| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a white phosphorescent organic EL element having excellent performance stability for variation in dopant concentration in an organic electroluminescent element which ensures low voltage drive by improving injection into a phosphorescent layer, and exhibits white light emission by containing a plurality of phosphorescent dopants having different emission wavelength, and to provide a luminaire. <P>SOLUTION: In an organic EL element having a pair of electrodes and a luminous layer arranged between the electrodes, the luminous layer contains at least one kind of phosphorescent dopant having the λmax of emission in the range of 300-480 nm. The dopant has a partial structure of metal complex, the luminous layer contains at least a host compound and the phosphorescent dopant. Concentration of the phosphorescent dopant in the luminous layer is not constant in the thickness direction, and the thickness of the luminous layer is 70 nm or more. <P>COPYRIGHT: (C)2012,JPO&INPIT |
