Photoluminescence emission and structure diversity in ZnO:Ag nanorods

E. Velázquez Lozada, G. M. Camacho González, T. Torchynska

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6 Scopus citations

Abstract

The photoluminescence, its temperature dependences, as well as structural characteristics by methods of Scanning electronic microscopy (SEM) have been studied in ZnO:Ag nanorods prepared by the ultrasonic spray pyrolysis (USP). The PL spectra of the ZnO:Ag NRs over the temperature range from 10 K to 300 K are investigated. Three types of PL bands have been revealed: i) the near-band-edge (NBE) emissions, ii) defect related emission and iii) IR emissions. It is shown the IR emission corresponds to the second-order diffraction of the near-band-edge (NBE) emission bands. The study of NBE PL temperature dependences reveals that the acceptor bound exciton (ABE) and its second-order diffraction peak disappeared at the temperature higher than 200 K. The attenuation of the ABE peak intensity is ascribed to the thermal dissociation of ABE with appearing of a free exciton (FE). The PL bands, related to the LO phonon replica of FE and its second-order diffraction, dominate in the PL spectra at room temperature that testify on the high quality of the ZnO:Ag films prepared by the USP technology.

Original languageEnglish
Article number012031
JournalJournal of Physics: Conference Series
Volume582
Issue number1
DOIs
StatePublished - 2015
Event7th International Congress of Engineering Physics, CIIF 2014 - Mexico City, Mexico
Duration: 24 Nov 201428 Nov 2014

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