The optical absorption and photoluminescence spectra of multi-alkali photocathodes are presented. The value of the band gap of multi-alkali photocathodes is determined by analysis of these spectra. It has been shown that the band gap E g is equal to 1.3-1.4 eV. The value of the work function is also determined and the conclusion is drawn that multi-alkali photocathodes are photocathodes with negative or nearly zero electron affinity.
No takes yet. Share an insight, caveat, or question.
Beguchev et al. (1993) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: