Crystal growth and spectroscopic properties of MoO3 and WO3 doped Bi4Ge3O12 by optical floating zone method

MoO3 and WO3 doped Bi4Ge3O12 (BGO) crystals were grown by the optical floating zone (OFZ) method. The structure of doped crystals was determined by XRD. The fluorescence spectra and fluorescence decay curves of these BGO crystals at room temperature were also studied. The emission intensity of BGO crystals increased with WO3 dopant but decreased with MoO3 dopant. A heavily WO3 doped BGO has shown a much shorter decay time than undoped BGO at about 500 nm.