A5091202440- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Luminescence Properties of Advanced Materials
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Thermal Radiation and Cooling Technologies
- Strong Light-Matter Interactions
- Solid-state spectroscopy and crystallography
- Optical properties and cooling technologies in crystalline materials
- Microwave Dielectric Ceramics Synthesis
University of Cagliari
2022-2024
Helmholtz-Zentrum Berlin für Materialien und Energie
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2022-2023
Layered 2D perovskites are making inroads as materials for photovoltaics and light emitting diodes, but their photophysics is still lively debated. Although large exciton binding energies should hinder charge separation, significant evidence has been uncovered an abundance of free carriers among optical excitations. Several explanations have proposed, like dissociation at grain boundaries or polaron formation, without clarifying yet if excitons form then dissociate, the formation prevented...
Inorganic metal halide perovskites such as CsPbI3 are promising for high-performance, reproducible, and robust solar cells. However, inorganic sensitive to humidity, which causes the transformation from black phase yellow δ, non-perovskite phase. Such instability has been a significant challenge long-term operational stability. Here, surface dimensionality reduction strategy is reported, using 2-(4-aminophenyl)ethylamine cation construct Dion-Jacobson 2D that covers of 3D perovskite...
Abstract Stability issues could prevent lead halide perovskite solar cells (PSCs) from commercialization despite it having a comparable power conversion efficiency (PCE) to silicon cells. Overcoming drawbacks affecting their long‐term stability is gaining incremental importance. Excess iodide (PbI 2 ) causes degradation, although aids in crystal growth and defect passivation. Herein, we synthesized functionalized oxo‐graphene nanosheets (Dec‐oxoG NSs) effectively manage the excess PbI ....
Abstract Stability issues could prevent lead halide perovskite solar cells (PSCs) from commercialization despite it having a comparable power conversion efficiency (PCE) to silicon cells. Overcoming drawbacks affecting their long‐term stability is gaining incremental importance. Excess iodide (PbI 2 ) causes degradation, although aids in crystal growth and defect passivation. Herein, we synthesized functionalized oxo‐graphene nanosheets (Dec‐oxoG NSs) effectively manage the excess PbI ....
A radiometric measurement of time-resolved photoluminescence that helps to identify unwanted photocarrier decay in hybrid perovskite thin-films for solar cell applications.
Lead-free double perovskites are ideal lighting materials, capable of white light emission with unity efficiency. We demonstrate that the key ingredients for efficient bismuth and silver at least 0.1% fraction each.
Abstract Metal halide perovskites have emerged as promising materials for low‐threshold lasers, ideally suited integrated optical circuits due to their easy fabrication, tunable wavelength, and seamless on‐chip integration. Exciton lasing, electron‐hole population inversion, polariton condensation superfluorescence been proposed explain the low threshold. Fundamental discriminate lasing mechanisms is knowledge of material's absorption/gain spectrum in stimulated emission regime, a difficult...
Abstract Layered 2D perovskites are making inroads as materials for photovoltaics and light emitting diodes, but the photophysics of their optical excitations is still debated. Although large exciton binding energies should hinder charge separation, significant evidence has been uncovered an abundance free carriers. Several explanations have proposed, like splitting at grain boundaries or polaron formation, without clarifying yet if excitons form then split, formation prevented by competing...
Space-Confined 2D and Quasi-2D Halide Perovskite Single CrystalsSelene Matta a, Valeria Demontis Angelica Simbula Silvia Liscia Federico Pitzalis Riccardo Pau b, Stefano Lai Rui Wu Emanuele Domenico Cadeddu Luyan Daniela Marongiu Francesco Quochi Michele Saba Andrea Mura Giovanni Luigi Carlo Bongiovanni aa Department of Physics, University Cagliari, Cittadella Universitaria di Monserrato SP Sestu km 0.7 09042 Monserrato(CA) Italyb Zernike Institute for Advanced Materials, Groningen,...