Listar por tema "nanocrystals"

Mostrando ítems 1-20 de 23

    • openAccess   Beyond universal volume scaling: tailoring two-photon absorption in nanomaterials by heterostructure design 

      Alo, Arthur; Barros, Leonardo; Nagamine, Gabriel; Cotrino Lemus, Jonathan; Planelles, Josep; Movilla, Jose L.; Climente, Juan I.; Lee, Hak June; Bae, Wan Ki; Padilha, Lazaro ACS Publications (American Chemical Society) (2023-07-28)
      Colloidal semiconductor nanomaterials present broadband, with large cross-section, two-photon absorption (2PA) spectra, which turn them into an important platform for applications that benefit from a high nonlinear optical ...

    • openAccess   Controlling the Phase Segregation in Mixed Halide Perovskites through Nanocrystal Size 

      Gualdrón Reyes, Andrés Fabián; YOON, SEOG JOON; Barea, Eva M; Agouram, Said; Muñoz-Sanjosé, Vicente; Meléndez, Ángel M.; Niño-Gómez, Martha E.; Mora-Sero, Ivan American Chemical Society (2019)
      Mixed halide perovskites are one of the promising candidates in developing solar cells and light-emitting diodes (LEDs), among other applications, because of their tunable optical properties. Nonetheless, photoinduced phase ...

    • openAccess   Correlation between structural and electronic order-disorder effects and optical properties in ZnO nanocrystals 

      La Porta, Felipe A.; Andres, Juan; Vismara, M. V. G.; Graeff, C. F. O.; Sambrano, Julio; Li, Maximo Siu; Varela, José A.; Longo, Elson Royal Society of Chemistry (2014-10)
      The correlation between structural and electronic order–disorder effects in understanding the optical properties of flower-like ZnO nanocrystals synthesized by the microwave-assisted hydrothermal method at low temperatures ...

    • openAccess   Enhanced nanoscopy of individual CsPbBr3 perovskite nanocrystals using dielectric sub-micrometric antennas 

      Suárez, Isaac; Wood, Thomas; Martínez-Pastor, Juan P.; Balestri, Dario; Checcucci, Simona; DAVID, Thomas; FAVRE, Luc; Claude, Jean-Benoît; Grosso, David; Gualdrón Reyes, Andrés Fabián; Mora-Sero, Ivan; Abbarchi, Marco; Gurioli, Massimo AIP Publishing (2020-02-11)
      We demonstrate an efficient, simple, and low-cost approach for enhanced nanoscopy in individual green emitting perovskite (CsPbBr3)nanocrystals via TiO2dielectric nanoantenna. The observed three- to five-fold ...

    • openAccess   Fabrication by Laser Irradiation in a Continuous Flow Jet of Carbon Quantum Dots for Fluorescence Imaging 

      Doñate-Buendía, Carlos; Torres-Mendieta, Rafael; Pyatenko, Alexander; Falomir, Eva; Fernández Alonso, Mercedes; Mínguez-Vega, Gladys American Chemical Society (2018)
      Fluorescent carbon quantum dots (CQDs) are synthesized by laser irradiation of carbon glassy particles suspended in polyethylene glycol 200 by two methods, a batch and a flow jet configuration. The flow jet configuration ...

    • openAccess   Fully Inkjet-Printed Green-Emitting PEDOT:PSS/NiO/Colloidal CsPbBr3/SnO2 Perovskite Light-Emitting Diode on Rigid and Flexible Substrates 

      Vescio, Giovanni; Mathiazhagan, Gayathri; Gonzalez-Torres, Sergio; Sanchez-Diaz, Jesus; Villanueva Antoli, Alexis; Sánchez, Rafael S.; Gualdrón Reyes, Andrés Fabián; Oszajca, Marek; Linardi, Flavio; Hauser, Alina; Vinocour-Pacheco, Felipe A.; Żuraw, Wiktor; Öz, Senol; Hernández, Sergi; Mora-Sero, Ivan; Cirera, Albert; Garrido, Blas Wiley (2023)
      After establishing themselves as promising active materials in the field of solar cells, halide perovskites are currently being explored for fabrication of low-cost, easily processable, and highly efficient light-emitting ...

