| 摘要 |
PROBLEM TO BE SOLVED: To obtain a white color light emitting organic EL element of low power consumption, efficiently emitting light with high brightness. SOLUTION: On the white color organic EL element, at least one light emitting layer is formed on a substrate by laminating in a sequence of an anode, a hole transport layer containing electron acceptor, an electron blocking layer containing the electron acceptor, the light emitting layer, a hole blocking layer containing an electron donor, and a cathode from anode side, and an electron affinity Ea or an ionization potential Ip of the materials constituting respective layers are constituted so as to have a prescribed relation. COPYRIGHT: (C)2007,JPO&INPIT |
