Effect of solvents on the morphology and optical properties of rare-earth ions doped BiOBr 3D flower-like microparticles via solvothermal method
作者： Harishkumarreddy Patnam , L. Krishna Bharat , Sk. Khaja Hussain , Jae Su Yu
DOI: 10.1016/J.JALLCOM.2018.05.262
关键词:
摘要: Abstract Eu3+ or Sm3+ ions individually doped bismuth oxybromide (BiOBr) phosphors with three-dimensional flower-like microsphere morphology were prepared by a solvothermal method. The variation of ethylene glycol and ethanol concentrations affected the surface microparticles, which was investigated field-emission scanning electron microscope images. crystallinity phase formation BiOBr microspheres analyzed X-ray diffraction patterns, confirming tetragonal space group P4/nmm (129). photoluminescence (PL) properties measured for Eu3+or single phosphors. From temperature-dependent PL emission spectra, activation energies samples estimated. spectra BiOBr:Eu3+ exhibited reddish orange at 616 nm due to characteristic 5D0 → 7F2 electronic transition blue excitation wavelength 464 nm. revealed an 603 nm under 408 nm. Also, intensities optimized BiOBr:Sm3+ increased after calcination 500 °C.
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