| 摘要 |
PURPOSE:To prevent an optical output current flowing reversely without using a diode externally provided by a method wherein the overlapped part of the laminated photoelectric conversion section of a photoelectric conversion element is made to have a reverse optical output current flow preventive function, and a capacitive element is connected to the photoelectric conversion element in parallel to serve as an optical input memory element. CONSTITUTION:A photoelectric conversion element 1 is tandem-type element where photocell sections (photoelectric conversion section) 2 are stacked up, where photocells 2 are laminated between electrodes 3 and 4 and one of the electrodes 3 and 4 is transparent to enable light rays to be incident on the photocells 2. The photocell 2 has a PIN structure composed of three laminated layers, a P layer, an I layer, and an N layer, and an adjacent overlapped part where a P layer and an N layer are overlapped is made to have an optical reverse output current flow preventive function. An optical input memory element 10 has such a structure that the above photoelectric conversion element 1 is mounted on a capacitor composed of an electrode 4, a dielectric layer 12, and an electrode 13 on an insulating board 11, where the electrode 3 is transparent. A capacitor and a photoelectric conversion element use the electrode 4 in common, the end of the electrode 3 is made to reach to the electrode 13, whereby a capacitor is connected to the photoelectric conversion element 1 in parallel. |
