Optical and photoemissive properties of multi-alkali photocathodes
- 14 September 1993
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 26 (9) , 1499-1502
- https://doi.org/10.1088/0022-3727/26/9/025
Abstract
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 Eg 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.Keywords
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