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DC conductivity, optical properties and Judd-Ofelt evaluation of 20Li2O-xBi2O3-(78-x)TeO2-1Er2O3-1Ag mixed ionic-electronic glasses
被引:6
作者:
Sutrisno, M. S.
[1
,3
]
Sazali, E. S.
[2
]
Azlan, M. N.
[4
]
Kamil, S. A.
[1
]
Hisam, R.
[1
]
机构:
[1] Univ Teknol MARA, Fac Appl Sci, Shah Alam 40450, Selangor, Malaysia
[2] Univ Teknol Malaysia, Fac Sci, Adv Opt Mat Res Grp, Johor Baharu 81310, Malaysia
[3] Univ Cyberjaya UoC, Persiaran Bestari, Cyber 11, Cyberjaya 63000, Selangor, Malaysia
[4] Univ Pendidikan Sultan Idris, Jabatan Fizik, Fak Sains dan Matemat, Tanjung Malim 35900, Perak, Malaysia
来源:
MATERIALS TODAY COMMUNICATIONS
|
2022年
/
31卷
关键词:
Energy bandgap;
Judd-Ofelt;
Mixed ionic-electronic glass;
DC conductivity;
CONCENTRATION-DEPENDENT LUMINESCENCE;
NON-BRIDGING OXYGEN;
SPECTROSCOPIC PROPERTIES;
TELLURITE GLASSES;
UP-CONVERSION;
OXIDE GLASS;
SM3+ IONS;
TRANSITION-PROBABILITIES;
DIELECTRIC-PROPERTIES;
INTENSITY PARAMETERS;
D O I:
10.1016/j.mtcomm.2022.103525
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
20Li(2)O-xBi(2)O(3)-(78-x)TeO2-1Er(2)O(3)-1Ag glass system was prepared by melt quenching, and its DC conductivity, optical and spectroscopic properties were investigated. Its amorphous nature was confirmed by x-ray diffraction analysis. Results showed that DC conductivity sigma dc initially increased at x < 7 mol% and then decreased to a minimum at x = 11 mol% Bi2O3. UV-vis-NIR absorption spectra indicated six transition bands centered at 1496, 979, 799, 653, 544, and 521 nm corresponding to 4I13/2, 4I1(1/2), I-4(9/2), 4F(9/2), 4S(3/2), and 2H(11/2) Er3+ transitions, respectively. Analysis on optical absorption edge by Tauc's plot revealed maximum in direct E-i(iopt) (3.609 eV) and indirect optical energy bandgap E-d(iopt) (3.259 eV) at x = 11 mol%. Judd-Ofelt intensity parameter omega 2 was calculated from optical absorption data to describe the intensity of electron transitions within the 4 f shells of Er3+ ions in the glasses. A minimum omega 2 was obtained at x = 11 mol%. The minimum values of sigma dc and sigma(2) at x = 11 mol% are related to the presence of high bridging oxygen in the mixed ionic-electronic region that in-fluences the symmetry of surrounding Er3+ ions.
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页数:13
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