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

Abstract

In this study Cu 2+ +Eu 3+ co-doped ZnO(ZnO/Cu 2+ +Eu 3+ ) solid solution powders were synthesized by solution combustion method using as oxidant agent zinc nitrate hexahydrate and as fuel urea; the Cu 2+ concentrations were 0, 1, 2, 3, 10, and 20 %Wt; the Eu 3+ 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 Cu 2+ +Eu 3+ doped ZnO, at high Cu 2+ doping CuO and Eu 2 CuO 4 phases are also present. Morphological properties were analyzed using scanning electron microscopy (SEM) technique. However it is important to remark that the Cu 2+ ions suppress the Eu 3+ ion photoluminescence (PL) by means of an overlap mechanism between Cu 2+ absorption band and Eu 3+ emission band (e.g. 5 D 0 → 7 F 2 ) of the Eu 3+ emission spectra.

Effects of the Cu Ion on the Structural and Optical Properties of Yttrium Doped ZnO by Solution Combustion

“…Auger process depends on the doping atoms concentration and defects in the lattice. [19]. However, in Fig.…”

“…The ZnO has been co-doped with various elements (rare earth, lanthanides, metals, etc.) combined [2] can quench some emission photoluminescence type [19] as will be showed in this study. However, the doping of ZnO with Cu 2+ ions cannot modify ZnO structure [20].…”

Formation and optical characteristics of ZnO:Eu/ZnO nanowires grown by sputtering-assisted metalorganic chemical vapor deposition

“…There have been several reports on red luminescence from Eu 3+ ions in Eu-doped ZnO nanostructures including thin films, [10][11][12][13][14][15] nanocrystals [16][17][18][19] and nanorods/NWs. [20][21][22] We focus on ZnO NW structures as a host configuration to improve the crystal quality compared with conventional thinfilm configurations, and in this way increase the luminescence intensity.…”

The role of Cu 2+ concentration in luminescence quenching of Eu3+/Cu2+ co-doped ZrO2 nanoparticles

“…An alternate approach to producing luminescence with tailoring the light emission capabilities is to manipulate the matrix to control energy transfer [7,8]. Previous studies reported that luminescence quenching for Eu 3+ emission was obtained by doping Cu 2+ in ZnO [9] and glass matrix [10]. In particular, in our knowledge, there are no reports on the luminescence quenching for Eu 3+ / Cu 2+ doped ZrO2 nanoparticles.…”