Luminescence properties of a novel orange–red CaBi2B2O7:Eu3+ phosphor for near-UV pumped W-LEDs

Synthesis and photoluminescence properties of a novel blue-emitting phosphor Ca3TeO6 co-doped with Tm3+, Na+

“…And the 359 nm peak is due to the characteristic 4f-4f transition of 3 H 6 → 1 D 2 of Tm 3+ [15]. As for the emission curve, due to the 1 G 4 → 3 H 6 the electronic dipole transition Tm 3+ emits a single emission band at 454 nm [16]. The energy level graph of Tm 3+ is displayed in Fig.…”

Luminescence properties of Eu2O3-doped ZrO2–Y2O3 single crystals

“…Thus, the bottom of the conduction band moves to a lower energy as the Eu 3+ concentration is increased. 34–36…”

“…These consist of a broad band between 225 and 308 nm, which corresponds to a charge transfer (CT) transition from a filled concentration is increased. [34][35][36] The assignments of the Eu 3+ transitions shown in Fig. 6(a) are 532 nm ( 7 F 1 → 5 D 1 ), 524 nm ( 7 F 0 → 5 D 1 ), 463 nm ( 7 F 0 → 5 D 2 ), 412 nm ( 7 F 1 → 5 D 3 ), 403 nm ( 7 F 1 → 5 L 6 ), 393 nm ( 7 F 0 → 5 L 6 ), 380 nm ( 7 F 1 → 5 L 7 ), 360 nm ( 7 F 0 → 5 D 4 ), and 317 nm ( 7 F 0 → 5 H 6 ).…”

Effect of Mg doping in Sr2SiO4:Eu2+ nanophosphors for blue and white emission at near‐UV excitation

“…The utilization of near ultraviolet (UV) radiation as an excitation source for a blue emitting phosphor is beneficial as the human eye is not very sensitive to the wavelengths range from 380 to 400 nm and also, the utilization of near‐UV excitation source for blue emission will provide greater efficiency because Stoke's shift is small; hence lesser energy is converted into heat . Therefore, the use of phosphors that can be excited in the near‐UV region is the basis of research nowadays …”