Size induced modification of boron structural unit in YBO₃: systematic investigation by experimental and theoretical methods

Abstract

Nanocrystalline YBO3 (∼4–8 nm) was prepared using polyol method. It is established that while bulk YBO3 has only BO4 units, its nanoparticles has both BO3 and BO4 units. The BO3 units are primarily distributed on surface on nanoparticles.

Synthesis Conditions on the Nature of GdBO3 Phase Formed

“…In one of our earlier studies on YBO 3 phase, even though the as prepared sample was X‐ray amorphous, well defined selected area electron diffraction (SAED) patterns were observed from the sample. Reasons for obtaining broad peaks in XRD pattern from the sample are small particle size combined with low X‐ray scattering cross‐section of boron structural units.…”

Structural and Luminescence Characterization of Yttrium-Based Red Powder Phosphors

“…It is therefore usually termed YAP (yttrium-aluminum-perovskite) in analogy to YAG (yttrium-aluminum-garnet). Its potential as an efficient laser host has been extensively studied in the past [2][3][4][5][6][7]. In order to facilitate the discussion on the defects responsible for the absorption, exact structural information was required.…”

“…YBO3 compound crystallizes in different structures with different space groups and symmetries [5]. In the monoclinic YBO3 host lattice, two kinds of Y 3+ ions with C1 and Ci crystal symmetries have been reported [6]. Furthermore, YBO3 may have a hexagonal crystal structure with a P63/m space group(176) and Eu 3+ ions which are substituted into Y 3+ sites, have been surrounded by BO3 groups.…”

The luminescence properties of yttria based phosphors and study of YBO3 formation via H3BO3 addition

“…Yttria is widely used in various interesting applications, such as white light emitting diodes [3], photovoltaic cells, up-conversion phosphors [4], lighting, sensors, and optical amplifiers [5]. Meanwhile, the main applications of YBO 3 are display panels, the next generation of flexible display instruments and LEDs [6,7]. Surprisingly, YBO 3 phosphor can be synthesized easily through the addition of boric acid to Y(CH 3 COO) 3 · xH 2 O, but the crystal structure and luminescence characteristics of these two oxides are absolutely different.…”

“…It should be noted that YBO 3 compound crystallizes in different structures with different space groups and symmetries [8,9]. In the monoclinic YBO 3 host lattice, two kinds of Y 3+ ions with C1 and Ci crystal symmetries have been reported [7]. Furthermore, YBO 3 may have a hexagonal crystal structure with a P63/m space group (No.…”