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Free-carrier contribution to the optical response of N-rich Cu3N thin films

AuthorsGordillo, Nuria; González-Arrabal, Raquel ; Álvarez-Herrero, A.; Agulló-López, F.
Optical transitions
Thin films
Issue Date23-Jul-2009
PublisherAmerican Institute of Physics
CitationJournal of Physics D: Applied Physics, 42, 165101 (2009)
AbstractThe influence of nitrogen excess on the optical response of N-rich Cu3N films is reported. The optical spectra measured in the wavelength range from 0.30 to 20.00 µm have been correlated with the elemental film composition which can be adjusted in the nitrogen atomic percentage (at%) range from 27 ± 2 up to 33 ± 2. The absorption spectra for the N-rich films are consistent with direct optical transitions corresponding to the stoichiometric semiconductor Cu3N plus a free-carrier contribution that can be tuned in accordance with the N-excess. The data are consistent with the incorporation of the excess N in the lattice as an electron acceptor that generates free holes.
Publisher version (URL)http://link.aip.org
http://dx.doi.org/ 10.1088/0022-3727/42/16/165101
Appears in Collections:(IMN-CNM) Artículos
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