Structural and photoluminescence properties of La3+ doped CdO nanophosphors synthesised via green mediated solution combustion route  

作　　者：M.S. Geetha H.N. Shivananjaiah 

机构地区：[1]Vijaya Composite College,Bangalore,560 003,India [2]Government Science College,Nrupatunga Road,Bangalore 560 001,India

出　　处：《Journal of Rare Earths》2019年第9期916-923,I0001,共9页稀土学报（英文版）

摘　　要：This paper reports a facile environmentally safe green combustion synthesis method of La3+doped CdO nanoparticles(NPs)using different concentrations of Aloe vera(A.V)gel as combustible material.The crystallite size obtained using PXRD pattern is found to be 12-22 nm.The structural analysis was further analysed by Rietveld refinement technique.The X-ray photoelectron spectroscopy(XPS)analysis reveals the presence of two electronic states of CdO around 400 and 411 eV attributed to Cd 3 d3/2 and 3 d3/2,respectively.The photoluminescence(PL)studies were carried upon 350 nm excitation wavelength.The PL emission spectra are found to have two prominent peaks centered at 410 and 510 nm and are attributed to 5D3→7F1 and 5D1→7F0 transitions,respectively.The Commission International de l’Eclairage(CIE)chromaticity diagram reveals blue-green color emission.The correlation color temperature(CCT)value is found to be around^9793 K.The obtained results suggest that the product is quite useful for cool light emitting diode applications when doping concentration is 2 mol%.This paper reports a facile environmentally safe green combustion synthesis method of La3+ doped CdO nanoparticles（NPs） using different concentrations of Aloe vera（A.V） gel as combustible material. The crystallite size obtained using PXRD pattern is found to be 12-22 nm. The structural analysis was further analysed by Rietveld refinement technique. The X-ray photoelectron spectroscopy（XPS） analysis reveals the presence of two electronic states of CdO around 400 and 411 eV attributed to Cd 3 d3/2 and 3 d3/2,respectively. The photoluminescence（PL） studies were carried upon 350 nm excitation wavelength. The PL emission spectra are found to have two prominent peaks centered at 410 and 510 nm and are attributed to 5D3→7F1 and 5D1→7F0 transitions, respectively. The Commission International de l’Eclairage（CIE） chromaticity diagram reveals blue-green color emission. The correlation color temperature（CCT） value is found to be around ～9793 K. The obtained results suggest that the product is quite useful for cool light emitting diode applications when doping concentration is 2 mol%.

关 键 词：Green synthesis NANOSTRUCTURES PHOTOLUMINESCENCE Judd-ofelt RARE earths CDO 

分 类 号：TF[冶金工程]