| http://www.w3.org/ns/prov#value | - r and an electron-transporting layer, one of the electroluminescent layer or the electron-transporting layer comprising any of the above-mentioned oxadiazole compounds, or (4) an electroluminescent layer, an electron-transporting layer, and a hole-transporting layer, the electroluminescent layer being interposed between the electron-transporting layer and the hole-transporting layer, and the elect
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