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27 results on '"Binda, Maddalena"'

6. Platinum diimine-dithiolate complexes as a new class of photoconducting compounds for pristine photodetectors: case study on [Pt(bipy)(Naph-edt)] (bipy = 2,2′-bipyridine; Naph-edt2− = 2-naphthylethylene-1,2-dithiolate)

Author

Aragoni, M. Carla, primary, Arca, Massimiliano, additional, Binda, Maddalena, additional, Caltagirone, Claudia, additional, Lippolis, Vito, additional, Natali, Dario, additional, Podda, Enrico, additional, Sampietro, Marco, additional, and Pintus, Anna, additional

Published
2021
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8. Photoconducting Devices with Response in the Visible–Near-Infrared Region Based on Neutral Ni Complexes of Aryl-1,2-dithiolene Ligands

Author

Pintus, Anna, primary, Ambrosio, Lucia, additional, Aragoni, M. Carla, additional, Binda, Maddalena, additional, Coles, Simon J., additional, Hursthouse, Michael B., additional, Isaia, Francesco, additional, Lippolis, Vito, additional, Meloni, Giammarco, additional, Natali, Dario, additional, Orton, James B., additional, Podda, Enrico, additional, Sampietro, Marco, additional, and Arca, Massimiliano, additional

Published
2020
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9. Platinum diimine-dithiolate complexes as a new class of photoconducting compounds for pristine photodetectors: case study on [Pt(bipy)(Naph-edt)] (bipy = 2,2′-bipyridine; Naph-edt2− = 2-naphthylethylene-1,2-dithiolate).

Author

Aragoni, M. Carla, Arca, Massimiliano, Binda, Maddalena, Caltagirone, Claudia, Lippolis, Vito, Natali, Dario, Podda, Enrico, Sampietro, Marco, and Pintus, Anna

Subjects
PHOTODETECTORS, PLATINUM, ELECTRONIC excitation, PLATINUM compounds
Abstract

The photoconducting properties of platinum diimine-dithiolate complex [Pt(bipy)(Naph-edt)] (1; bipy = 2,2′-bipyridine; Naph-edt2− = 2-naphthylethylene-1,2-dithiolate) were investigated. DFT calculations on a model assembly with four complex units suggest that the high external quantum efficency measured on a prototype photodetector correlates with the intermolecular character of electronic excitations in the visible region. [ABSTRACT FROM AUTHOR]

Published
2021
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11. Hyperbranched Quasi-1D Nanostructures for Solid-State Dye-Sensitized Solar Cells

Author

Passoni, Luca, Ghods, Farbod, Docampo, Pablo, Abrusci, Agnese, Martí-Rujas, Javier, Ghidelli, Matteo, Divitini, Giorgio, Ducati, Caterina, Binda, Maddalena, Guarnera, Simone, Li Bassi, Andrea, Casari, Carlo Spartaco, Snaith, Henry J., Petrozza, Annamaria, and Di Fonzo, Fabio

Abstract

In this work we demonstrate hyperbranched nanostructures, grown by pulsed laser deposition, composed of one-dimensional anatase single crystals assembled in arrays of high aspect ratio hierarchical mesostructures. The proposed growth mechanism relies on a two-step process: self-assembly from the gas phase of amorphous TiO2clusters in a forest of tree-shaped hierarchical mesostructures with high aspect ratio; oriented crystallization of the branches upon thermal treatment. Structural and morphological characteristics can be optimized to achieve both high specific surface area for optimal dye uptake and broadband light scattering thanks to the microscopic feature size. Solid-state dye sensitized solar cells fabricated with arrays of hyperbranched TiO2nanostructures on FTO-glass sensitized with D102 dye showed a significant 66% increase in efficiency with respect to a reference mesoporous photoanode and reached a maximum efficiency of 3.96% (among the highest reported for this system). This result was achieved mainly thanks to an increase in photogenerated current directly resulting from improved light harvesting efficiency of the hierarchical photoanode. The proposed photoanode overcomes typical limitations of 1D TiO2nanostructures applied to ss-DSC and emerges as a promising foundation for next-generation high-efficiency solid-state devices comprosed of dyes, polymers, or quantum dots as sensitizers.

