Abstract

It is well known that semi-insulating undoped CdS crystals often show green cathodoluminescence at room temperature. As reported previously, In-doped CdS layer and whisker prepared by vapor reaction show green photo- and cathodoluminescence¹⁾ which does not degrade for being left in air for many years. On one hand, In-doped CdS crystals prepared by Piper-Polich method also show the same luminescence²⁾ at room temperature, but the photoluminescence is lost in several months. These empirical facts on the degradation of luminescence of CdS were verified by an experiment of electron-beam annealing as follows.

© 1984 Optical Society of America