ORGANIC ELECTROLUMINESCENT ELEMENT AND LIGHTING DEVICE USING SAME

摘要

The present disclosure relates to an organic electroluminescence element including: a substrate 1 having a light transmissive property; a light diffusion layer 2; a light transmissive electrode 3 ; a light reflective electrode 4; and a light emitting layer E. With regard to the first light emitting layer E1 being the first closest light emitting layer to the light reflective electrode 4, the relation defined by following expression (2) is satisfied,
[FORMULA 1] Æ » m × » m 4 �¢ À + l + 0.1 2 �¢ » m ‰¤ n m » m × d m ‰¤ Æ » m × » m 4 �¢ À + l + 0.5 2 �¢ » m
wherein, » m represents the weighted average emission wavelength, Æ m represents the phase shift, n m (» m ) represents the average refractive index of a medium filling a space between the light reflective electrode 4 and the first light emitting layer E1, and d m represents the distance from the light reflective electrode 4 to the first light emitting layer E1. m is equal to 1. 1 is an integer equal to or more than 0.