KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/kmitl/1

Browse

Settings

Access type: UnknownAuthor: search.filters.author.Sareein, T.

Search Results

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Bright Green Emission of Tb3+ Doped Lithium Sodium Potassium Borate Glasses for Photonic Application
    (2023-01-01)
    Jarucha, N.
    ;
    Ruangtaweep, Y.
    ;
    Meejitpaisan, P.
    ;
    Kanthang, P.
    ;
    Wongdamnern, N.
    The melt-quenching approach was implemented to create terbium-doped lithium sodium potassium borate glasses (LNKBTb). Archimedes’ principle, absorption and luminescence spectra, including CIE chromaticity were used to characterize the properties of glasses. Terbium in glasses absorbs photon in the visible and near infrared ranges. The intense green emission at 544 nm was generated by the terbium <sup>5</sup>D<inf>4</inf> to <sup>7</sup>F<inf>5</inf> transition when excited with ultraviolet–visible (UV–Vis) light. The emission intensities of LNKBTb glasses increased with increasing terbium concentrations up to 4 mol%, after which they decreased, resulting in the concentration quenching effect, whereas decay time decreases as Tb<inf>2</inf>O<inf>3</inf> content increases. In CIE 1931, the overall color of emission is green. May bring can continue to develop to use as a photonic material in green light sources and lasers.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Effect of Eu2O3 Concentrations Doped Li-Na-K Borate Glasses on Luminescence Properties for Red Emission Material
    (2023-01-01)
    Jarucha, N.
    ;
    Ruangtaweep, Y.
    ;
    Meejitpaisan, P.
    ;
    Nawarat, P.
    ;
    Kanthang, P.
    This paper investigated the europium-doped lithium sodium potassium borate glasses (LNKBEu). Glass was made using a melt-quenching technique with a range of europium doping concentrations ranging from 0.0 to 5.0 mol%. The absorption spectra showed that photons in the visible light and near infrared ranges were absorbed by the LNKBEu glasses. Photon absorption at 394 nm can excite the mirror to emit a number of photons in the VIS region, such as 590, 613, 652, and 701 nm. The results showed that 3.0 mol% was the optimal concentration of LNKBEu glass. Therefore, 3.0LNKBEu glass was studied using Judd-Ofelt (JO) analysis, which revealed an interesting possibility of its use. This glass is a high power red laser device.
      1
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    White Emission from Dy3+ Doped in ZnO–CaO–B2O3 for WLEDs Material Application
    (2022-01-01)
    Chaemlek, O.
    ;
    Kiwsakunkran, N.
    ;
    Boonpa, W.
    ;
    Wantana, N.
    ;
    Sareein, T.
    The Dy<sup>3+</sup> ions doped CaO-ZnO-B<inf>2</inf>O<inf>3</inf> glasses were synthesis by the melt quenching technique with various Dy<inf>2</inf>O<inf>3</inf> concentrations to investigation physical and optical properties. The results showed that the density and the molar volume trend to be increased along with increased Dy<sup>3+</sup> concentration. The absorption spectra showed characteristic absorption peaks in the visible and near infrared regions. Judd–Ofelt (JO) intensity parameters have been obtained from the optical absorption spectra. The emission spectra of the glasses are illustrated the highest emission intensity at 574 nm wavelength, which corresponding to Dy<sup>3+</sup> transition <sup>4</sup>F<inf>9/2</inf>→<sup>6</sup>H<inf>13/2</inf> level. The decay time value decreased as the concentration of Dy<inf>2</inf>O<inf>3</inf> increased. The CIE 1931 chromaticity investigation showed that Dy<sup>3+</sup> doped glasses emitted light with white color.