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Listar por palabra clave "Photoluminescence"

Mostrando ítems 1-20 de 24

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Broadband, site selective and time resolved photoluminescence spectroscopic studies of finely size-modulated Y2O3:Eu3+ phosphors synthesized by a complex based precursor solution method

Ray, Sudeshna; León-Luis, Sergio Fabián; Manjón Herrera, Francisco Javier; Mollar García, Miguel Alfonso; Gomis Hilario, Oscar; Rodríguez-Mendoza, Ulises Ruyman; Agouram, Said; Muñoz, Alfonso; Lavín, Victor (Elsevier, 2014-01)

Undoped and Eu3+-doped cubic yttria (Y2O3) nanophosphors of good crystallinity, with selective particle sizes ranging between 6 and 37 nm and showing narrow size distributions, have been synthesized by a complex-based ...
Characterization and photoluminescence properties of some CaO, SrO and CaSrO2 phosphors co-doped with Eu3+ and alkali metal ions

Marí Soucase, Bernabé; Singh, Krishan Chander; Moya Forero, Mónica Mercedes; Singh, Ishwar; Om, Hari; Chand, Subhash (Elsevier, 2012-06)

CaO:Eu3+, M+ (Li+ or Na+ or K+ ), SrO:Eu3+and CaSrO2:Eu3+ powders were prepared by combustion synthesis method and the samples were further heated to 1000 C to improve the crystallinity of the materials. The structure ...
Diseño de estrategias de intercalación de nanocristales de perovskita CH3NH3PbBr3 y CsPbBr3 en nanopartículas de sílice mesoporosa mediante el empleo de precolumnas cromatográficas de alta eficiencia

Teixeira Miranda, William (Universitat Politècnica de València, 2021-02-18)

[ES] Las perovskitas de halogenuros metálicos, cuya fórmula general es ABX3 (A = Cs +, Rb+, CH3NH3+; B = Pb2+, Sn2+; y X = Cl¿, Br¿, I¿), presentan propiedades ópticas muy atractivas, ¿ como un alto rendimiento cuántico ...
Effect of guanidinium on the optical properties and structure of the methylammonium lead halide perovskite

Vega-Fleitas, Erica; Mollar García, Miguel Alfonso; Marí, B. (Elsevier, 2018)

[EN] The stability and performance of perovskite-based solar cells can be improved by changing the nature of the organic cation. Herein, mixed methylammoniumeguanidinium perovskites (MA1-xGAxPbI3) are structurally and ...
Enhanced luminescence by tunable coupling of Eu3+ and Tb3+ in ZnAl2O4:Eu3+:Tb3+ phosphor synthesized by solution combustion method

Verma, Naveen; Marí, B.; Singh, Krishan Chander; Jindal, Jitender; Yadav, Suprabha; Mittal, Anuj (Springer-Verlag, 2019)

[EN] ZnAl2O4:Eu3+ or Tb3+ (1 mol%) and ZnAl2O4:Eu3+/Tb3+ with varied concentrations of Eu3+ and Tb3+ were prepared by solution combustion method. The photoluminescence spectra of synthesized compounds shows that simultaneous ...
Experimental and theoretical study of α–Eu2(MoO4)3 under compression

Guzmán-Afonso, C.; León-Luis, S.F.; Sans-Tresserras, Juan Ángel; González -Silgo, C.; Rodríguez-Hernández, Plácida; Radescu, S.; Muñoz, A.; López-Solano, J.; Errandonea, D.; Manjón, F.J.; Rodríguez-Mendoza, U.R.; Lavín, V. (IOP Publishing, 2015-11-25)

The compression process in the α-phase of europium trimolybdate was revised employing several experimental techniques. X-ray diffraction (using synchrotron and laboratory radiation sources), Raman scattering and ...
Generation of MoS2 quantum dots by laser ablation of MoS2 particles in suspension and their photocatalytic activity for H-2 generation

Garcia-Baldovi, Hermenegildo; Latorre Sánchez, Marcos; Esteve-Adell, Iván; Kham, Anish; Asiri, Abdullah M.; Kosa, Samia A.; García Gómez, Hermenegildo (Springer-Verlag, 2016)

[EN] MoS2 quantum dots (QDs) have been obtained in colloidal suspensions by 532 nm laser ablation (7 ns fwhp/pulse, 50 mJ/pulse) of commercial MoS2 particles in acetonitrile. High-resolution transmission electron microscopy ...
MAPbI2.9-xBrxCl0.1 hybrid halide perovskites: Shedding light on the effect of chloride and bromide ions on structural and photoluminescence properties

Atourki, L.; Vega-Fleitas, Erica; Marí, B.; Mollar García, Miguel Alfonso; Ahsaine, H.A.; Bouabid, K.; Ihlal, A. (Elsevier, 2016)

[EN] The optical and structural properties of CH3NH3PbI3 can be adjusted by introducing other extrinsic ions such as chloride and bromide. In this work, mixed bromide iodide lead perovskites with a 10% fraction of chloride ...
Optical properties of Yb3+ doped ZnO/MgO nanocomposites

Marí, B.; Singh, Krishan Chander; Verma, Naveen; Jindal, J. (Elsevier, 2016-08-15)

