Optically Detected ESR of the Excited States in Silver Halides

Abstract

We have observed ESR spectra of the excited states related to the prompt and delayed luminescences in silver halides. The localized state responsible for the prompt luminescence in AgCl is identified as the self-trapped exciton localized at a chloride ion. The self-trapped hole stage of Ag²⁺ is found to participate in the delayed luminescence in AgCl which is due to the recombination of the distant electron-hole pair. Some information is obtained on the trapped electrons in volved in the delayed luminescence.