Cathodoluminescence response from rare earth doped Bi4Ge 3O12
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Date
2009
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Abstract
Room and low temperature cathodoluminescence (CL) of rare earth doped Bi4Ge3O12 (BGO) has been recorded. Luminescence signals noted in the wavelength range (300 - 800 nm) include intrinsic broad emission bands and signals related to Eu3+, Nd3+, and Tm3+. CL measurements made on Bi4Ge3O 12 (BGO) doped with rare earth ions are reported for the temperature range 40 to 300 K with different CL excitation modulation frequencies. Dopant levels used in the present study are 1.1, 0.4, and 0.3 wt% Nd, 0.4 wt% Tm and 3 ppm Eu. All dopant levels exhibited different CL spectra with evidence for lines due to the rare-earth dopants intra-4f transitions. The temperature dependence of the intensity of the emission band is discussed.
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Keywords
Cathodoluminescence , Doping (additives) , Europium , Germanium , Luminescence , Metal ions , Rare earths , Temperature , Temperature distribution , Broad emission bands , Low temperatures , Luminescence signals , Modulation frequencies , Rare earth dopants , Temperature dependence , Temperature range , Wavelength ranges , Condensed matter physics