Low work function of the (1000) Ca2N surface
Publication year
2004Source
Journal of Applied Physics, 96, 3, (2004), pp. 1751-1753ISSN
Publication type
Article / Letter to editor
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Organization
Electronic Structure of Materials
Journal title
Journal of Applied Physics
Volume
vol. 96
Issue
iss. 3
Page start
p. 1751
Page end
p. 1753
Subject
Theory of Condensed MatterAbstract
Polymer diodes require cathodes that do not corrode the polymer but do have low work function to minimize the electron injection barrier. First-principles calculations demonstrate that the work function of the (1000) surface of the compound Ca2N is half an eV lower than that of the elemental metal Ca (2.35 vs 2.87 eV). Moreover, its reactivity is expected to be smaller. This makes Ca2N an interesting candidate to replace calcium as cathode material for polymer light emitting diode devices. (C) 2004 American Institute of Physics.
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