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

• Main Authors: IMADA ICHIRO, TSURUYA YASUYUKI
• Format: Patent
• Language: English
• Published: 01.08.2013
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

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.