| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic EL device improving color purity of light to emit and increasing a ratio of light to emit against the emitted light. SOLUTION: The organic EL device 1 comprises: a transparent electrode 24; a semi-transparent half-reflecting electrode 32; a light-emitting layer 28 arranged between these electrodes; and a reflecting layer 22 which is arranged on the opposite side interposing the transparent electrode 24 viewed from the light-emitting layer 28 and reflects light from the light-emitting layer 28 toward the semi-transparent half-reflecting electrode 32. The optical distance L' between the reflecting layer 22 and the semi-transparent half-reflecting electrode 32 is established so as to intensify the desired wavelength of light emitted through the semi-transparent half-reflecting electrode 32. The optical distance L'<SB>0</SB>between the position where light is most intense in the light-emitting layer 28 and the reflecting layer 22 is established so as to intensify the desired wavelength of the light emitted through the semi-transparent half-reflecting electrode 32. COPYRIGHT: (C)2009,JPO&INPIT
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