Elucidation of activation layer model by means of measurements of photoelectron energy distribution curves

Autor:	Oleg E. Tereshchenko, H. E. Scheibler, D. Schwalm, S. Pastuszka, A. Wolf, A. S. Terekhov, D. Kratzmann, A. G. Paulish, Dmitri A. Orlov
Rok vydání:	1998
Předmět:	Dipole chemistry Caesium Analytical chemistry chemistry.chemical_element Quantum efficiency Heterojunction Vacuum level Saturation (chemistry) Oxygen Layer (electronics)
Zdroj:	AIP Conference Proceedings.
ISSN:	0094-243X
DOI:	10.1063/1.54978
Popis:	The comparative study of (Cs,NF3) and (Cs,O2) activation procedures and the measurements of the vacuum level position versus activation layer thickness show that the activation layer for optimally activated GaAs photocathodes with QE of about 20–30% should be treated as a dipole layer. For thick activation layers, the saturation of the vacuum level at the lowest position is observed. The saturation proves, that the activated surface should be treated as a heterojunction.
Databáze:	OpenAIRE
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