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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 78  2019
Synthesis and Optoelectronic Characteristics of MGdAl3O7:Eu3+ Nanophosphors for Current Display Devices
Sonika Kadyan,a Sitender Singh,a Suman Sheoran,a Anura Samantilleke,b Bernabe Maric and Devender Singha, b, *
Pages : 219-226
DOI : 10.1080/0371750X.2019.1690583
Abstract
Novel Eu3+ doped MGdAl3O7 (M = Mg, Ca, Sr and Ba) phosphors were synthesized and examined. The samples were prepared at 600oC using solution-combustion procedure and investigated at 0.01 to 0.05 mole of dopant ion concentration. The optimal concentration of Eu3+ ions was 0.03 mole for MGdAl3O7 host matrix. On 393 nm excitation, the materials exhibited sharp red emission at 608-614 nm because of 5D07F2 (electric dipole allowed) transition. Structural and phase purity of the materials were determined by X-ray diffraction (XRD) analysis. XRD patterns of the phosphors exhibited single-phase tetragonal structure with P421m space group. Significant rise in the luminous intensity and crystallinity of the materials was observed with increase in temperature. Shape and size of the crystallites were confirmed by transmission electron microscopy (TEM). TEM image displayed spherical crystallites of 14-30 nm size. FTIR spectra of CaGdAl3O7 exhibited various stretching modes at 455, 699 and 776 cm–1 comparable to Ca-O, Gd-O and Al-O. Eu3+ doped MGdAl3O7 could be brilliant materials for applications in white lightemitting diodes, fluorescent panels and modern display devices. [Keywords: Solution combustion, MGdAl3O7:Eu; Luminescent, Tetragonal]
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