Optical properties of 60B2O3-(40-x)PbO-xMCl2 and 50B2O3-(50-x) PbO-xMCl2 (M = Pb, Cd) glasses |
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| Authors: | Shajo Sebastian and M Abdul Khadar |
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| Affiliation: | (1) Department of Physics, University of Kerala, Kariavattom PO, 695 581 Thiruvananthapuram, India;(2) School of Pure and Applied Physics, Mahatma Gandhi University, Priyadarshini Hills PO, 686 560 Kottayam, India |
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| Abstract: | Optical absorption and transmittance spectra of 60B2O3-(40-x)PbO-xMCl2 and 50B2O3-(50-x) PbO-xMCl2 (M = Pb, Cd) (10 ≤x ≤ 20) glasses of varying composition were recorded in the UV-visible region. Various optical parameters such as optical energy
gap (E
opt), Urbach energy (E
e), refractive index (n
0), optical dielectric constant (ε∞), and ratio of carrier concentration to the effective mass (N/m*;) were determined. The variation of optical energy gap with increase in the concentration of PbCl2 or CdCl2 is discussed. |
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| Keywords: | Borate glasses optical energy gap Urbach energy |
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