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    • 4. 发明专利
    • OPTOELECTRONIC ELEMENT
    • JPH03171778A
    • 1991-07-25
    • JP31131689
    • 1989-11-30
    • HITACHI CHEMICAL CO LTD
    • TAKEUCHI KAZUMASAYAMADERA TAKASHIHONDA YUTAKATAGUSARI TOSHINORIOBATA RITSUKO
    • H01L31/10
    • PURPOSE:To acquire an optoelectronic element which generates a pulse current corresponding to change of light strength by a three-component layer containing an electron donating substance, a phthalocyanine coloring matter and an electron accepting substance which are laminated on a first electrode, and a second electrode through electrolyte. CONSTITUTION:A film 2 of a first electrode is formed on a first substrate 1 and a three-component layer 3 is formed thereon. The three-component layer 3 is in contact with a solid state film (electrolytic layer) 4 and a second electrode 5 is formed on a surface thereof. A salt bridge 7 to connect a third electrode (reference electrode) is connected to the solid state film (electrolytic layer) 5. The three-component layer is formed by laminating an electron donating substance, a phthalocyanine coloring matter and an electron accepting substance. When light of a wavelength which allows phthalocyanine coloring matter to show absorption is irradiated to the optoelectronic element, a pulse-like current flows corresponding to change of light strength. At this time, a direction of a pulse current can detect change of light strength of irradiated light by measuring a current value thereof. Use of the element as a light switch can be realized by using the current properties.
    • 6. 发明专利
    • OPTICAL RECORDING METHOD
    • JPS62165652A
    • 1987-07-22
    • JP833586
    • 1986-01-18
    • HITACHI CHEMICAL CO LTD
    • YAMADERA TAKASHITAGUSARI TOSHINORIHAYASHI NOBUYUKI
    • G11B7/00G03C1/73G03C5/08G03C5/56G11B7/004G11B7/241G11B7/244
    • PURPOSE:To enable recording and reproducing of information without inducing the breakdown of reading out by using a material which can attain a mixed valency state for at least either of an electron donative material and electron acceptive material. CONSTITUTION:A photosensitizer S is converted by writing light to a photosensitizer S* of an excitation type. The photosensitizer is made to an oxidation type S . and reduction type A . respectively by transferring electrons to the electron acceptive material A. S . is still active and reacts with the electron donative material D in succession thereof to apply the oxidation type D*. thereof. The photosensitizer itself is returned to S. The photosensitizer is thus regenerated. The physical and optical change generated in at least either of D . and A . is optically read by the wavelength different from the wave length used in th stage of the previous writing, by which the nondestructive reading out is attained. The writing and reading out of the information are thereby executed all non-destructively and since the materials of a wide wave length range are usable, the wide design meeting the light source and detector of the system is made possible.