Published
2024
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12. Solar Cells: Ion Migration and the Role of Preconditioning Cycles in the Stabilization of the J -V Characteristics of Inverted Hybrid Perovskite Solar Cells (Adv. Energy Mater. 2/2016)

Author

De Bastiani, Michele, primary, Dell'Erba, Giorgio, additional, Gandini, Marina, additional, D'Innocenzo, Valerio, additional, Neutzner, Stefanie, additional, Kandada, Ajay Ram Srimath, additional, Grancini, Giulia, additional, Binda, Maddalena, additional, Prato, Mirko, additional, Ball, James M., additional, Caironi, Mario, additional, and Petrozza, Annamaria, additional

Published
2016
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13. Metal-Free Benzodithiophene-Containing Organic Dyes for Dye-Sensitized Solar Cells

Author

Longhi, Elena, Bossi, Alberto, Di Carlo, Gabriele, Maiorana, Stefano, De Angelis, Filippo, Salvatori, Paolo, Petrozza, Annamaria, Binda, Maddalena, Roiati, Vittoria, Mussini, Patrizia Romana, Baldoli, Clara, and Licandro, Emanuela

Subjects
Solar cells, Organic Chemistry, Solid state structures, Dyes/pigments, Physical and Theoretical Chemistry, Donor-acceptor systems, Sensitizers
Abstract

Two new metal-free organic dyes, CR29 and CR52, with high extinction coefficients in the visible spectral region between 400-650 nm, have been synthesized. The donor-acceptor structure of the dyes feature benzodithiophene moieties BDT1 and BDT as rigid ?-conjugated spacers, which have so far been very little studied for dye-sensitized solar cell (DSSC) applications. DFT/TDDFT calculations have been employed to guide the design of the chromophores as well as to shed light on their electronic and optical properties. Photophysical and electrochemical characterization studies have been carried out to gather information on the charge transfer processes occurring at the dye-semiconductor interfaces. Under standard AM 1.5 conditions, DSSC sensitized with CR29 showed good conversion efficiencies: 5.14 % in the liquid electrolyte cell setup and 2.47 % in the solid-state DSSC.

Published
2013

14. Ion Migration and the Role of Preconditioning Cycles in the Stabilization of the J–V Characteristics of Inverted Hybrid Perovskite Solar Cells

Author

De Bastiani, Michele, primary, Dell'Erba, Giorgio, additional, Gandini, Marina, additional, D'Innocenzo, Valerio, additional, Neutzner, Stefanie, additional, Kandada, Ajay Ram Srimath, additional, Grancini, Giulia, additional, Binda, Maddalena, additional, Prato, Mirko, additional, Ball, James M., additional, Caironi, Mario, additional, and Petrozza, Annamaria, additional

Published
2015
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16. A fulleropyrrolidine–squaraine blue dyad: synthesis and application as an organic light detector

Author

Salice, Patrizio, primary, Ronchi, Elisabetta, additional, Iacchetti, Antonio, additional, Binda, Maddalena, additional, Natali, Dario, additional, Gomulya, Widianta, additional, Manca, Marianna, additional, Loi, Maria Antonietta, additional, Iurlo, Matteo, additional, Paolucci, Francesco, additional, Maggini, Michele, additional, Pagani, Giorgio A., additional, Beverina, Luca, additional, and Menna, Enzo, additional

Published
2014
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19. Ion Migration and the Role of Preconditioning Cycles in the Stabilization of the J- V Characteristics of Inverted Hybrid Perovskite Solar Cells.

Author

De Bastiani, Michele, Dell'Erba, Giorgio, Gandini, Marina, D'Innocenzo, Valerio, Neutzner, Stefanie, Kandada, Ajay Ram Srimath, Grancini, Giulia, Binda, Maddalena, Prato, Mirko, Ball, James M., Caironi, Mario, and Petrozza, Annamaria

Subjects
SOLAR cells, PEROVSKITE, ELECTRIC charge, DIRECT energy conversion, SOLAR energy
Abstract

Charge extracting layers play a key role in the elimination of hysteresis from J–V characteristics of inverted hybrid perovskite solar cells. Methanofullerene electron extracting layers stabilize short‐circuit photocurrents from the very first J–V scan, while preconditioning cycles are needed to stabilize the open‐circuit voltage owing to interaction between migrating iodide ions and the charge extraction layer. [ABSTRACT FROM AUTHOR]

Published
2016
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20. Metal-Free Benzodithiophene-Containing Organic Dyes for Dye-Sensitized Solar Cells

Author

Longhi, Elena, primary, Bossi, Alberto, additional, Di Carlo, Gabriele, additional, Maiorana, Stefano, additional, De Angelis, Filippo, additional, Salvatori, Paolo, additional, Petrozza, Annamaria, additional, Binda, Maddalena, additional, Roiati, Vittoria, additional, Mussini, Patrizia Romana, additional, Baldoli, Clara, additional, and Licandro, Emanuela, additional

Published
2012
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23. The effect of selective interactions at the interface of polymer–oxide hybrid solar cells