    • openAccess   High Quality Inkjet Printed-Emissive Nanocrystalline Perovskite CsPbBr3 Layers for Color Conversion Layer and LEDs Applications 

      Vescio, Giovanni; Gualdrón Reyes, Andrés Fabián; Hernández, Sergi; Mora-Sero, Ivan; Garrido, Blas; Cirera, Albert Wiley (2022)
      Metal halide perovskites (MHPs) have shown outstanding optical emissive properties and can be employed in several optoelectronics devices. In contrast with materials of well-established technologies, which are prone to ...

    • openAccess   In situ Transmission Electron Microscopy observation of Ag nanocrystal evolution by surfactant free electron-driven synthesis 

      Longo, Elson; Avansi, Waldir; Bettini, Jefferson; Andres, Juan; Gracia, Lourdes Nature Publishing Group (2016)
      The study of the interaction of electron irradiation with matter and the response of the material to the passage of electrons is a very challenging problem. However, the growth mechanism observed during nanostructural ...

    • openAccess   Interpretation of the photoluminescence decay kinetics in metal halide perovskite nanocrystals and thin polycrystalline films 

      Chirvony, Vladimir; Sekerbayev, Kairolla; Pashaei Adl, Hamid; Suárez, Isaac; Taurbayev, Yerzhan; Gualdrón Reyes, Andrés Fabián; Mora-Sero, Ivan; Martínez-Pastor, Juan P. Elsevier (2020-05)
      In this paper we present critical analysis of different points of view on interpretation of the photoluminescence (PL) decay kinetics in lead halide perovskites prepared in the form of well passivated nanocrystals (PNCs) ...

    • openAccess   Lead-Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective 

      López-Fernández, Iago; Valli, Donato; Wang, Chun-Yun; Samanta, Subarna; Okamoto, Takuya; Huang, Yi-Teng; Sun, Kun; Liu, Yang; Chirvony, Vladimir; Patra, Avijit; Zito, Juliette; De Trizio, Luca; Gaur, Deepika; Sun, Hong-Tao; Xia, Zhiguo; Li, Xiaoming; Zeng, Haibo; Mora-Sero, Ivan; Pradhan, Narayan; Martínez-Pastor, Juan P.; Müller-Buschbaum, Peter; Biju, Vasudevanpillai; Debnath, Tushar; Saliba, Michael; Debroye, Elke; Hoye, Robert; Infante, Ivan; Manna, Liberato; Polavarapu, Lakshminarayana Wiley (2023)
      Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, and have emerged as promising candidates for high-performance solar cells, ...

    • openAccess   Ligand-free synthesis of aluminum-doped zinc oxide nanocrystals and their use as optical spacers in color-tuned highly efficient organic solar cells 

      Gaceur, Meriem; Dkhil, Sadok Ben; Duché, David; Bencheikh Aboura, Fatima; Simon, Jean-Jacques; Escoubas, Ludovic; Mansour, Mahdi; Guerrero, Antonio; Garcia-Belmonte, Germà; Liu, Xianjie; Fahlmann, Mats; Dachraoui, Walid; Diallo, Abdou Karim; Videlot-Ackermann, Christine; Margeat, Olivier; Ackermann, Jörg Wiley (2016)
      The color of polymer solar cells using an opaque electrode is given by the refl ected light, which depends on the composition and thickness of each layer of the device. Metal-oxide-based optical spacers are intensively ...

    • openAccess   Manganese Defective Clustering: Influence on the Spectroscopic Features of Ceria-Based Nanomaterials 

      Amaral, D.C.; Rosa Rocha, Leandro Silva; Granone, Luis Ignacio; Lage, M.M.; Churio, Maria Sandra; Sanchez, M. D.; Longo, Elson; Nascimento, H. M. S.; Assis, Marcelo de; Moura, F.; Ponce, M. A. American Chemical Society (2023-07-21)
      The influence of manganese modification on the spectroscopic features of manganese-doped CeO2 systems synthesized by the microwave-assisted hydrothermal route and their correlation with the presence of O defective structures ...

