Synthesis, second-harmonic generations (SHG), and photoluminescence (PL) properties of Ca(4)Bi(6-x)Ln(x)O(13) (Ln=La and Eu) solid solutions
- Authors
- Jung, Hoyong; Jo, Hongil; Oh, Seung-Jin; Ok, Kang Min
- Issue Date
- Aug-2017
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- Solid state synthesis; Structures; Solid solutions; Second-harmonic generation; Photoluminescence
- Citation
- JOURNAL OF SOLID STATE CHEMISTRY, v.252, pp 28 - 32
- Pages
- 5
- Journal Title
- JOURNAL OF SOLID STATE CHEMISTRY
- Volume
- 252
- Start Page
- 28
- End Page
- 32
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/4113
- DOI
- 10.1016/j.jssc.2017.05.003
- ISSN
- 0022-4596
1095-726X
- Abstract
- Noncentrosymmetric (NCS) Ca(4)Bi(6-x)Ln(x)O(13) (Ln=La and Eu; x=0, 0.06, and 0.12) solid solutions have been synthesized through conventional solid state reactions by using CaCO3, Bi2O3, and Ln(2)O(3). Crystal structures of the reported materials have been determined by powder X-ray diffraction using Rietveld method. Ca(4)Bi(6-x)Ln(x)O(13) solid solutions crystallizing in the polar NCS space group, C2mm (No. 38), are composed of unidimensional bands with BiO3 and BiO5 polyhedra. Second-harmonic generation (SHG) measurements, using 1064 nm radiation, indicate that Ca(4)Bi(6-x)Ln(x)O(13) solid solutions are type-I phase-matchable and reveal moderate SHG efficiencies ranging from 30 to 80 times that of alpha-SiO2. Detailed structure-SHG property relationship analyses suggest that the net moment arising from the alignment of the asymmetric polyhedra of the lone pair cation, Bi3+ in Ca(4)Bi(6-x)Ln(x)O(13) solid solutions is critical for the observed SHG phenomena. Photoluminescence (PL) properties measurements on Ca4Bi6-xEuxO13 solid solutions reveal the characteristic narrow emission lines attributable to D-5(0)-> F-7(j) (j=4, ..., 0) transitions and confirm the unsymmetrical coordination environment of the doped-Eu3+ cation sites. Further PL measurements at different temperatures suggest that while Ca4Bi6-xEuxO13 exhibit the nonradiative emissions at high temperatures, the solid solutions show the radiative emissions with strong intensities at low temperatures.
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