| 摘要 |
310,874. Siemens & Halske Akt.- Ges. May 2, 1928, [Convention date]. Light-sensitive cells. -The photo-electric effect is produced at the boundarv between two materials for example copper 1 and cupric oxide 2, where there is a resistance independent of the thickness of the two materials. The surface of the copper or other material is coated with a layer about 1/20th mm. in thickness of a compound of the metal, for example the oxide or sulphide, and this layer is covered with a grid-shaped electrode 3 of good conducting material. Alternatively the call is illuminated through the metal layer, which is made of foil permeable to light and covered by an integral wide-meshed grid (Fig. 2, not shown). An electric potential less than one volt is applied to the layers from a potentiometer 5 in a direction depending on whether the metal or the compound is illuminated. |
