Optical Studies of Pr3+ Doped Oxyfluoroborate Glass

Full color photoluminescence of Tb3+/Sm3+ codoped oxyfluoride aluminosilicate glasses and glass ceramics for white light emitting diodes

“…1 shows the emission spectra of glass samples with different CaF 2 contents excited by a 374 nm UV light. The emission bands corresponding to Tb 3+ and Sm 3+ ions are in agreement with other systems [13,14]. The Tb 3+ emission bands centered at 414 nm, 435 nm (purple), 487 nm (blue) and 541 nm (green) are ascribed to 5 D 3 → 7 F 5 , 5 D 3 → 7 F 4 , 5 D 4 → 7 F 6 and 5 D 4 → 7 F 5 transitions, respectively [13].…”

“…The Tb 3+ emission bands centered at 414 nm, 435 nm (purple), 487 nm (blue) and 541 nm (green) are ascribed to 5 D 3 → 7 F 5 , 5 D 3 → 7 F 4 , 5 D 4 → 7 F 6 and 5 D 4 → 7 F 5 transitions, respectively [13]. The Sm 3+ emissions peaked at 562 nm (green), 598 nm (orange-red), and 645 nm (red) can be assigned to the 4 G 5/2 → 6 H J/2 (J = 5, 7, 9) transitions [14]. The 5 D 4 → 7 F 4 and 5 D 4 → 7 F 3 transitions of Tb 3+ ions are common in other studies but were not observed in the present Tb 3+ /Sm 3+ codoped samples probably due to the overlap with the tail of Sm 3+ emissions peaked at 598 nm, respectively [15].…”

Studies of the spectroscopic properties of lead–gallium oxyfluoride (LGOF) glasses and glass–ceramics activated by Pr 3+ ions

“…showing distinct peaks at 16180 cm -1 (618 nm) and 15430 cm -1 (648 nm) corresponding to 1 D 2  3 H 4 + 3 P 0  3 H 6 and 3 P 0  3 F 2 transitions, respectively, [17,18] and lower band around 13000 cm -1 -15000 cm -1 (770 nm -~ 670 nm) being the evidence of the 3 P J  3 F 4 transitions [17]. The above ascriptions have been assumed taking into account a value of the highest energy phonon ħ  900 cm -1 [16], which allows both the states: 3 P 0 and 1 D 2 for being populated and giving rise to the observed emission peaks.…”

Structural, absorption and fluorescence spectral analysis of Pr3+ ions doped zinc bismuth borate glasses

“…These fluorescence peaks are assigned to 3 P 0 → 3 H 4,6, 3 P 0 → 3 F 2,3 and 1 D 2 → 3 H 6 transitions, respectively. The assignment of the peaks to specific transitions have been made on the basis of known energy levels of Pr 3+ ions as reported by Dieke [36] and earlier workers [10,11]. The first and most interesting observation is that the intensity of the fluorescence peak at 493 nm corresponding to 3 P 0 → 3 H 4 transition increases with increasing Bi 2 O 3 concentration.…”

“…Laser action has been observed for 1 D 2 → 3 H 4 transition [5][6][7] of the Pr 3+ ions. Pr 3+ ions doped alkali bismuth gallate [8], TeO 2 -LiF [9], lithium borate, lithium fluoro-borate [10] and oxyfluoro-borate [11] glasses have been studied. Pr 3+ doped heavy metal oxide glasses such as germanate, lead oxide, bismuth oxide and tellurite glasses have proved to be effective for several practical applications [12] because of their high refractive index, high transmittance for infrared radiation and high chemical stability.…”