Low-symmetry Td-distorted Co2+ centres in ceramic ZnO:Co

Han, T.P.J. and Villegas, M. and Peiteado, M. and Caballero, A.C. and Rodríguez, F. and Jaque, F. (2010) Low-symmetry Td-distorted Co2+ centres in ceramic ZnO:Co. Chemical Physics Letters, 488 (4-6). pp. 173-176. ISSN 0009-2614 (https://doi.org/10.1016/j.cplett.2010.02.028)

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Abstract

The reflectivity and photoluminescence of cobalt-doped ZnO ceramics samples have been studied by optical spectroscopy. The result reveals, in addition to the emission bands associated with intrinsic defects, weak narrow emission peaks which are ascribed to a mixed 4T1(P), 2T1(G), 2E(G) → 4A2(F) transition between Co2+ d-levels located in regular Zn2+ sites, [Co2+]Zn and a broad near infrared emission band centred at 710 nm which has been interpreted as belonging to Co2+ ions located in a perturbed Zn2+ site, . This study shows that the annealing treatment at 800 °C activates the diffusion of point defects thus creating more [Co2+]Zn centres.

  • Item type:Article
    ID code:27479
    Dates:
    Date
    Event
    22 March 2010
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user:Users 1261 not found.
    Date deposited:20 Sep 2010 13:33
    Last modified:08 Apr 2024 18:37
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/27479
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