Abstract: A power supply device comprises a capacitance (Ca) consisting of an overhead power line (100) and an electrode (20) extending in the longitudinal direction of the overhead power line (100) via an insulator (30), an inductance (La) connected in parallel with the capacitance (Ca), and an output portion (50) led out from both ends of a parallel circuit including the capacitance (Ca) and the inductance (La). The parallel circuit is operated as a parallel resonant circuit and power is supplied from the output portion (50), thereby obtaining a compact and simple structure and improving power supply efficiency to a load as compared with a conventional power supply device.

Abstract: Organic-inorganic composite semiconductor material including material mainly made of at least one kind of a metal ion selected from an alkali metal ion, an alkali earth metal ion and a rare-earth metal ion, and a chemical compound represented by the following general formula (1): where Ar1, Ar2 and Ar3 are each independently an aromatic ring group that optionally has a substituent group.