Synthesis and Growth of Rare Earth Borates NaSrR(BO₃)₂ (R = Ho–Lu, Y, Sc)

Abstract

NaSrR(BO 3 ) 2 (R = Ho−Lu, Y, Sc) compounds were obtained for the first time. Their structures exhibit disordered positions of Sr 2+ and Na + atoms while RO 6 polyhedra are connected through the BO 3 groups. Large distances between R atoms and high transparency in the range of 250−900 nm make them promising for phosphor applications. A pathway to obtain single crystals was shown by growing NaSrY(BO 3 ) 2 and NaSrYb-(BO 3 ) 2 by the top seeded solution growth method with Na 2 O-B 2 O 3 -NaF flux.

Growth and characterization of Na3R(BO3)2 (R = La–Gd) borates: crystal structure, high-temperature behavior, and optical properties

“…Actually, the same behavior was shown for the NaSrY(BO 3 ) 2 phase transition in our recent work. 20 The amount of the Na 3 Nd 2 (BO 3 ) 3 phase increases with the temperature from ∼15 (at 980 °C) to ∼40 vol% (at 1040 °C). The phase composition of this sample at room temperature after cooling can be also described by the coexistence of two phases mentioned above with the 2 : 1 ratio, where 2 corresponds to the initial Na 3 Nd(BO 3 ) 2 phase.…”

“…7–11 A large number of articles describe luminescent and nonlinear optical materials, which are devoted to the study of REE-containing and/or REE-doped borate compounds, showing the potential of their application in optoelectronic circuits and devices. 12–21 One of the most significant families of such compounds are represented by alkaline borates and REE-containing alkaline borates. 22–29…”

“…[7][8][9][10][11] A large number of articles describe luminescent and nonlinear optical materials, which are devoted to the study of REE-containing and/or REE-doped borate compounds, showing the potential of their application in optoelectronic circuits and devices. [12][13][14][15][16][17][18][19][20][21] One of the most significant families of such compounds are represented by alkaline borates and REE-containing alkaline borates. [22][23][24][25][26][27][28][29] Nowadays lithium-, sodium-, and potassium-containing borates with REE ions attract increasing attention due to their low cost, low formation reaction temperature, excellent optical properties, and considerably high physicochemical stability.…”

Wide-band excited and deep-red sensitized Mn2+ emission from an NaSrSc(BO3)2:Eu2+,Mn2+ phosphor with vanished Eu2+ emission

“…Borates are suitable oxide hosts for phosphors because of their merits like high stabilities, diverse structures and optical transparency. 16–18 As reported by Kuznetsov, NaSrSc(BO 3 ) 2 exhibits a structure of disordered positions of Sr 2+ and Na + atoms, while ScO 6 polyhedra are connected through the BO 3 groups, which are suitable for rare-Earth/transition-metal incorporation and functionalization. To the best of our knowledge, no such NaSrSc(BO 3 ) 2 -based phosphors, or their photoluminescence, has been reported in the literature.…”

“…This result shows that all patterns have a good match with the reported NaSrSc(BO 3 ) 2 data from ref. 18, indicating that the synthesized phosphor is of single phase and the Eu 2+ , Mn 2+ is successfully incorporated into the lattice.…”