Synthesis and photoluminescence properties of a novel double perovskite Ca2LaSbO6:Sm3+ phosphor for w-LEDs

Efficient and zero thermal quenching Sm3+-activated Li2LaTiTaO7 phosphor for white LEDs

“…The Sm 3d 3/2 and Sm 3d 5/2 binding energies were located at ∼1110.2 and ∼1082.5 eV, respectively. 27,28…”

“…The other peaks located at 346, 363, 377, 390, 407, 419, 441, 466, and 480 are ascribed to the 6 H 5/2 → 4 H 9/2 , 6 H 5/2 → 4 D 3/2 , 6 H 5/2 → 6 P 7/2 , 6 H 5/2 → 4 L 15/2 , 6 H 5/2 → 4 F 7/2 , 6 H 5/2 → 6 P 5/2 , 6 H 5/2 → 4 G 9/2 , 6 H 5/2 → 4 I 11/2 , and 6 H 5/2 → 4 I 9/2 transitions of Sm 3+ ions, respectively. 27,28,38 The strongest transition among these peaks is at 407 nm, suggesting that the LLTT:Sm 3+ phosphors have potential applications in NUV-based LEDs. The phosphor exhibits four emission peaks at 563, 597, 643, and 706 nm when excited at 407 nm, which are ascribed to the 4 G 5/2 → 6 H J ( J = 5/2, 7/2, 9/2, 11/2) transitions of Sm 3+ ions (shown in Fig.…”

“…18,19 Recently, Sm 3+ -doped phosphors have caused concerns in w-LEDs, such as KBaY(MoO 4 ) 3 :Sm 3+ , Ca 2 ZnSi 2 O 7 :Sm 3+ , NaSrLa(MoO 4 )O 3 :Sm 3+ , LiSrVO 4 :Sm 3+ , Ca 2 InSbO 6 :Sm 3+ , NaCaTiTaO 6 :Sm 3+ , Ca 2 GdNbO 6 :Sm 3+ , Ca 2 LaNbO 6 :Sm 3+ , Ca 2 LaSbO 6 :Sm 3+ , Ca 5 (PO 4 ) 2 SiO 4 :Sm 3+ , NaKLaNbO 5 :Sm 3+ , and Sr 2 TiO 4 :Sm 3+ . 20–31…”

Rare-earth and transition metal ion single-/co-doped double-perovskite tantalate phosphors: Validation of suitability for versatile applications

“…CaGd2HfSc(AlO4)3:Ce 3+ (27% at 423 K, ΔE = 0. 29 eV) [57], Ca2LaSbO6:Sm 3+ (59.04% at 423 K, ΔE = 0.2689 eV) [58], and Sr2InSbO6:Sm 3+ ( 5.8% at 523 K, ΔE = 0.32 eV) phosphors [59]. So, the directly effective method for better investigating thermal stability is to compare the temperature-dependent emission intensity.…”

Red and near-infrared emitting phosphors based on Eu3+- or Nd3+-doped lanthanum niobates prepared by the sol–gel route

“…Rare earth-doped materials have attracted considerable attention in recent years. They constitute promising hosts for technological applications in optical amplifiers, [1][2][3][4] solar cells, [5][6][7][8] lightemitting diodes (LEDs), [9][10][11][12][13][14][15] solid-state lasers, [16][17][18] up-conversion materials, [19][20][21] photonic devices, [22][23][24] nanothermometers, [25][26][27] and biomarkers for nanomedicine. [28][29][30][31] In the illumination and energy fields, white light-emitting diode (w-LED) devices are expected to become a major light source in the coming decades: w-LEDs present a long lifetime as well as high illumination efficiency and brightness, are reliable and environmentally friendly, provide flexible color mixing, and have a small volume, just to mention some of their outstanding advantages.…”