Luminescent properties of a novel red-emitting phosphor: Eu3+-activated Ca3Sr3(VO4)4

Photoluminescence properties of (Ba1−xEux)WO4 red synthesized by the coprecipitation/calcination method

“…Thus, the red phosphor (Ba 1−x Eu x )WO 4 has excellent absorption ability in near-UV, blue and green light, especially the near-UV and blue light have a good absorption, which can be excited by the commercial near-UV (394 nm) and blue LED chips (465 nm). [14,15]. The strongest red emission is located at 612 nm attributing to electric dipole transition 5 D 0 → 7 F 2 of Eu 3+ ion, while the weak orange emission located around 590 nm is belonging to the magnetic dipole transition 5 D 0 → 7 F 1 .…”

The luminescence spectroscopy and thermal stability of red-emitting phosphor Ca9Eu(VO4)7

“…Usually, vanadate compounds have broad and intense charge transfer (CT) absorption bands from oxygen to metal ions in the near UV wavelength region. Under UV excitation, the CT band of vanadate host can transfer the excitation energy to the luminescent center by a nonradiative transition process [11].…”

Energy transfer and colorimetric properties of Eu3+/Dy3+ co-doped Gd2(MoO4)3 phosphors

“…This broad band can be assigned to both the contributions from Mo-O and Eu-O charge transfer transitions. The several intense narrow lines peaking at 394, 465, 535 nm are related with f-f transitions of Eu 3+ from ground state 7 F 0 to 5 L 6 , 5 D 2 and 5 D 1 states, respectively [20]. The other weak narrow lines can be assigned to the same f-f transitions of Dy 3+ as shown in Fig.…”