Luminescence of manganese(II) in 24 phosphate glasses

Optical properties of manganese in barium phosphate glasses

“…P 2 O 5 or NH 4 tained at this temperature for 1 h to decompose the phosphorus pentoxide leading to the release of ammonia and water. The material was then heated to temperatures in the range of 1100-1300°C, and kept at these temperatures for 0.5-2 h, for the liquid homogenization.…”

“…This experiment involved an oxidation of Mn 2+ to Mn 3+ in Mn-Fe ions co-doped silicate glasses. On the other hand, surprisingly large quantum efficiencies of Mn 2+ luminescence at room temperature were reported in phosphate glasses [4]. Besides that, Mn 3+ luminescence has been observed in both silicate and borate glasses [5].…”

Spectroscopic and dielectric studies on MnO doped PbO–Nb2O5–P2O5 glass system

“…has also been reported from our laboratory in recent years [7][8][9]. Though Zn 2 SiO 4 crystal is considered as the most suitable host for manganese doping for the luminescence emission [10,11], recently the lasing action of Mn 2+ ions has also been observed in some of the inorganic glasses [12][13][14][15] including phosphate glasses with large quantum luminescence efficiencies even at room temperature. The studies on up conversion emission with manganese ion as sensitizer and rare-earth ions as activators in some phosphate glasses have also been reported earlier [16][17][18].…”

Preparation of Mn2+‐Cu+ co‐doped P2O5–ZnO–Al2O3 glasses and their red fluorescence properties

“…[3][4][5][6][7] Among them, Mn 2+ -doped phosphate glasses that show strong, broad, and red fluorescence bands due to the 4 T 1g → 6 A 1g transition of Mn 2+ ions under violet light of wavelength 410 nm, are candidates for red phosphors. 6,7 We have already reported that the P 2 O 5 -35ZnO-5Al 2 O 3 -8MnO (mole ratio) with improved water-resistance due to added Al 2 O 3 , emits the strong, broad, and red fluorescence without concentration quenching under the excitation of violet LEDs (405-415 nm). 8 However, when this red phosphor glass is combined with a violet LED chip in a method similar to making white LED, a problem occurs in the color tone because of the mixing of the red fluorescence with the blue light.…”