title: Synthesis and Photoluminescence Properties of Ca2Ga2SiO7:Eu(3+) Red Phosphors with an Intense (5)D0 → (7)F4 Transition.
abstract: Novel melilite-type Ca2Ga2SiO7:Eu(3+) red-emitting phosphors with different Eu(3+) contents were synthesized via high-temperature solid-state reaction. The crystal structure, optical absorption, and photoluminescence properties were investigated, while density functional theory calculations were performed on the host lattice. The excitation spectra indicate that phosphors can be effectively excited by near-UV light for a potential application in white-light-emitting diodes. Because of the abnormally high intensity emission at about 700 nm arising from the (5)D0 → (7)F4 transition of Eu(3+), the phosphors Ca2Ga2SiO7:Eu(3+) show a deep-red emission with chromaticity coordinates (0.639, 0.358).
authors: Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS , 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3, France.
authors: Gaganpreet Kaur
authors: GK
authors: Behrh
authors: Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS , 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3, France.
authors: Romain
authors: R
authors: Gautier
authors: Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS , 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3, France.
authors: Camille
authors: C
authors: Latouche
authors: Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS , 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3, France.
authors: Stéphane
authors: S
authors: Jobic
authors: Institut des Matériaux Jean Rouxel, Université de Nantes, CNRS , 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3, France.
authors: Hélène
authors: H
authors: Serier-Brault