Luminescent properties of novel red-emitting phosphor: Gd<sub>2</sub>O<sub>2</sub>CN<sub>2</sub>:Eu<sup>3+</sup> - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Optical Materials Express Année : 2015

Luminescent properties of novel red-emitting phosphor: Gd2O2CN2:Eu3+

Résumé

Eu3+-doped Gd2O2CN2 was firstly synthesized by a classical solid-state reaction of Li2CO3, Eu2O3 and GdF3 under NH3 gas flow in the presence of graphite at low firing temperature. Powder X-ray diffraction (XRD) analysis indicated that Gd2O2CN2: Eu3+crystallizes in a trigonal-type structure with space group P-3m1. Gd2O2CN2: Eu3+ shows a sharp red emission band peaking at 626 nm under excitation at 300 nm at room temperature. PL spectra indicates that Eu3+ doped Gd2O2CN2 samples emit the typical emission peaks at 614 nm and 626 nm originated from the hypersensitive electric dipole transition (5D0→7F2) of Eu3+ ions. The optimized doping concentration of Eu3+ ions was found to be 7.5 at. %, and the critical transfer distance was calculated to be 10.907 Å.

Domaines

Chimie Matériaux
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Dates et versions

hal-01218122 , version 1 (28-10-2015)

Identifiants

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Luting Wang, Shuanglong Yuan, Yunxia Yang, François Cheviré, Franck Tessier, et al.. Luminescent properties of novel red-emitting phosphor: Gd2O2CN2:Eu3+. Optical Materials Express, 2015, 5 (11), pp.2626-2624. ⟨10.1364/OME.5.002616⟩. ⟨hal-01218122⟩
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