Effect of Hydrogenation on Photodarkening in CdS-Doped Glass

The effect of hydrogenation on photodarkening has been investigated in CdS-doped glass to investigate the nature of photoinduced defects using luminescence and electron spin resonance (ESR). Photodarkening disappears after hydrogenation. This indicates that the photoinduced defects are passivated by hydrogen. The possible structures of the defects are considered in this paper.