Sol-gel method for forming thin luminescent films

摘要

A sol-gel procedure is described for making display devices with luminescent films. The procedure typically involves hydrolysis and polymerization of an organometallic compound together with selected luminescent ions, and coating of a substrate and then heat treatment to form a polycrystalline layer. The procedure is particularly useful for making cathode ray tubes, especially those for high power operation because of the excellent luminescence characteristics obtained, good thermal contact from the luminescent layer to faceplate and low cost of the procedure. Also described are the devices obtained which exhibit a layer of complex oxide with network structure much like the corresponding bulk compound.