ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC EL ILLUMINATION, AND ORGANIC EL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a white light-emitting organic electroluminescent element including two or more luminous layers and having a low drive voltage, a high white light emitting efficiency, and excellent reproducibility.SOLUTION: In the organic electroluminescent element including an anod...

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Bibliographic Details
Main Authors IMADA ICHIRO, TSURUYA YASUYUKI
Format Patent
LanguageEnglish
Published 01.08.2013
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Summary:PROBLEM TO BE SOLVED: To provide a white light-emitting organic electroluminescent element including two or more luminous layers and having a low drive voltage, a high white light emitting efficiency, and excellent reproducibility.SOLUTION: In the organic electroluminescent element including an anode, a cathode, and a light-emitting layer formed therebetween, the light-emitting layer includes a layer formed by wet deposition and a layer formed by vacuum deposition, sequentially from the anode side. The layer formed by wet deposition is a layer containing a phosphorescent material of low molecular weight compound, and a charge transport material. The layer formed by vacuum deposition is a layer containing a fluorescent material of low molecular weight compound, and a charge transport material. Emission spectrum of the organic electroluminescent element has maximum emission wavelengths in the 440-500 nm region, 510-550 nm region, and 580-630 nm region.
Bibliography:Application Number: JP20120007131