| 摘要 |
PROBLEM TO BE SOLVED: To provide a white color group organic EL element with few color change. SOLUTION: The white color group electroluminescent element 1 of which, a light emitting layer is composed of a blue color group light emitting layer 5 and a yellow - red color group light emitting layer 6, is formed by laminating a positive electrode 2, the blue color group light emitting layer 5 containing host material and blue color group dopant, the yellow - red color group light emitting layer 6 containing host material same with that of the blue color light emitting layer and yellow - red color group dopant, and a negative electrode 8 in this sequence. For such an EL element of which, the light emitting layer is split into two, the tendency of emitted color, leaning toward red color side, is cancelled by forming the positive electrode 2 side light emitting layer of which, light emitting area tends to lean toward one side, by the blue color group light emitting layer 5. Accordingly, the thickness of the yellow - red color group light emitting layer 6 can be made thicker, and the color change becomes few. COPYRIGHT: (C)2003,JPO
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