| 摘要 |
<p>PURPOSE:To obtain a stable photoelectric screen which changes to a small degree with the passing of time by applying a liquid solution containing the first group matter such as decalin, the second group matter such as naphthalene, and an alkali metal to a base plate coated with an Sb layer, and heating the applied liquid solution so as to evaporate the first and the second group matters. CONSTITUTION:An Sb layer is formed on the surface of a base plate made of glass, Ni or the like. Next, a matter chosen from among pi-electron-system unsaturated hydrocarbon such as naphthalene or diphenyl is dissolved into a solvent chosen from among cyclic hydrocarbons which are liquid at ordinary temperature such as decalin or cyclohexane, and thus prepared solution is added with an alkali metal such as Se, K or Na to make a mixture solution. Then, the mixture solution is applied to the surface of the Sb layer, and heated, for example, at 230 deg.C for 10min so as to evaporate the matters belonging to the first and the second groups. After that, the Sb-alkali matter formed on the base plate is heated and activated in vacuum. As a result, a stable photoelectric screen which changes little with the passing of time can be obtained.</p> |
