Chen, P.L., Ma, X.Y. and Yang, D.R. (2007) ZnO:Eu Thin Films: Sol-Gel Derivation and Strong Photoluminescence from 5D0 → 7F0 Transition of Eu3+ Ions. Journal of Alloys and Compounds, 431, 317-320.
http://dx.doi.org/10.1016/j.jallcom.2006.05.078

has been cited by the following article:

• TITLE: Quenching Photoluminescence of Eu(III) by Cu(II) in ZnO:Eu3++Cu2+ Compounds by Solution Combustion Method

  AUTHORS: S. López-Romero, M. J. Quiroz Jiménez, M. García-Hipólito

  KEYWORDS: ZnO, Co-Doped Cu2++Eu3+, Quenching, Photoluminescence, Solution, Combustion

  JOURNAL NAME: World Journal of Condensed Matter Physics, Vol.6 No.3, August 31, 2016

  ABSTRACT: In this study Cu2++Eu3+ co-doped ZnO(ZnO/Cu2++Eu3+) solid solution powders were synthesized by solution combustion method using as oxidant agent zinc nitrate hexahydrate and as fuel urea; the Cu2+ concentrations were 0, 1, 2, 3, 10, and 20 %Wt; the Eu3+ ion concentration was fixed in 3%Wt. The samples after were annealed at 900°C by 20 h in air. The structural results showed the largely presence of a wurtzite solid solution of Cu2++Eu3+doped ZnO, at high Cu2+ doping CuO and Eu2CuO4 phases are also present. Morphological properties were analyzed using scanning electron microscopy (SEM) technique. However it is important to remark that the Cu2+ ions suppress the Eu3+ ion photoluminescence (PL) by means of an overlap mechanism between Cu2+ absorption band and Eu3+emission band (e.g. 5D0→7F2) of the Eu3+ emission spectra.