JORMA HÖLSÄ
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Artigo IPEN-doc 21337 Low temperature synthesis and optical properties of the Rsub(2)Osub(3):Eusup(3+) nanophosphors (Rsup(3+):Y, Gd and Lu) using TMA complexes as precursors2015 - SILVA, I.G.N.; RODRIGUES, L.C.V.; SOUZA, E.R.; KAI, J.; FELINTO, M.C.F.C.; HOLSA, J.; BRITO, H.F.; MALTA, O.L.Resumo IPEN-doc 14678 Persistent luminescence BaAlsub(2)Osub(4):Eusup(2+), Dysup(3+) phosphor incorporated in silica: water resistance2009 - LOURENCO, A.V.S.; RODRIGUES, L.C.V.; KODAIRA, C.A.; STEFANI, R.; BRITO, H.F.; FELINTO, M.C.F.C.; HOLSA, J.Barium aluminates doped with divalent europium and trivalent dysprosium were prepared with the combustion method and then incorporated with silica using the microemulsion method. The incorporated phosphor particles showed improved water resistance, preserving much of the prior persistent luminescence properties even after interaction with water whereas the nonincorporated particles loosed the original persistent luminescence. The infrared absorption spectroscopy, X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence studies were used to characterize the phosphors. The pH of the phosphor-water mixture after the reaction with water was measured to compare the water resistance of the materials. The photoluminescence of the incorporated BaAl2O4:Eu2+,Dy3+ with water modified slightly the 4f6 5d1 →4f7 transition of Eu2+, however.Resumo IPEN-doc 16633 Spectroscopic studies of CdSiOsub(3):Rsup(3+) persistent luminescence phosphors2010 - RODRIGUES, L.C.V.; BRITO, H.F.; HOLSA, J.; STEFANI, R.; FELINTO, M.C.F.C.; LASTUSAARI, M.Resumo IPEN-doc 16280 Persistent luminescence of barium aluminate doped with Eusup(2+) prepared by the combustion method2008 - RODRIGUES, L.C.V.; STEFANI, R.; CARVALHO, C.A.A.; BRITO, H.F.; KODAIRA, C.A.; FELINTO, M.C.F.C.; HOLSA, J.Resumo IPEN-doc 16283 Encapsulation study of persistent luminescent material in silica2008 - LOURENCO, A.V.S.; RODRIGUES, L.C.V.; KODAIRA, C.A.; STEFANI, R.; CARVALHO, C.A.A.; BRITO, H.F.; FELINTO, M.C.F.C.; HOLSA, J.Resumo IPEN-doc 18723 Low temperature synthesis of Rsub(2)Osub(3):Eusup(3+) (R: Y, Gd and Lu) nanophosphor using trimellitic acid precursors2012 - RODRIGUES, LUCAS C.V.; KAI, JIANG; FELINTO, MARIA C.F.C.; HOLSA, JORMA; BRITO, HERMI F.; SILVA, IVAN G.N.Resumo IPEN-doc 18731 Cálculos DFT ab initio do BaAlsub(2)Osub(4):Eusub(2+) com luminescência persistente2012 - BRITO, HERMI F.; FELINTO, MARIA C.F.C.; HOLSA, JORMA; LAAMANEN, TANELI; LASTUSAARI, MIKA; MAIKAMAKI, MARJA; NOVAK, PAVEL; RODRIGUES, LUCAS C.V.; STEFANI, ROBERVALResumo IPEN-doc 18719 Low temperature synthesis of Rsub(2)Osub(3):Eusup(3+) (R: Y, Gd and Lu) nanophosphor using trimellitic acid precursors2012 - SILVA, IVAN G.N.; RODRIGUES, LUCAS C.V.;; SOUZA, ERNESTO R.; KAI, JIANG; FELINTO, MARIA C.F.C.; NUNES, LUIZ A.O.; HOLSA, JORMA; BRITO, HERMI F.Resumo IPEN-doc 18729 Synthesis, characterization and spectroscopic properties of nanosize Eusub(2)(MoOsub(4))sub(3) and Eu3+:Ysub(2)(MoOsub(4))sub(3)2012 - DIAS, CLARISSA L.; PAGANINI, PAULA P.; RODRIGUES, LUCAS C.V.; HOLSA, JORMA; MALTA, OSCAR M.; BRITO, HERMI F.; FELINTO, MARIA C.F.C.Resumo IPEN-doc 18726 Synthesis, characterization and spectroscopic studies of tin/titanium mixed oxide nanoparticles doped with europium for use in biomarkers2012 - PAGANINI, PAULA P.; RODRIGUES, LUCAS C.V.; HOLSA, JORMA; NUNES, LUIZ A.O.; MALTA, OSCAR L.; BRITO, HERMI F.; FELINTO, MARIA C.F.C.