| http://www.w3.org/ns/prov#value | - of 1 to 12, an aryl or aryloxy group having a carbon number of 6 to 14, a heterocyclic compound group, a cyano group, a halogen group, a halogenated alkyl group, or a nitro group. [0040] Further, condensed ring compounds, such as a perylene derivative or the like, shown in the above formulas (23) to (35) are preferably used as materials having an electron transport capability, of the electron tran
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