Author

Canesi, Eleonora V., primary, Binda, Maddalena, additional, Abate, Antonio, additional, Guarnera, Simone, additional, Moretti, Luca, additional, D'Innocenzo, Valerio, additional, Sai Santosh Kumar, R., additional, Bertarelli, Chiara, additional, Abrusci, Agnese, additional, Snaith, Henry, additional, Calloni, Alberto, additional, Brambilla, Alberto, additional, Ciccacci, Franco, additional, Aghion, Stefano, additional, Moia, Fabio, additional, Ferragut, Rafael, additional, Melis, Claudio, additional, Malloci, Giuliano, additional, Mattoni, Alessandro, additional, Lanzani, Guglielmo, additional, and Petrozza, Annamaria, additional

Published
2012
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25. Multi-Layer Organic Squaraine-Based Photodiode for Indirect X-Ray Detection.

Author

Iacchetti, Antonio, Binda, Maddalena, Natali, Dario, Giussani, Mattia, Beverina, Luca, Fiorini, Carlo, Peloso, Roberta, and Sampietro, Marco

Subjects
*DARK currents (Electric), *PHOTODIODES, *SCINTILLATORS, *ORGANIC semiconductors, *POLYMERS
Abstract

The paper presents an organic-based photodiode coupled to a CsI(Tl) scintillator to realize an X-ray detector. A suitable blend of an indolic squaraine derivative and of fullerene derivative has been used for the photodiode, thus allowing external quantum efficiency in excess of 10% at a wavelength of 570 nm, well matching the scintillator output spectrum. Thanks to the additional deposition of a 15 nm thin layer of a suitable low electron affinity polymer, carriers injection from the metal into the organic semiconductor has been suppressed, and dark current density as low as 1~nA/cm^2 has been obtained, which is comparable to standard Si-based photodiodes. By using a collimated X-ray beam impinging onto the scintillator mounted over the photodiode we have been able to measure current variations in the order of 150 pA on a dark current floor of less than 50 pA when operating the X-ray tube in switching mode, thus proving the feasibility of indirect X-ray detection by means of organic semiconductors. [ABSTRACT FROM PUBLISHER]

Published
2012
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26. Platinum diimine-dithiolate complexes as a new class of photoconducting compounds for pristine photodetectors: case study on [Pt(bipy)(Naph-edt)] (bipy = 2,2'-bipyridine; Naph-edt 2- = 2-naphthylethylene-1,2-dithiolate).

Author

Aragoni MC, Arca M, Binda M, Caltagirone C, Lippolis V, Natali D, Podda E, Sampietro M, and Pintus A

Abstract

The photoconducting properties of platinum diimine-dithiolate complex [Pt(bipy)(Naph-edt)] (1; bipy = 2,2'-bipyridine; Naph-edt2- = 2-naphthylethylene-1,2-dithiolate) were investigated. DFT calculations on a model assembly with four complex units suggest that the high external quantum efficency measured on a prototype photodetector correlates with the intermolecular character of electronic excitations in the visible region.

Published
2021
Full Text
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27. Hyperbranched quasi-1D nanostructures for solid-state dye-sensitized solar cells.

Author

Passoni L, Ghods F, Docampo P, Abrusci A, Martí-Rujas J, Ghidelli M, Divitini G, Ducati C, Binda M, Guarnera S, Li Bassi A, Casari CS, Snaith HJ, Petrozza A, and Di Fonzo F

Abstract

In this work we demonstrate hyperbranched nanostructures, grown by pulsed laser deposition, composed of one-dimensional anatase single crystals assembled in arrays of high aspect ratio hierarchical mesostructures. The proposed growth mechanism relies on a two-step process: self-assembly from the gas phase of amorphous TiO2 clusters in a forest of tree-shaped hierarchical mesostructures with high aspect ratio; oriented crystallization of the branches upon thermal treatment. Structural and morphological characteristics can be optimized to achieve both high specific surface area for optimal dye uptake and broadband light scattering thanks to the microscopic feature size. Solid-state dye sensitized solar cells fabricated with arrays of hyperbranched TiO2 nanostructures on FTO-glass sensitized with D102 dye showed a significant 66% increase in efficiency with respect to a reference mesoporous photoanode and reached a maximum efficiency of 3.96% (among the highest reported for this system). This result was achieved mainly thanks to an increase in photogenerated current directly resulting from improved light harvesting efficiency of the hierarchical photoanode. The proposed photoanode overcomes typical limitations of 1D TiO2 nanostructures applied to ss-DSC and emerges as a promising foundation for next-generation high-efficiency solid-state devices comprosed of dyes, polymers, or quantum dots as sensitizers.

Published
2013
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