High efficiency photoemission from Cs–K–Te

Bisero, D. and Oerle van, B.M. and Ernst, G.J. and Verschuur, J.W.J. and Witteman, W.J. (1997) High efficiency photoemission from Cs–K–Te. Applied Physics Letters, 70 (12). pp. 1491-1493. ISSN 0003-6951

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Abstract:	Cs–K–Te films have been fabricated under ultrahigh vacuum by vapor deposition of Te, K, and Cs onto a Mo substrate into the preparation chamber of the free electron laser of the University of Twente. Their photoemission properties are reported in this letter. The average quantum efficiency at 259 nm measured on 5 evaporated Cs–K–Te photocathodes is 22.5%, whereas the best quantum efficiency obtained at 259 nm is 23.4%. To our knowledge, this is the highest quantum efficiency at 259 nm reported so far, being about twice that of Cs2Te photocathodes. The reported results demonstrate that Cs–K–Te photocathodes are very promising for the use in photoinjectors.
Item Type:	Article
Copyright:	© 1997 American Institute of Physics
Faculty:	Science and Technology (TNW)
Research Group:	Laser Physics and Nonlinear Optics (LPNO)
Link to this item:	http://purl.utwente.nl/publications/73818
Official URL:	http://dx.doi.org/10.1063/1.118362
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