Podrobnosti záznamu

Název
    Investigation of electrical and optical properties of Ge-Ga-As-S glasses doped with rare-earth ions
Autor
    Iovu, M.
    Ivanova, Z.G.
    Kostka, Petr
    Kubliha, M.
    Labaš, V.
    Zavadil, Jiří
Jazyk
    anglicky
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    Journal of Non-Crystalline Solids
Svazek/č.
    -, č. 377
Strany
    s. 85-89
Rok
    2013
Poznámky
    Autoři celkem: 6
    Projekt: 7AMB12SK147, GA MŠk3cav_un_auth*0281680
    Projekt: GAP106/12/2384, GA ČR3cav_un_auth*0285043
    Rozsah: 5 s. : P
Předmětová kategorie
    Chalcogenide glass
    Direct electrical conductivity
    Photoluminescence
Klíčové slovo
    Doped
    Electrical
    Ge-Ga-As-S
    Glasses
    Investigation
    Ions
    Optical
    Properties
    Rare-earth
Abstrakt (anglicky)
   Bulk glasses Ge250Ga17As83S650 were prepared by direct synthesis from high purity (6 N) elements S, Ga, Ge, As and doped by rare earth (RE) elements - Pr, Dy, Nd, Sm or Ho. The DC and AC electrical conductivity were measured, and activation energies of relevant conductivity process were obtained from Arrhenius plots of its temperature dependence. The real part of complex permittivity as a function of temperature and frequency was deduced from AC conductivity data. Room temperature optical transmission and low temperature photoluminescence (PL) spectra were further investigated. The major feature in low-temperature PL spectra is the presence of the broad band luminescence of the base glass and relatively sharp 4f-4f radiative transitions due to the presence of RE3+ ions.
   When the broad band luminescence spectrally overlaps with 4f-4f transitions of RE 3+ ions we can, in some cases, also observe the direct evidence of the energy transfer between the host glass and respective RE dopants which is manifested by the re-absorption of the base glass luminescence due to 4f -4f up-transitions
Přispěvatel
    AV ČR Brno, Ústav struktury minerálů a hornin
Kód přispěvatele
    AV ČR, ÚSMH
Zdrojový formát
    U
Datum importu
    24. 10. 2014