A5080602865- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Electronic and Structural Properties of Oxides
- Photonic and Optical Devices
- Conducting polymers and applications
- Nonlinear Optical Materials Studies
- Thermal properties of materials
- Gyrotron and Vacuum Electronics Research
- Advanced Fiber Optic Sensors
- GaN-based semiconductor devices and materials
- Nanocluster Synthesis and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Acoustic Wave Resonator Technologies
- Advanced Fiber Laser Technologies
- Solid-state spectroscopy and crystallography
- Graphene research and applications
- Graphene and Nanomaterials Applications
- Membrane Separation and Gas Transport
- Advancements in Battery Materials
- Advanced Thermoelectric Materials and Devices
- Magnetic and transport properties of perovskites and related materials
- Photonic Crystal and Fiber Optics
- Advancements in Solid Oxide Fuel Cells
Universidade Estadual de Campinas (UNICAMP)
2017-2024
Centro de Tecnologia da Informação Renato Archer
2021
Abstract In the last few years, research on dye-sensitised devices has been focused development of solar cells, based CH 3 NH PbX (X = I − , Br Cl ) composites with perovskite structure. The deposition thin films is usually carried out by solution-based processes using spin-coating techniques that result in production high quality films. Solar cells made this method exceed 20% efficiency, potential for use large scale through ink print or screen printing techniques. As an alternative route,...
Aqueous colloidal silver nanoparticles have substantial potential in biological application as markers and antibacterial agents surface-enhanced Raman spectroscopy applications. A simple method of fabrication encapsulation into an inert shell is great importance today to make their use ubiquitous. Here we show that colloids silver-core/silica-shell can be easily fabricated by a laser-ablation-assisted chemical reduction sizes tuned the range 2.5 6.3 nm simply choosing proper water-ethanol...
Lead iodide (PbI2) is a precursor for the preparation of organolead perovskite (CH3NH3PbI3), which has been used in fabrication highly efficient solar cells. In this work, novel route deposition PbI2 thin films performed by rf sputtering target made from compressed powder. Atomic force microscopy (AFM) and scanning electron (SEM) revealed that produced were uniform, pinhole-free, polycrystalline, had low roughness. A small concentration Pb nanocrystals observed within attributed to...
Silica optical microspheres often exhibit ultra-high quality factors, yet their group velocity dispersion, which is crucial for nonlinear optics applications, can only be coarsely tuned. We experimentally demonstrate that group-velocity dispersion of a silica microsphere engineered by coating it with conformal nanometric layers alumina preserving its factors (∼107) at telecom wavelengths. Using the atomic layer deposition technique dielectric coating, ensures nm-level thickness control, we...
Abstract Bismuth triiodide (BiI 3 ) has been studied in recent years with the aim of developing lead-free semiconductors for photovoltaics. It also appeared X-ray detectors due to high density element. This material is attractive as an active layer solar cells, or may be feasible conversion into perovskite-like (MA Bi 2 I 9 ), being suitable photovoltaic applications. In this study, we report on thermomechanical properties (stress, hardness, coefficient thermal expansion, and biaxial reduced...
In the last two decades, many experiments were conducted in self-organization of nanocrystals into two- and three-dimensional (3D) superlattices synthesized characterized by different techniques, revealing their unusual properties. Among all characterization X-ray diffraction (XRD) is one that has allowed confirmation 3D superlattice formation due to presence sharp intense peaks. this work, we study self-organized quantum dots PbS prepared dropping a monodispersed colloidal solution on glass...
Espelhos de Bragg são heteroestruturas alta e seletiva refletividade. O objetivo desse projeto é a simulação, confecção caracterizadação um espelho óptico feito com camadas Al2O/TiO2 outro Al2O3/ZnO. A simulação foi feita no software Mathematica™ caracterização pela medida da refletividade (para ambos espelhos) também difração raios-x, para o estudo camada ZnO.
We experimentally demonstrate that the group-velocity dispersion of silica microspheres can be engineered by coating it with nanometer-thick layers alumina (Al 2 O3). The ultra-high optical quality factor (> 10 7 ) achieved allows for generation frequency combs.