Controlled preparation of undoped Zn2GeO4 microcrystal and the luminescent properties resulted from the inner defects

Controllable synthesis and morphology-dependent light emission efficiency of Zn2GeO4 nanophosphors

“…These emission contributions are very close to the ones reported for microrods, which have overall higher dimensions (1-2 microns wide and hundreds of microns length), 16 and rather distinct from Zn 2 GeO 4 nanoparticles, nanowires and Zn 2 GeO 4 in bulk form. 17,18,35 Particularly, the aspect ratio between the microrods prepared in our previous work 16 and these nanorods is rather similar, but their overall dimensions are entirely distinct. Nevertheless, the nanoparticle size of the sample we synthesized in a previous paper 18 (10 or 16 nm in average) is comparable to some of our nanorods, but with an aspect ratio close to 1 : 1.…”

“…These emission contributions are very close to the ones reported for microrods, which have overall higher dimensions (1–2 microns wide and hundreds of microns length), 16 and rather distinct from Zn 2 GeO 4 nanoparticles, nanowires and Zn 2 GeO 4 in bulk form. 17,18,35…”

Enhanced Photocatalytic and Photoluminescence Properties Resulting from Type-I Band Alignment in the Zn2GeO4/g-C3N4 Nanocomposites

“…Other bands observed in the range of 3000 cm −1 to 3500 cm −1 correspond to the O-H and N-H stretching of adsorbed water molecules and free amino groups, respectively [31,[38][39][40]. Moreover, small peaks that show up only in the composites, at approximately 530 cm −1 and 750 cm −1 , are attributed to the O-Zn-O and O-Ge-O stretching vibrations, respectively, of Zn 2 GeO 4 [41][42][43].…”

“…450 nm and 488 nm) can be attributed to π*→ LP and π*→π transitions of g-C 3 N 4 [31,44], while the single shoulder at ca. 532 nm is due to the oxygen vacancy (Vo) as well as the hybridization of 4s and 4p orbital states in the Zn and Ge belonging to Zn 2 GeO 4 [43,[45][46][47]. No major change occurred in the PL emission profile, except in terms of its intensity.…”

Anti-Defect engineering toward high luminescent efficiency in whitlockite phosphors

“…[27] Several examples of a significant performance enhancement can be found in phosphors, photocatalytic materials, and photovoltaic materials. [28][29][30] Obviously, effective defect engineering, through accurately introducing or manipulating specific species of defects, should be an essential method to achieve required properties in luminescent materials. [31] Nevertheless, the understanding on the effects of specific defects on the optical performance in phosphors is limited.…”