Blue-emitting Tm3+-doped Ca9NaGd2/3(PO4)7 phosphor with excellent thermal stability

Research on a new Tm3+-doped NaCa3Bi(PO4)3F blue-emitting phosphor for w-LEDs

“…The 4f-4f transition of 3 H 6 → 1 D 2 of Tm 3+ lead to the 358 nm peak [12]. The electronic dipole transition of 1 G 4 → 3 H 6 of Tm 3+ make a single emission band at 452 nm [13]. Concentration quenching is typically explained by an exchange process and a multipolar interaction distinguished by a critical distance R c .…”

“…The 4f-4f transition of 3 H 6 → 1 D 2 of Tm 3+ lead to the 358 nm peak[12]. The electronic dipole transition of 1 G 4 → 3 H 6 of Tm 3+ make a single emission band at 452 nm[13]. Fig.2(b) exhibits the energy level diagrams of Tm 3+ , which instances the corresponding radiative process.…”

Synthesis and photoluminescence properties of Ba2Y3(SiO4)3F:Tm3+ blue-emitting fluorosilicate phosphors

“…Figure 3 curve (2) displays the emission spectrum of Ba2Y3(SiO4)3F:0.01Tm 3+ at near-UV light λex = 302 nm. The main emission band at 467 nm due to the electronic dipole transition of 1 G4 → 3 H6 of Tm 3+ [20]. Importantly, the emission peaks situated in the blue region suggested that Ba2Y3(SiO4)3F:Tm 3+ can be promising blue emitting phosphors.…”

Preparation and spectroscopic properties of Ca2MgTeO6:Tm3+ blue-emitting tellurate phosphors

“…Rare-earth ions doped tellurates have arisen extensive interest due to excellent chemical and physical stability, such as Li3Gd3Te2O12:Dy 3+ , Ca3TeO6:Eu 3+ , and NaLaCaTeO6:Mn 4+ [10][11][12][13]. Tm 3+ is widely used as an efficient blue light emitting center , such as CaHfO3:Tm 3+ , Li3Gd3Te2O12:Tm 3+ , Ca9NaGd2/3(PO4)7:Tm 3+ , and CaBi4Ti4O15:Tm 3+ ,Yb 3+ many alternative Tm 3+ -doped phosphors have been reported [14][15][16][17]. Ca2MgTeO6 ceramics were reported to a double perovskite family member and exhibited a monoclinic P21/n structure [18].…”