Browsing by Subject "Photoluminescence"

Now showing items 1-9 of 9

    • Correlation between the PL and EL emissions of polyfluorene-based diodes using bilayers or polymer blends 

      de Azevedo, Diego; Freitas, Jilian Nei; Domingues, Raquel Aparecida [UNIFESP]; Faleiros, Marcelo Meira; Atvars, Teresa Dib Zambon (Elsevier Science Sa, 2017)
      The electroluminescent (EL) properties of two polyfluorene-based (poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) and poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)] (F8BT)) organic light-emitting ...

    • Crystal growth and photoluminescence of europium-doped strontium titanate prepared by a microwave hydrothermal method 

      Goncalves, R. F. [UNIFESP]; Moura, A. P.; Godinho, M. J.; Longo, E.; Machado, M. A. C.; Castro, D. A. de; Siu Li, M.; Marques, A. P. A. [UNIFESP] (Elsevier B.V., 2015-04-01)
      This article reports that europium-doped strontium titanate (SrTiO3:Eu3+) was successfully synthesized using a co-precipitation method at room temperature with processing in a microwave-hydrothermal system at 140 degrees ...

    • Desenvolvimento de fósforos cerâmicos nanoestruturados puros e dopados com terras raras 

      Tavares, Fabio dos Santos [UNIFESP] (Universidade Federal de São Paulo, 2017-12-07)
      Molybdates, with the general formula AMoO4 (A = Ca, Sr, Ba) and crystalline structure scheelite, have optical properties that make them potential candidates for use in optical devices. In the present work, calcium molybdate ...

    • Effect of Er3+ ions on the phase formation and properties of In(2)O(3)nanostructures crystallized upon microwave heating 

      Lemos, Samantha C. S.; Romeiro, Fernanda C.; de Paula, Leonardo F.; Goncalves, Rosana F. [UNIFESP]; de Moura, Ana P.; Ferrer, Mateus M.; Longo, Elson; Patrocinio, Antonio Otavio T.; Lima, Renata C. (Academic Press Inc Elsevier Science, 2017)
      Regular sized nanostructures of indium oxide (In2O3) were homogeneously grown using a facile route, i.e. a microwave-hydrothermal method combined with rapid thermal treatment in a microwave oven. The presence of Er3+ doping ...

    • Microwave-assisted hydrothermal synthesis of ag-2(w1-xmox)o-4 heterostructures: nucleation of ag, morphology, and photoluminescence properties 

      Silva, M. D. P.; Gonçalves, Rosana de Fátima [UNIFESP]; Nogueira, I. C.; Longo, V. M.; Mondoni, L.; Moron, M. G.; Santana, Y. V.; Longo, Elson (Biomed Central Ltd, 2016)
      Ag2W1-xMoxO4 (x = 0.0 and 0.50) powders were synthesized by the co-precipitation (drop-by-drop) method and processed using a microwave-assisted hydrothermal method. We report the real-time in situ formation and growth of ...

    • Novel blue emitters based on pi-conjugated block copolymers 

      Peres, L. O. [UNIFESP]; Wang, S. H.; Wery, J.; Froyer, G.; Faulques, E. (Elsevier B.V., 2009-03-01)
      A series of new phenyl-based conjugated copolymers has been synthesized and investigated by vibrational and photoluminescence spectroscopy (PL). the materials are: poly( 1,4-phenylene-alt-3,6-pyridazine) (COP-PIR), ...

    • Pf/clay hybrid materials: a simple method to modulate the optical properties 

      Chen Em, Marcio Chao [UNIFESP]; Barbosa, Camila Gouveia [UNIFESP]; Peres, Laura Oliveira [UNIFESP]; Faez, Roselena (Assoc brasil polimeros, 2016)
      The aim of this work was modulate the emission properties and improve thermal stability of a conjugated polymer incorporated into an inorganic matrix. Hybrid material was prepared based on poly(9,9-dioctylfluorene-co-phenylene ...

    • Termoluminescência e luminescência opticamente estimulada da calcita natural amarela 

      Guilheiro, Joice Marques [UNIFESP] (Universidade Federal de São Paulo, 2022-06-29)
      Objetivos: Caracterização da estrutura cristalina da amostra de calcita, com a finalidade de possível uso na dosimetria ambiental e datação geológica. Métodos: Para caracterizar a estrutura cristalina do mineral, foram ...

    • Tuning the emission color of a single-layer polymer light-emitting diode with a solution-processed external layer 

      de Azevedo, Diego; Freitas, Jilian Nei; Domingues, Raquel Aparecida [UNIFESP]; Faleiros, Marcelo Meira; de Almeida Santos, Thebano Emilio; Zambon Atvars, Teresa Dib (Elsevier Science Sa, 2016)
      The emission color of a single-layer polymer light-emitting diode (PLED) was tuned using an external layer. We combine an electroluminescent polymer, known as poly[(9,9-dioctylfluoreny1-2,7-diyl)-alt-(benzo[2,1,3]thiadia ...