The red luminescence characteristics of fully concentrated Eu‐based phosphor EuBaB₉O₁₆

Abstract

The red phosphor EuBaB 9 O 16 was prepared by the conventional solid-state reaction method. The crystallite phase of the phosphor was observed by X-ray diffraction (XRD) patterns. Scanning electron micrographs were obtained to study the morphologic features and the particle size of the phosphor. The photoluminescence (PL) excitation and emission spectra, temperature dependence of luminescence intensity and the decay curves were investigated. The phosphor, when excited with near-UV wavelength radiation, exhibited an intense red luminescence. The characteristic emission of Eu 3þ ions corresponding to the electric dipole transition 5 D 0 ! 7 F 2 was located at 613 nm under 254-and 365-nm excitation. Its room temperature fluorescent decay profile exhibits a singleexponent shape with a decay time of 2.03 ms. The color coordinates were also discussed. In addition, the PL properties of EuBaB 9 O 16 were compared with those of La 0.9 Eu 0.1 BaB 9 O 16 and Gd 0.9 Eu 0.1 BaB 9 O 16 .

Approaching the structure of REBaB9O16 (RE = rare earth) by characterization of a new analogue Ba6Bi9B79O138

“…As shown in Fig. [9][10][11][12][13][14][15][16][17] Especially, the local coordination environment of RE 3+ ions have been investigated by using Eu 3+ -luminescence as a structural probe. It is understandable due to the close ionic radii for Bi 3+ and Eu 3+ .…”

“…4a, no observable impurity peaks were found in powder XRD patterns, where the refection peaks show a slight shift. 11,16,17 For example, the presence of a strong 5 D0→ 7 F2 emission usually indicates that the coordination environment of Eu 3+ is deviated from inversion symmetry. The slight difference in cell lattice parameters, including a, c and V, can be verified by Le Bail refinements as summarized in Table S3 in ESI, and the unit cell volumes along with the increase of x is shown in Fig.…”

“…9,10 This series of borates contains two types of cations, RE 3+ and M 2+ . 16,17 These materials have potential applications in white light-emitting diodes (WLED), 17 tricolor lamps, 11,18 plasma display panels (PLD) under VUV excitation 4,19 and as well as laser materials. 11 Massive efforts have been devoted to investigate the PL properties of REBaB9O16, such as REMB9O16:Tb 3+ , Ce 3+ (RE = La, Gd, and Y, M = Sr or Ba), 9 REBaB9O16:Eu 3+ , 4,10-12 GdBaB9O16:RE (RE = Gd, Sm, Dy, Pr, Nd), 3,[13][14][15] and EuBaB9O16.…”

Ba6(Bi1−xEux)9B79O138 (0 ≤ x ≤ 1): synergetic changing of the wavelength of Bi3+ absorption and the red-to-orange emission ratio of Eu3+

“…6,7 REMB 9 O 16 (RE = rare earth, M = Sr or Ba) is a series of wellknown phosphor hosts with the advantage of containing two types of cations, RE 3+ and M 2+ . 19,20 These materials potentially have applications in white light-emitting diodes (WLED), 20 tricolour lamps, 11,21 plasma display panels (PLD) under VUV excitation, 13,22 and laser materials. [10][11][12] Massive efforts have been devoted to investigate the photoluminescent (PL) properties of phosphors such as REMB 9 O 16 :Tb 3+ , Ce 3+ (RE = La, Gd, and Y, M = Sr or Ba), 9 REBaB 9 O 16 :Eu 3+ (RE = La, Gd, and Y), 10,11,13,14 GdBaB 9 O 16 :RE (RE = Gd, Sm, Dy, Pr, and Nd), [15][16][17][18] LaBaB 9 O 16 :M (M = Bi 3+ , Mn 2+ ), 12 and EuBaB 9 O 16 .…”

Hydrothermal synthesis and photoluminescence properties of Eu3+ doped Na4La2(CO3)5 rod-like nanophosphors

“…This kind of phosphor is very favorable to suffer from high photon flux during its application without many luminescence quenching. It has been found that some Eu 3 þ compounds show no luminescence quenching, such as Eu 3 BWO 9 [17], K 3 Eu(VO 4 ) 2 [18], Eu 2 WO 6 [19], EuBaB 9 O 16 [20].…”