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KAVITI VENKATA RAO1, GUNNAM NAGARJUNA2,* , R. RAMBABU3
- Department of Chemistry, Jawaharlal Nehru Technological University Kakinada -533003, Andhra Pradesh, India
- Department of Chemistry, S.R.R. & C.V.R. Government Degree College, Vijayawada – 520004, Krishna District, Andhra Pradesh, India
- Department of Chemistry, G.V.P. College of Engineering, Madhurawada – 530048, Visakhapatnam, Andhra Pradesh, India
Synthesis of P2O5-CaO-B2O3 glasses doped with CuO in the range 0.5 to 2.0 mol% using melt quenching technique is done. Initial characterization of samples by XRD and SEM techniques was carried out. XRD patterns confirm the amorphous nature to all samples which was further supported by SEM pictures. Later, optical absorption and photoluminescence spectra for all the samples in the visible and infrared region were recorded. Two significant optical absorption bands in the regions 325 – 340 nm and 550 – 800 nm were noticed. Optical band gap is decreased with the CuO addition. Emission spectra have exhibited one broad band at about 350 – 500 nm and sharp kink at 600-760 nm assigned to transition of single Cu+ centers and Cu+-Cu+ pairs. Increasing structural degree of disorder has been observed with rise of CuO that could be due to octahedrally coordinated divalent copper ions..
Copper ions, Color centres, XRD, SEM, Optical absorption.
Submitted at: Nov. 17, 2020
Accepted at: Oct. 5, 2022
KAVITI VENKATA RAO, GUNNAM NAGARJUNA, R. RAMBABU, Spectroscopic characterization of P2O5-CaO-B2O3: CuO glasses, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 9-10, pp. 494-498 (2022)
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