ORGANIC ELECTROLUMINESCENT ELEMENT AND ILLUMINATING DEVICE USING SAME

摘要

Disclosed is an organic electroluminescent element wherein a transparent conductive layer, an organic electroluminescent layer and a counter electrode are sequentially arranged on a transparent base. The organic electroluminescent element is characterized in that an organic-inorganic composite material layer is formed between the transparent base and the transparent conductive layer in such a manner that the organic-inorganic composite material layer is in contact with the transparent conductive layer, and that the film thicknesses of the layers satisfy the following formulae. Also disclosed is an illuminating device. Formula (1): 5 < t3/(t1 + t2) < 50 Formula (2): 1 < t3 < 20 In the formulae, t1 represents the film thickness of the organic electroluminescent layer (µm), t2 represents the film thickness of the transparent conductive layer (µm), and t3 represents the film thickness of the organic-inorganic composite material layer (µm).