Unravelling the energy transfer mechanism in bismuth co-activation of LaInO₃:Sm³⁺/Ho³⁺ nanophosphor for color-tunable luminescence

Abstract

A series of single-phased and color tunable LaInO3:Bi3+,Ho3+/Sm3+ nano phosphors were synthesized via a cost effective and low temperature chemical route.

Tunable luminescence from Bi3+ sensitized La2Zr2O7:Eu3+ red nanophosphors for display applications

“…In addition, it is found that, there is a decrease in grain size of doped and codoped samples in comparison with that of undoped sample which may be due to grain growth inhibition during sample preparation. [ 39 ] Additionally, using ImageJ software, it was found that the agglomerates average grain size was around 80 nm, as shown in Figure 3.…”

Blue to magenta tunable luminescence from LaGaO3: Bi3+, Cr3+ doped phosphors for field emission display applications

“…The average bond length of Ga-O in GaO 6 is 1.975 A; while La 3+ is 8-coordinated by O atoms with average bond length of 2.62 A for La-O. The minor changes in lattice parameters of single doped Bi 3+ , Cr 3+ and co-doped in LaGaO 3 when compared with undoped LaGaO 3 depends on ionic radii 22. The radius of Bi 3+ (r ¼ 1.03 A, coordination number, CN ¼ 6) is similar to that of La 3+ (r ¼ 1.16 A, CN ¼ 8), while the radius of Cr 3+ (r ¼ 0.61 A, CN ¼ 6) is comparable to that of Ga 3+ (r ¼ 0.47 A, CN ¼ 6),27 thus in Bi 3+ -Cr 3+ co-doped LaGaO 3 , Bi 3+ mostly likes to take La site and Cr 3+ likes to take Ga site.…”

“…Research reports also show that along with Eu 2+ , Ce 3+ ; Bi 3+ could be used as sensitizer ion to produce abundant and tunable emission colors including white via adjusting doped ion concentrations. [18][19][20][21][22] Trivalent chromium (Cr 3+ ) is widely used as a luminescent dopant in various materials. Chromium is a low-cost activator, which can provide deep red color and bright luminescence.…”

Plasma oxidation of liquid precursors for complex metal oxides.

“…However, low initial cost outlay and low production risk (defective batch can easily be identified and disposed of) are some of the advantages of batch process. The batch processes currently in place for complex oxide preparation are solvothermal 141 , sol-gel 142 , polyol [143][144] , solid-state reaction 145 . In stark contrast, however, starting materials pass through unit operation/unit process in a repeated and uninterrupted manner in continuous processing.…”