[EN] Yb3þ doped ZnO/MgO nanocomposite were prepared by combustion synthesis method. The samples were further heated to 1000 °C to improve their crystallinity and photoluminescent efficiency. The concentrations of Yb3þ ...
Opto-electrical characterisation of In-doped SnS thin films for photovoltaic applications

Urbaniak, A.; Pawlowski, M.; Marzantowicz, M.; Sall, Thierno; Marí, B. (Elsevier, 2017)

[EN] Spray pyrolised SnS thin films doped with indium were studied using various optical and electrical techniques.Structural analysis shows that all films crystallise in an orthorhombic structurewith (111) as a preferential ...
Photoluminescence Study of Eu+3 doped ZnO Nanocolumns Prepared by Electrodeposition Method

Nouri, Abdelhak Nouri; Beniaiche, Abdelkrim Beniaiche; Marí, B.; Guessas, H.; Azizi, Amor (Elsevier, 2017)

[EN] Europium doped ZnO (ZnO:Eu) nanocolumns were grown on indium tin oxide substrates (ITO) by electrodeposition method in zinc nitrate aqueous solution with different concentration of Eu. According to XRD results ...
Photoluminescent properties of electrochemically synthetized ZnO nanotubes

Gracia Jimenez, J. M.; Cembrero Cil, Jesús; Mollar García, Miguel Alfonso; Marí Soucase, Bernabé (Elsevier, 2016-09)

ZnO nanotubes were prepared by a sequential combination of electrochemical deposition, chemical attack and regeneration. ZnO nanocolumns were initially electrodeposited on conductive substrates and then converted into ...
Propiedades ópticas y eléctricas de monocristales de materiales híbridos

Segura Sanchis, Elena (Universitat Politècnica de València, 2024-02-15)

[ES] Uno de los retos más importantes de la sociedad actual es la obtención de energía de forma sostenible, limpia y eficiente. Por ello, gran parte de la investigación actual en el campo de la química y la ciencia de los ...
Síntesis y aplicaciones de perovskitas libre de plomo.

Lin Lin, Jiaming (Universitat Politècnica de València, 2022-10-20)

[ES] El correspondiente trabajo de final de máster va a consistir en la síntesis de nanopartículas semiconductoras basadas en perovskitas, que sean libres de plomo o con metales menos tóxicos. Dado que las estructuras de ...
Spray pyrolysis synthesis and characterization of Mg1-xSrxMoO4 heterostructure with white light emission

Santiago, A. A. G.; Tranquilin, R. L.; Botella, P.; Manjón, Francisco-Javier; Errandonea, D.; Paskocimas, C. A.; Motta, F. V.; Bomio, M. R. D. (Elsevier, 2020-01-15)

[EN] Molybdates are inorganic materials with great potential in white phosphors application, being an alternative to traditional lighting sources. In this study, we report the synthesis and characterization of Mg1-xSrxMoO4 ...
Study of the effect of V-doping on the opto-electrical properties of spray-pyrolized SnS thin films

Urbaniak, A.; Pawlowski, M.; Marzantowicz, M.; Marí, B.; Sall, Thierno (Elsevier, 2018)

[EN] SnS is an earth-abundant material that is a potentially suitable candidate for the absorber layer in solar cells. Here spray-pyrolized SnS thin films doped with vanadium were studied using structural and opto-electrical ...
Surface stiffening and enhanced photoluminescence of ion implanted cellulose - polyvinyl alcohol - silica composite

Shanthini, G. M.; Sakthivel, N.; Menon, Ranjini; Nabhiraj, P. Y.; Gómez-Tejedor, José Antonio; Meseguer Dueñas, José María; Gómez Ribelles, José Luís; Krishna, J. B. M.; Kalkura, S. Narayana (Elsevier, 2016-11-20)

Novel Cellulose (Cel) reinforced polyvinyl alcohol (PVA)-Silica (Si) composite which has good stability and in vitro degradation was prepared by lyophilization technique and implanted using N3+ ions of energy 24 keV in the ...
Synthesis and Characterization of Indium Phosphide Quantum Dots for Photoelectrochemical Applications

Harabi, Imen (Universitat Politècnica de València, 2023-06-09)

[ES] Hoy en día, existen desafíos tecnológicos y de ingeniería que se beneficiarían de las contribuciones de la nanociencia y la nanotecnología. A esta escala, las propiedades físicas y químicas de los sistemas han de ...
Synthesis and characterization of perovskite FAPbBr(3-x) I (x) thin films for solar cells

Slimi, B.; Mollar García, Miguel Alfonso; Ben Assaker, I.; Kriaa, A.; Chtourou, R.; Marí, B. (Springer-Verlag, 2017)

[EN] FAPbI3, FAPbBr3, and FAPbBr3-xIx perovskite thin films were produced in a single step from a solution containing a mixture of FAI, PbI2, FABr, and PbBr2 (FA = formamidinium). FAPbBr3-xIx perovskite thin films were ...
Synthesis of MAPbBr3-iYi (Y=I, Cl; i=0 ,1 ,2, 3) perovskite thin films

Vega-Fleitas, Erica; Mollar García, Miguel Alfonso; Marí, B. (John Wiley & Sons, 2016)

[EN] Methylammonium lead halide perovskites with different halides (iodide, bromide and chloride) have been synthetized from methylamine, lead nitrate and the corresponding hydroX acid (X = I, Br, Cl) precursors. Subsequently ...