TECHNOLOGY FOCUS - ELECTRONICS - Preferred Device: The electric current which flows into active layer from electrode (I) to electrode (II) is controlled by the voltage applied to the control electrode. The control electrode is equivalent to gate electrode. Electrode (I) and electrode (II) are equivalent to source/drain electrode (16). The insulating layer is a gate insulating film. The active layer consists of field effect transistor equivalent to a channel formation area (17). Alternately, the active layer consists of light emitting element which emits light by the application of voltage to the control electrode, electrode (I) and electrode (II). The electronic device is photoelectric transducer through which an electric current flows between electrode (I) and electrode (II) by irradiation of light to active layer. Alternately, the electronic device is 2-terminal electronic device which has electrode (I), electrode (II), and the active layer provided between electrode (I) and electrode (II), and generates electric power by irradiation of light to the active layer. The active layer emits light by the application of voltage to electrode (I) and electrode (II). Electrode (I) consists of metal having high work function, preferably indium tin oxide. Electrode (II) consists of metal having low work function, preferably aluminum or magnesium.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Particles: The inorganic semiconductor fine particles have n-type electroconductivity, and are fine particles of cadmium sulfide, cadmium-selenium, zinc sulfide, cadmium selenium/cadmium sulfide, cadmium selenium/zinc sulfide, lead-selenium and/or zinc oxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Compounds: The alkyl chain is -(CH2)n-, where n is integer of 3-18. The functional groups are thiol, amino, cyano, carboxy, phosphoric acid and/or phosphine oxide group. The organic semiconductor molecule has p-type electroconductivity, and is condensed polycyclic aromatic compound, porphyrin type derivative, phenyl vinylidene type conjugated oligomer or thiophene type conjugated oligomer.