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Low vacuum photo electron emitting thin films
Author(s) -
Zimmer C.,
Medyanyk K.,
Schoenhense G.,
Krischok S.,
Lorenz P.,
Schubert J.,
Doll T.
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200880477
Subject(s) - electron , optoelectronics , materials science , thin film , physics , nanotechnology , nuclear physics
Impact ionisation is a standard procedure to ionise gaseous or vaporisable substances in organic mass spectrometry. In this work, a “softer” ionisation is introduced which seems to be an alternative ion source for reducing collision between substance molecules and the hot internal walls of the box. Through collision mainly found in impact ionisation sources, fragments are built especially from thermally sensitive substances falsifying the spectra. We present here photoelectron emitting materials for the soft ionisation using semiconducting compounds, galliumn nitride (GaN), and a representative of the borides, lanthanum hexaboride (LaB 6 ). They are evaluated by photoelectron spectroscopic studies. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)