Synthesis and luminescent properties of Dy3+:GAG nanophosphors

Synthesis and photoluminescence characteristics of Dy3+ doped NaY(WO4)2 phosphors

“…The present result indicates that the substitution of Dy 3+ for Y 3+ did not influence the phase and crystal structure of tetragonal NaY(WO 4 ) 2 . This is because the radius of Dy 3+ (0.1027 nm for dodecahedron site) is almost the same as that of Y 3+ (0.102 nm for dodecahedron site), Dy 3+ can easily enter into the eightfold coordination Y 3+ sites of S 4 point symmetry [25,26]. Actually, it is due to the similar radius and properties among lanthanide ions Eu 3+ , Tb 3+ , Dy 3+ , Y 3+ , La 3+ , etc., and the unique structure of double alkaline rare-earth tungstates ARe(WO 4 ) 2 , the high concentration Ln 3+ ions can easily enter into the ARe(MO 4 ) 2 lattice substituting for the Re 3+ cations and keep the single phase of ARe(MO 4 ) 2 .…”

Synthesis and photoluminescence of Tb3+ Activated NaY(WO4)2 phosphors

“…The present result indicates that the substitution of Tb 3+ for Y 3+ did not influence the phase and crystal structure of tetragonal NaY(WO 4 ) 2 . The realization of high Tb 3+ doping content in NaY(WO 4 ) 2 is due to the very nearness of ion radius of Tb 3+ ion (0.104 nm for coordination number 8) and Y 3+ ion (0.102 nm for coordination number 8) [22,23], Tb 3+ can easily enter into the eightfold coordination Y 3+ sites of S 4 point symmetry [24,25]. Additionally, it is observed that with increasing the amount of Tb 3+ , the XRD peaks slightly shift to a lower degree, which means the lattice constants becoming a little bigger.…”

Review. Solvothermal Processes: Definition, Key Factors Governing the Involved Chemical Reactions and New Trends

“…Nanocrystallites well defined in size but with specific morphologies, in particular nanophosphors [83,84], nanotubes [85,86] and nanocomposites [87,88], have attracted great interest in recent years.…”