Modifications of structural and optical properties of nanophase BaWO4 phosphors: Dose dependent effect of high energy electron beam irradiation

被引：9
作者：
Stephen, Seenamol K. [1 ,2 ,3 ]
Ganesh, S. [4 ]
Varghese, Thomas [2 ]
机构：
[1] TM Jacob Mem Govt Coll, Dept Phys, Koothattukulam 686662, Kerala, India
[2] Nirmala Coll, Dept Phys, Nanosci Res Ctr NSRC, Muvattupuzha 686661, Kerala, India
[3] Newman Coll Educ, Dept Phys, Thodupuzha 685585, Kerala, India
[4] Mangalore Univ, Dept Phys, Magalagangotri 574199, Karnataka, India
来源：
RADIATION PHYSICS AND CHEMISTRY | 2021年 / 180卷
关键词：
Electron beam irradiation; BaWO4; nanoparticles; Optical studies; Structural studies; Phosphor triangle; CAWO4; PHOTOLUMINESCENCE; TUNGSTATE; GROWTH;
D O I：
10.1016/j.radphyschem.2020.109317
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The present work reports dose dependent influence of 8 MeV electron beam irradiation on the structural and optical properties of BaWO4 nanoparticles fabricated by chemical precipitation route. The synthesized materials were calcined at 400 degrees C for 3 h to get well defined nanocrystalline particles. The calcined materials were irradiated by 8 MeV electron beams of different doses and studied the influence of irradiation on the structural and optical properties of BaWO4 nanoparticles using various characterization tools. The structural studies revealed modifications of lattice parameters a and c, unit cell volume, d spacing, crystallite size, micro-strain, and peak shift for major peaks of X-ray diffraction patterns of the electron irradiated samples. The electron irradiation also results some defects in the crystal lattice of BaWO4 nanocrystals upon electron beam irradiation. Scanning electron microscopic images demonstrated mesoporous behaviour of the BaWO4 materials. The optical studies established that optical bandgap and intensity of photoluminescence emission can be modified by using electron irradiation technique for potential applications in electronics. Photoluminescence emission properties of BaWO4 phosphors suggest that they are useful for the construction of near ultraviolet light excited blue light emitting diodes. Results explored from the present work constitute the first report for the dose-dependent influence of electron beam irradiation on the structure, optical absorption and photoluminescence properties of BaWO4 nanoparticles.
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页数：8
相关论文
共 39 条
[1]   Near-white-emitting phosphors based on tungstate for phosphor-converted light-emitting diodes [J].
Ambast, A. K. ;
Kunti, A. K. ;
Som, S. ;
Sharma, S. K. .
APPLIED OPTICS, 2013, 52 (35) :8424-8431
[2]   Correlation between saturation magnetization, bandgap, and lattice volume of transition metal (M=Cr, Mn, Fe, Co, or Ni) doped Zn1-xMxO nanoparticles [J].
Anghel, J. ;
Thurber, A. ;
Tenne, D. A. ;
Hanna, C. B. ;
Punnoose, A. .
JOURNAL OF APPLIED PHYSICS, 2010, 107 (09) :1019
[3]   INFRARED LATTICE VIBRATIONS IN CALCIUM TUNGSTATE + CALCIUM MOLYBDATE [J].
BARKER, AS .
PHYSICAL REVIEW, 1964, 135 (3A) :A742-+
[4]   New mid IR (1.5-2.2 μm) Raman lasers based on barium tungstate and barium nitrate crystals [J].
Basiev, TT ;
Doroshenko, ME ;
Osiko, VV ;
Sverchkov, SE ;
Galagan, BL .
LASER PHYSICS LETTERS, 2005, 2 (05) :237-238
[5]   Luminescence properties of tungstates and molybdates phosphors: Illustration on ALn(MO4)2 compounds (A = alikaline cation, Ln = lanthanides, M = W, Mo) [J].
Benoit, Glorieux ;
Veronique, Jubera ;
Arnaud, Apheceixborde ;
Alain, Garcia .
SOLID STATE SCIENCES, 2011, 13 (02) :460-467
[6]   Structural refinement, growth process, photoluminescence and photocatalytic properties of (Ba1-xPr2x/3)WO4 crystals synthesized by the coprecipitation method [J].
Cavalcante, L. S. ;
Batista, F. M. C. ;
Almeida, M. A. P. ;
Rabelo, A. C. ;
Nogueira, I. C. ;
Batista, N. C. ;
Varela, J. A. ;
Santos, M. R. M. C. ;
Longo, E. ;
Li, M. Siu .
RSC ADVANCES, 2012, 2 (16) :6438-6454
[7]   Photoluminescent behavior of BaWO4 powders processed in microwave-hydrothermal [J].
Cavalcante, L. S. ;
Sczancoski, J. C. ;
Espinosa, J. W. M. ;
Varela, J. A. ;
Pizani, P. S. ;
Longo, E. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 474 (1-2) :195-200
[8]   Synthesis, Characterization, Anisotropic Growth and Photoluminescence of BaWO4 [J].
Cavalcante, L. S. ;
Sczancoski, J. C. ;
Lima, L. F. ;
Espinosa, J. W. M. ;
Pizani, P. S. ;
Varela, J. A. ;
Longo, E. .
CRYSTAL GROWTH & DESIGN, 2009, 9 (02) :1002-1012
[9]   A systematic study on effect of electron beam irradiation on electrical properties and thermopower of RE0.8Sr0.2CoO3(RE = La, Pr) cobaltites [J].
Christopher, Benedict ;
Thomas, Riya ;
Rao, Ashok ;
Okram, G. S. ;
Petwal, Vikash Chandra ;
Verma, Vijay Pal ;
Dwivedi, Jishnu .
PHYSICA B-CONDENSED MATTER, 2019, 552 :170-177
[10]  
Cullity B.D., 1967, Elements of X-Ray Diffraction
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