Luminescence properties and energy transfer in Tb3+ and Eu3+ co-doped Ba2P2O7 phosphors. Issue 25 (7th March 2017)

• Record Type: Journal Article
• Authors: Wang, Baoxing; Ren, Qiang; Hai, Ou; Wu, Xiulan
• Is Part Of: RSC advances. Volume 7:Issue 25(2017)
• Page Start: 15222
• Page End: 15227
• Publication Date: 2017-03-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra28122b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The Ba2 P2 O7 :Tb 3+, Eu 3+ phosphors were synthesized by a high temperature solid-state reaction method in air atmosphere and their crystal structures, lifetime, luminescence properties, and energy transfer mechanism were investigated in detail. Abstract : The Ba2 P2 O7 :Tb 3+, Eu 3+ phosphors were synthesized by a high temperature solid-state reaction method in air atmosphere and their crystal structures, lifetime, luminescence properties, and energy transfer mechanism were investigated in detail. A series of characteristic emissions of Ba2 P2 O7 :Tb 3+, Eu 3+ phosphors were observed in the emission spectra at around 545 nm, 593 nm, and 613 nm when excited at 378 nm. The energy-transfer mechanism from Tb 3+ to Eu 3+ in Ba2 P2 O7 is determined by a dipole–dipole interaction. The emission intensity of Ba2− x P2 O7 : x Eu 3+ was enhanced by doping charge compensation Li +, Na + and K + . The CIE coordinates of the phosphors can be tuned from blue-green through white, to yellow and finally to orange-red with changing the Eu 3+ /Tb 3+ ratio. The average decay time of Eu 3+ increases from 2.10 to 5.81 ms with the concentration of Tb 3+ increasing from 2% to 8%, and reaches the maximum at 0.08, and is shortened when the concentration of Tb 3+ goes beyond 8%.