Emission analysis of RE3+ (Eu3+, Tb3+ & Ho3+) : B2O3–BaO­LiF/AIF3 glasses

We report here the luminescence spectra of certain rare earth ions (Eu3+, Tb3+ & Ho3+) doped B2O3-BaO-LiF/AiF3 based on the measurements of emission and decay curves of prominent emission transitions. For both the reference host glasses, FTIR, XRD, DTA-TG profiles have been recorded to understand their structural and thermal properties. Eu3+ doped glasses have shown five emission transitions of 5D0 . 7F01,2,3 & 4 located at 580nm, 593nm, 615nm, 655nm and 704nm respectively with an excitation at .exci = 392 nm (7F0 . 5L6). Also under an UV source, these europium glasses have displayed a bright red emission from their surfaces. Tb3+ glasses have exhibited four emission bands of 5D4 . 7F6,5,4,3 at 491nm, 547nm, 588nm and 625nm respectively with an excitation at .exci = 376 nm (7F6 . 5G6). Intense green emission from the glass surfaces has been noticed upon exposure to the UV source. Prominently bluish-green emission has been noticed from the surfaces of the holmium glasses under an UV source and same emission transition (5F4 . 5I8) at 519 nm with an excitation at .exci = 389 nm (5I8 – 5G4) has also been obtained from their measured emission spectra. For all the prominent emissions of the rare earth glasses, decay curves have been measured to compute their lifetimes.Emission analysis of RE3+ (Eu3+, Tb3+ & Ho3+) : B2O3–BaO­LiF/AIF3 glasses B H Rudramadevi and S Buddhudu* Department of Physics, Sri Venkateswara University, Tirupati-517 502, Andhra Pradesh, India E-mail : drsb99@hotmail.comDepartment of Physics, Sri Venkateswara University, Tirupati-517 502, Andhra Pradesh, Indi