ORGANIC ELECTROLUMINESCENT ELEMENT

PROBLEM TO BE SOLVED: To contain a hole in a luminescent layer and improve efficiency of re-coupling with an electron by providing a hole transportation preventing layer on a negative electrode side of the luminescent layer. SOLUTION: In this organic EL element, preferably, an electron transportation layer is provided on a negative electrode side of a hole transportation preventing layer, and energy difference between a HOMO level of a luminescent layer and a HOMO level of a hole transportation preventing layer is more than 0.3 eV. Preferably, in this organic EL element, an electron transportation laminated layer film or a hole transportation laminated layer film is used as the electron transportation layer or the hole transportation layer, the electron transportation laminated layer film and the hole transportation laminated layer film are respectively a laminated layer film of various electron transportation materials and a laminated layer film of various hole transportation materials, and the laminated layer films are laminated in the order of oxidation voltage or reduction voltage of molecules constituting the films. Thus, effect of re-coupling with an electron is improved to provide high efficiency light emission, and high luminance can be realized by low voltage drive.