title: Luminescence properties of green-emitting Ca2MgSi2O7:Eu2+ phosphor by a solid-state reaction method.
abstract: A europium (Eu)-doped di-calcium magnesium di-silicate phosphor, Ca2MgSi2O7 :Eu(2+) , was prepared using a solid-state reaction method. The phase structure, particle size, surface morphology, elemental analysis, different stretching mode and luminescence properties were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM) with energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FTIR) spectroscopy, photoluminescence (PL) and mechanoluminescence (ML). The phase structure of Ca2MgSi2O7:Eu(2+) was an akermanite-type structure, which belongs to the tetragonal crystallography with space group P4̅21 m; this structure is a member of the melilite group and forms a layered compound. The surface of the prepared phosphor was not found to be uniform and particle distribution was in the nanometer range. EDX and FTIR confirm the components of Eu(2+)-doped Ca2MgSi2O7 phosphor. Under UV excitation, the main emission peak appeared at 530 nm, belonging to the broad emission ascribed to the 4f(6) 5d(1) → 4f(7) transition of Eu(2+). The ML intensity of the prepared phosphor increased linearly with increasing impact velocity. A CIE color chromaticity diagram and ML spectrum confirmed that the prepared Ca2MgSi2O7:Eu(2+) phosphor would emit green color and the ML spectrum was similar to that of PL, which indicated that ML is emitted from the same center of Eu(2+) ions.
authors.affiliation: School of Studies in Physics & Astrophysics, Pt. Ravishankar Shukla University, Raipur, India.
authors.forename: Ishwar Prasad
authors.initials: IP
authors.lastname: Sahu
authors.affiliation: School of Studies in Physics & Astrophysics, Pt. Ravishankar Shukla University, Raipur, India.
authors.forename: D P
authors.initials: DP
authors.lastname: Bisen
authors.affiliation: School of Studies in Physics & Astrophysics, Pt. Ravishankar Shukla University, Raipur, India.
authors.forename: Nameeta
authors.initials: N
authors.lastname: Brahme
mesh_terms: D002118:Calcium / Q000737:chemistry*; D003116:Color; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D008274:Magnesium / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010316:Particle Size; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D005063:Europium; D008274:Magnesium; D010100:Oxygen; D002118:Calcium; D012825:Silicon
keywords: Ca2MgSi2O7:Eu2+; FTIR; XRD; mechanoluminescence; photoluminescence