Search Results - "Krieke, Guna"

UV and X-ray excited red persistent luminescence in Mn2+ doped MgGeO3 material synthesized in air and reducing atmosphere by Doke, Guna, Antuzevics, Andris, Krieke, Guna, Kalnina, Aija, Springis, Maris, Sarakovskis, Anatolijs

“…Materials with long persistent luminescence (PersL) have caused widespread interest among scientists and industry for decades. Currently, there is widely…”
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Eu3+ ion distribution in oxyfluoride glass nanocomposites by Antuzevics, Andris, Krieke, Guna, Pavlovska, Elina, Rogulis, Uldis

“…Assessment of activator distribution in lanthanide doped nanocomposites is an important and challenging task. Oxyfluoride glass ceramics have been chosen as a…”
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Novel method of phosphorescent strontium aluminate coating preparation on aluminum by Bite, Ivita, Krieke, Guna, Zolotarjovs, Aleksejs, Laganovska, Katrina, Liepina, Virginija, Smits, Krisjanis, Auzins, Krisjanis, Grigorjeva, Larisa, Millers, Donats, Skuja, Linards

“…This study presents a novel approach to produce phosphorescent coatings on metal surfaces. Strontium aluminates are the most popular modern phosphorescent…”
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Shortwave Ultraviolet Persistent Luminescence of Sr2MgSi2O7: Pr3 by Antuzevics, Andris, Doke, Guna, Krieke, Guna, Rodionovs, Pavels, Nilova, Dace, Cirulis, Jekabs, Fedotovs, Andris, Rogulis, Uldis

“…Currently, extensive research activities are devoted to developing persistent phosphors which extend beyond the visible range. In some emerging applications,…”
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Oxidation State and Local Structure of Chromium Ions in LaOCl by Antuzevics, Andris, Krieke, Guna, Ozols, Haralds, Fedotovs, Andris, Sarakovskis, Anatolijs, Kuzmin, Alexei

“…LaOCl doped with 0–10 mol% Cr was synthesized by thermal decomposition of chlorides. X-ray diffraction (XRD) analysis revealed that incorporation of chromium…”
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Upconversion luminescence in erbium doped transparent oxyfluoride glass ceramics containing hexagonal NaYF4 nanocrystals by Sarakovskis, Anatolijs, Krieke, Guna

“…In this work transparent erbium doped oxyfluoride glass ceramics containing hexagonal NaYF4 nanocrystals has been prepared by melt-quenching and subsequent…”
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How activator ion concentration affects spectroscopic properties on Ba4Y3F17: Er3+, Yb3+, a new perspective up-conversion material by Grube, Jurgis, Krieke, Guna

“…Ba4Y3F17 with Er3+ and Yb3+, a promising material for up-conversion luminescence, was synthesized. Excellent isomorphic capacity was detected. Low-temperature…”
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Crystallization and upconversion luminescence of distorted fluorite nanocrystals in Ba2+ containing oxyfluoride glass ceramics by Krieke, Guna, Sarakovskis, Anatolijs

“…In this study novel Er3+-doped transparent glass ceramics were prepared from melt-quenched glasses with general composition of Na2O-NaF-BaF2-YF3-Al2O3-SiO2…”
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Novel broadband near-infrared emitting long afterglow phosphor MgGeO3: Cr3 by Doke, Guna, Antuzevics, Andris, Krieke, Guna, Kalnina, Aija, Sarakovskis, Anatolijs

“…In this study, we report broadband near-infrared persistent luminescence of a novel MgGeO3: Cr3+ material. The luminescence can be excited by the ultraviolet…”
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Ordering of fluorite-type phases in erbium-doped oxyfluoride glass ceramics by Krieke, Guna, Sarakovskis, Anatolijs, Springis, Maris

“…In this study, novel transparent Er3+ doped glass ceramics were prepared from melt-quenched oxyfluoride glasses with general composition of…”
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Optical properties of red-emitting long afterglow phosphor Mg2Si1-xGexO4: Mn2+/Mn4 by Doke, Guna, Krieke, Guna, Antuzevics, Andris, Sarakovskis, Anatolijs, Berzina, Baiba

“…For decades, materials with persistent luminescence (PersL) have triggered interest among scientists and industry. A considerable amount of research has been…”
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Enhancement of persistent luminescence in Ca2SnO4: Sm3 by Krieke, Guna, Antuzevics, Andris, Smits, Krisjanis, Millers, Donats

“…Reddish-orange persistent luminescent Ca2SnO4: 0.1% Sm3+ co-doped with 0–10% Gd3+ was prepared using solid state synthesis. The phase formation and morphology…”
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Cubic and rhombohedral Ba4Lu3F17:Er3+ in transparent glass ceramics: Crystallization and upconversion luminescence by Krieke, Guna, Sarakovskis, Anatolijs, Springis, Maris

“…Novel Er3+ doped glass ceramics containing Ba4Lu3F17 nanocrystals were successfully prepared by heat treatment of melt-quenched glasses. Highly efficient…”
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Upconversion luminescence of Er3+/Yb3+ and their role in the stabilization of cubic NaLaF4 nanocrystals in transparent oxyfluoride glass ceramics by Krieke, Guna, Sarakovskis, Anatolijs, Springis, Maris

“…Novel Er3+ and Yb3+ doped transparent oxyfluoride glass ceramics containing NaLaF4 nanocrystals were prepared from oxyfluoride glasses with general composition…”
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Tuneable persistent luminescence of novel Mg3Y2Ge3O12 garnet by Krieke, Guna, Doke, Guna, Antuzevics, Andris, Pudza, Inga, Kuzmin, Alexei, Welter, Edmund

“…In this work novel garnet persistent luminescence phosphor Mg3Y2Ge3O12: Tb3+ (MYG: Tb3+) with bright blue to green tuneable emission is reported. MYG: Tb3+…”
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Multisite formation in gadolinium doped SrF2 nanoparticles by Antuzevics, Andris, Kemere, Meldra, Krieke, Guna

“…Gadolinium doped SrF2 nanoparticles have been synthesized by the precipitation method and characterized by site-selective optical spectroscopy and electron…”
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Structure and persistent luminescence of novel Pr-doped Mg3Lu2Ge3O12 garnet by Krieke, Guna, Doke, Guna, Antuzevics, Andris, Ignatans, Reinis, Pudza, Inga, Kuzmin, Alexei

“…Garnet-based materials are widely investigated for applications in optics. In this research, we report the structure and spectroscopic properties of novel…”
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Ultraviolet-C persistent luminescence and defect properties in Ca2Al2SiO7:Pr3 by Nilova, Dace, Antuzevics, Andris, Krieke, Guna, Doke, Guna, Pudza, Inga, Kuzmin, Alexei

“…In recent years, significant attention has been focused on the study of materials with ultraviolet (UV) persistent luminescence (PersL) due to their…”
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Multisite formation in gadolinium doped SrF^sub 2^ nanoparticles by Antuzevics, Andris, Kemere, Meldra, Krieke, Guna

“…Gadolinium doped SrF2 nanoparticles have been synthesized by the precipitation method and characterized by site-selective optical spectroscopy and electron…”
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Trap properties of novel UV-A persistent phosphor Sr3MgSi2O8:Ce3 by Doke, Guna, Krieke, Guna, Rodionovs, Pavels, Nilova, Dace, Antuzevics, Andris

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