blocking layer comprising a hole transporting material with triplet energy greater or equal to 2.5 eV adjacent the emitting layer on the anode side. The invention provides devices that emit light with high luminous efficiency at low voltage.
Inventors:
KONDAKOVA MARINA EDUARDOVNA (US)
DEATON JOSEPH CHARLES (US)
BROWN CHRISTOPHER TYLER (US)
KLUBEK KEVIN PAUL (US)
HUO SHOUQUAN (US)
DEATON JOSEPH CHARLES (US)
BROWN CHRISTOPHER TYLER (US)
KLUBEK KEVIN PAUL (US)
HUO SHOUQUAN (US)
Application Number:
PCT/US2005/044099
Publication Date:
June 28, 2007
Filing Date:
December 02, 2005
Export Citation:
Assignee:
EASTMAN KODAK CO (US)
KONDAKOVA MARINA EDUARDOVNA (US)
DEATON JOSEPH CHARLES (US)
BROWN CHRISTOPHER TYLER (US)
KLUBEK KEVIN PAUL (US)
HUO SHOUQUAN (US)
KONDAKOVA MARINA EDUARDOVNA (US)
DEATON JOSEPH CHARLES (US)
BROWN CHRISTOPHER TYLER (US)
KLUBEK KEVIN PAUL (US)
HUO SHOUQUAN (US)
International Classes:
C09K11/06; H01L51/50; H05B33/14; H05B33/22
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