    • openAccess   Photoluminescence Properties of Nanocrystals 

      Cavalcante, Laécio Santos; Sczancoski, Júlio César; Varela, José A.; Longo, Elson; Andres, Juan; Rout, S. K. Hindawi Publishing Corporation (2012)
      Photoluminescence (PL) is an optical phenomenon exhibited by some semiconductor materials when excited by an electromagnetic radiation source. After the excitation and recombination processes, these kinds of materials are ...

    • openAccess   Single Step Deposition of an Interacting Layer of Perovskite Matrix with Embedded Quantum Dots 

      Ngo, Thi Tuyen; Suárez, Isaac; S. Sánchez, Rafael; Martínez-Pastor, Juan P.; Mora-Sero, Ivan Royal Society of Chemistry (2016)
      Hybrid lead halide perovskite (PS) derivatives have emerged as very promising materials for the development of optoelectronic devices in the last few years. At the same time, inorganic nanocrystals with quantum confinement ...

    • openAccess   Single-Exciton Amplified Spontaneous Emission in Thin Films of CsPbX3 (X = Br, I) Perovskite Nanocrystals 

      Navarro-Arenas, Juan; Suárez, Isaac; Chirvony, Vladimir; Gualdrón Reyes, Andrés Fabián; Mora-Sero, Ivan; Martínez-Pastor, Juan P. American Chemical Society (2019-09-23)
      CsPbX3 perovskite nanocrystals (PNCs) have emerged as an excellent material for stimulated emission purposes, with even more prospective applications than conventional colloidal quantum dots. However, a better understanding ...

    • openAccess   Stabilization of Black FAPbI3 Perovskite by Interaction with the Surface of the Polymorphic Phase α-PbO 

      Echeverría-Arrondo, Carlos; muhammed, kunnummal; Masi, Sofia; Mora-Sero, Ivan Wiley-VCH GmbH (2023-02-03)
      The black phase of formamidinium lead iodide, FAPbI3, is optically active and promising for optoelectronics applications. However, it is difficult to synthesize and stabilize at room temperature since it thermodynamically ...

    • openAccess   Structural and electrochemical analysis of CIGS: Cr crystalline nanopowders and thin films deposited onto ITO substrates 

      Saber, Suzan; Marí Soucase, Bernabé; Andrio, Andreu; Escorihuela, Jorge; Khattab, Nagwa; Eid, Ali; El Nahrawy, Amany; Abo-Aly, Mohamed; Compañ, Vicente MDPI (2021-04-23)
      A new approach for the synthesis of nanopowders and thin films of CuInGaSe2 (CIGS) chalcopyrite material doped with different amounts of Cr is presented. The chalcopyrite material CuInxGa1 − xSe2 was doped using Cr to form ...

    • openAccess   Switchable All Inorganic Halide Perovskite Nanocrystalline Photoelectrodes for Solar-Driven Organic Transformations 

      Fernandez-Climent, Roser; Gualdrón Reyes, Andrés Fabián; García-Tecedor, Miguel; Mesa, Camilo A.; Cardenas-Morcoso, Drialys; Montañés, Laura; Barea, Eva M; Mas, Elena; Julian-Lopez, Beatriz; Mora-Sero, Ivan; Gimenez, Sixto Wiley (2021-10-30)
      All inorganic halide perovskite nanocrystals (NCs) are considered as fascinating materials for a wide range of optoelectronic applications encompassing photovoltaics, lasing, sensing, and photocatalysis due to their ...

    • openAccess   Synthesis of Air-Stable CdSe/ZnS Core–Shell Nanoplatelets with Tunable Emission Wavelength 

      Polovitsyn, Anatolii; Dang, Zhiya; Movilla, Jose L.; Martín García, Beatriz; Khan, Ali Hossain; Bertrand, Guillaume H. V.; Brescia, Rosaria; Moreels, Iwan American Chemical Society (2017)
      In the past few years, several protocols have been reported on the synthesis of CdSe nanoplatelets with narrow photoluminescence (PL) spectrum, high PL quantum efficiency, and short exciton lifetime. The corresponding ...

    • openAccess   The contribution of NMR spectroscopy in understanding perovskite stabilization phenomena 

      Aiello, Federica; Masi, Sofia MDPI (2021-08-08)
      Although it has been exploited since the late 1900s to study hybrid perovskite materials, nuclear magnetic resonance (NMR) spectroscopy has only recently received extraordinary research attention in this field. This very ...