Bulg. J. Phys. vol.50 no.3 (2023), pp. 225-231

Optical Absorption and Emission Spectral Properties of ZnO-Bi2O3-B2O3:TiO2 Glasses

Bejjipurapu Chandrasekhar1, Gunnam Nagarjuna2, Sopinti Ramesh1, Darsi Rajeswara Rao3, B.V. Raghavaiah4
1Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, 522510, Andhra Pradesh, India
2Department of Chemistry, S.R.R. & C.V.R. Government Degree College (A), Vijayawada, 520004, Krishna District, Andhra Pradesh, India
3Department of Physics, Government Junior College, Tiruvuru, 521235, Krishna District, Andhra Pradesh, India
4Department of Physics, RGUKT - Ongole Campus, Rajiv Gandhi University of Knowledge Technologies-AP,Ongole, 523001, Andhra Pradesh, India
Abstract. A glass composition ZnO-Bi2O3-B2O3:TiO2 is selected, and samples were made using melt and quench method. Initial characterization tests like X-ray diffraction and scanning electron microscopy are carried out to assess the solid-state behavior of samples. After fundamental characterization, samples were tested for optical absorption and emission spectral properties. The diffraction patterns and scanning images validate glassy behavior. The experimental density and Ti ion concentrations found to increase with the introduction of TiO2 while average molecular weight has shown decreasing trend. The absorption spectra have exhibited the two relevant absorption bands of titanium ions in the range about 510 to 550 nm and 680 to 700 nm. Emission spectra of all samples have confirmed that a wide band from 400 to 540 nm is seen and the test sample with low amount of TiO2 has shown evidence of highest peak intensity in comparison with remaining samples. The reasons for spectral variations by mean of oxidation states and occupational locations of Ti were explored in detail.

doi: https://doi.org/10.55318/bgjp.2023.50.3.225

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