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oai:uvadoc.uva.es:10324/324282025-03-26T19:10:04Zcom_10324_1158com_10324_931com_10324_894col_10324_1242

Influence of metal organic chemical vapour deposition growth conditions on vibrational and luminescent properties of ZnO nanorods Montenegro, D. N. Hortelano Santos, Vanesa Martínez Sacristán, Óscar Martínez Tomas, M. C Sallet, V. Muñoz Sanjosé, V. Jiménez López, Juan Ignacio Espectroscopia Raman Raman Spectroscopy Producción Científica A detailed optical characterization by means of micro Raman and cathodoluminescence spectroscopy of catalyst-free ZnO nanorods grown by atmospheric-metal organic chemical vapour deposition has been carried out. This characterization has allowed correlating the growth conditions, in particular the precursors partial-pressures and growth time, with the optical properties of nanorods. It has been shown that a high Zn supersaturation can favor the incorporation of nonradiative recombination centers, which can tentatively be associated with ZnI-related defects. Characterization of individual nanorods has evidenced that ZnI-related defects have a tendency to accumulate in the tip part of the nanorods, which present dark cathodoluminescence contrast with respect to the nanorods bottom. The effect of a ZnO buffer layer on the properties of the nanorods has been also investigated, showing that the buffer layer improves the luminescence efficiency of the ZnO nanorods, revealing a significant reduction of the concentration of nonradiative recombination centers. 2018-11-05T11:39:52Z 2018-11-05T11:39:52Z 2013 info:eu-repo/semantics/article Journal of Applied Physics, 2013, 113, 143513 http://uvadoc.uva.es/handle/10324/32428 10.1063/1.4801534 eng https://aip.scitation.org/doi/10.1063/1.4801534 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 International AIP Publishing SI