ORGANIC ELECTROLUMINESCENT DEVICE WITH ADDITIVE
PROBLEM TO BE SOLVED: To improve light emission efficiency of an organic electroluminescent device (OLED) containing a phosphorescent organic metal substance by improving a function of the organic EL device.SOLUTION: There is provided the electroluminescent device comprising a cathode, an anode and...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
27.10.2011
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To improve light emission efficiency of an organic electroluminescent device (OLED) containing a phosphorescent organic metal substance by improving a function of the organic EL device.SOLUTION: There is provided the electroluminescent device comprising a cathode, an anode and a light-emitting layer (LEL) located therebetween and comprising a phosphorescent guest material, a hole- and electron-transporting host material, and an efficiency-enhancing material having an ionization potential lower than that of the host material and a triplet energy level that is lower than that of the phosphorescent guest material by no more than 0.2 eV. Such a device provides useful light emission features. |
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Bibliography: | Application Number: JP20110114798 |