Synthesis and energy transfer studies of LaMgAl11O19:Cr3+, Nd3+ phosphors

Site occupancy and enhanced luminescence of broadband NIR gallogermanate phosphors by energy transfer

“…To enhance the luminescence performance of phosphors, energy transfer is widely adopted . Up to now, Cr 3+ was generally used as a sensitizer (Cr 3+ →Nd 3+ /Yb 3+ ). For example, Liu et al reported YAl 3 (BO 3 ) 4 : Yb 3+ with improved luminescence intensity by Cr 3+ co‐doping, after energy transfer, the Yb 3+ acceptors exhibited stronger NIR emission centered at around 1000 nm.…”

Insight into luminescent properties, energy transfer and thermal stability of NaBa4(AlB4O9)2Cl3:Ce3+, Tb3+ phosphors

“…As one way to meliorate single‐phase phosphors, introducing couple activators into one host lattice has been on trial in order to take benefit from the advantage of transferring energy in the co‐doping system. With dramatic enhancement on the emission intensity of activators, energy transfer process has been investigated widely in broad selection of co‐doping ions including Ce 3+ /Eu 2+ , Ce 3+ /Mn 2+ , Eu 2+ /Mn 2+ , Eu 2+ /Tb 3+ , Cr 3+ /Nd 3+ , etc Nevertheless, among all kinds of co‐activators, co‐doping Ce 3+ /Tb 3+ has demonstrated its value as well with a combined blue‐green emission and the energy transfer process within . As an activator, Tb 3+ ion is known for its green emission peaking around 544 nm under n‐UV excitation due to its main 5 D 4 ‐ 7 F 5 transition .…”

Near-infrared Sr7NaGa(PO4)6:Cr3+,Ln3+ (Ln = Nd, Er, and Yb) phosphors with different energy transfer paths: photoluminescence enhancement and versatility

“…At present, some NIR phosphors have been reported such as Ca 3 Sc 2 Si 3 O 12 :Cr 3+ , LiGaP 2 O 7 :Cr 3+ , Ca 2 LuScAl 2 Si 2 O 12 :Cr 3+ , LaMgAl 11 O 19 :Cr 3+ ,Nd 3+ /Yb 3+ , Ca 3 Ga 2 Ge 3 O 12 :Cr 3+ ,Nd 3+ , Ba 2 LaGa 11 O 20 :Cr 3+ ,/Nd 3+ /Yb 3+ , LaGaO 3 :Cr 3+ ,Yb 3+ /Nd 3+ /Er 3+ , La 3 LuGa 4 O 12 :Cr 3+ ,Nd 3+ , and LiScP 2 O 7 :Cr 3+ ,Yb 3+ . 12,16,29–35 The Sr 9 Ga(PO 4 ) 7 :Cr 3+ and Sr 9 Cr(PO 4 ) 7 :Yb 3+ phosphors have been reported by Liu's work; 36,37 the work reported that the structure confinement of Sr 9 M(PO 4 ) 7 (M = Ga and Cr) can enhance the luminescence properties of the NIR phosphors. In the Sr 9 Cr(PO 4 ) 7 :Yb 3+ phosphors, the energy transfer between Cr 3+ and Yb 3+ has been studied in detail.…”

“…[26][27][28] Ln 3+ and Cr 3+ ion co-doped NIR phosphors can combine the advantages of both the ions to reduce non-radiative transition, improve the performance of NIR phosphors and increase their application potential. At present, some NIR phosphors have been reported such as Ca 3 Sc 12,16,[29][30][31][32][33][34][35] The Sr 9 Ga(PO 4 ) 7 :Cr 3+ and Sr 9 Cr(PO 4 ) 7 :Yb 3+ phosphors have been reported by Liu's work; 36,37 the work reported that the structure confinement of Sr 9 M(PO 4 ) 7 (M = Ga and Cr) can enhance the luminescence properties of the NIR phosphors. In the Sr 9 Cr(PO 4 ) 7 :Yb 3+ phosphors, the energy transfer between Cr 3+ and Yb 3+ has been studied in detail.…”