Determination of Optical Band Gaps and Structural Properties of Cu2+ Doped B2O3-Na2O-Al2O3-V2O5 Glasses

Authors : Gökhan KILIÇ, Ertunç ARAL

Pages : 129-139

View : 11 | Download : 6

Publication Date : 2010-03-26

Article Type : Other Papers

Abstract :Two different groups of compositions for 80B 2 O 3 + 15Na 2 O + insert ignore into journalissuearticles values(5-x); Al 2 O 3 + insert ignore into journalissuearticles values(x); V 2 O 5 and 85B 2 O 3 + 10Na 2 O +insert ignore into journalissuearticles values(5-x); Al 2 O 3 + insert ignore into journalissuearticles values(x); V 2 O 5 insert ignore into journalissuearticles values(where x=1; 0.5 wt %); glass samples were prepared by quenching technique and doped with Cu 2+ ions. Optical and structural properties of undoped glasses, and glasses doped with Cu 2+ ions were examined. Their structural properties were determined with SEM images and EDX spectra. Optical band gaps of glass samples were determined for direct and indirect transitions from the transmittance spectra. Through the fundamental ultra violet absorption edges of the glasses, the optical band gap energies and Urbach energies were evaluated. Optical band gap energies were calculated to be within the range of 2.963–3.228 eV for direct and 2.592–2.807 eV for indirect transitions. The physical properties of all glasses were also evaluated with respect to the composition.   Key Words: Glasses, Vanadium, Semiconductors, Optical Properties.
Keywords :