Emission diversity of ZnO nanocrystals with different growth temperatures

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

Research output: Contribution to conferencePaper

Abstract

© 2014 Materials Research Society. Scanning electronic microscopy (SEM), X ray diffraction (XRD) and photoluminescence (PL) have been applied to the study of structural and optical properties of ZnO nanocrystals prepared by the ultrasonic spray pyrolysis (USP) at different temperatures. The variation of temperatures and times at the growth of ZnO films permits modifying the ZnO phase from the amorphous to crystalline, to change the size of ZnO nanocrystals (NCs), as well as to vary their photoluminescence spectra. The study has revealed three types of PL bands in ZnO NCs: defect related emission, the near-band-edge (NBE) PL, related to the LO phonon replica of free exciton (FE) recombination, and its second-order diffraction peaks. The PL bands, related to the LO phonon replica of FE, and its second-order diffraction in the room temperature PI spectrum testify on the high quality of ZnO films prepared by the USP technology.
Original languageAmerican English
Pages45-51
Number of pages39
DOIs
StatePublished - 1 Jan 2014
EventMaterials Research Society Symposium Proceedings -
Duration: 1 Jan 2014 → …

Conference

ConferenceMaterials Research Society Symposium Proceedings
Period1/01/14 → …

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Lozada, E. V., Torchynska, T., & González, G. C. (2014). Emission diversity of ZnO nanocrystals with different growth temperatures. 45-51. Paper presented at Materials Research Society Symposium Proceedings, . https://doi.org/10.1557/opl.2014.837