Intense orange emission in Pr3+ doped lead phosphate glass

Near-infrared quantum cutting luminescence in Pr3+/Yb3+ doped lead bismuth borate glass

“…As it is known, the 2 is related to the covalency of RE ions and ligand anions, which reflects the asymmetry of local environment around the RE ions. The covalency of Pr-O bond, in the studied glass, is stronger than those of zinc-bismuth-borate 29 , lead-phosphate 30 , oxyfluoride 31 , fluorotellurite 32 and silicate 33 glasses, pointing therefore to stronger asymmetry around the RE ion. 4 and 6 are associated to the bulk properties like rigidity and viscosity of hosts.…”

Growth and characterization of Na3R(BO3)2 (R = La–Gd) borates: crystal structure, high-temperature behavior, and optical properties

“…61–64 Other peaks, corresponding to the transitions from 3 P 0 , are also observed: 3 P 0 → 3 H 5 , 3 H 6 , 3 F 2 , 3 F 3 , 3 F 4 at 540, ∼618, 657, ∼720, and 739 nm, respectively. 61,62,65 The attribution of the strongest luminescence peaks and their corresponding electron transitions are related to the praseodymium concentration: both 1 D 2 → 3 H 4 (607 nm) and 3 P 0 → 3 H 5 (∼618 nm) transitions have a dependence on the praseodymium concentration in the crystal. However, the 1 D 2 energy level of Pr 3+ is more sensitive to Pr 3+ concentration than 3 P 0 one; 66–69 thus, for x < 0.1 the maximum intensity is associated with the 1 D 2 → 3 H 4 transition at 607 nm, for x = 0.1, the band corresponding to 3 P 0 → 3 H 6 transition has the maximum intensity, and for x ≥ 0.2, the peak at 657 nm, related to 3 P 0 → 3 F 2 transition, becomes the strongest luminescence peak.…”

“…There is one peak associated with the transition from the 1 D 2 excited state to the 3 H 4 ground state at 607 nm. 61–64 Other peaks, corresponding to the transitions from 3 P 0 , are also observed: 3 P 0 → 3 H 5 , 3 H 6 , 3 F 2 , 3 F 3 , 3 F 4 at 540, ∼618, 657, ∼720, and 739 nm, respectively. 61,62,65 The attribution of the strongest luminescence peaks and their corresponding electron transitions are related to the praseodymium concentration: both 1 D 2 → 3 H 4 (607 nm) and 3 P 0 → 3 H 5 (∼618 nm) transitions have a dependence on the praseodymium concentration in the crystal.…”

Spectroscopic Properties of Inorganic Glasses Doped with Pr3+: A Comparative Study

“…Emission properties of Pr 3+ -doped glasses have been examined at visible wavelengths [11][12][13][14][15][16][17] and the near-infrared (NIR) region [18][19][20][21]. Most published papers are related to luminescence spectroscopy of Pr 3+ ions in glasses belonging to the heavy metal glass family [22][23][24][25][26][27][28]. Special attention has been paid to Pr 3+ ions in silicate glass containing lead [29][30][31].…”