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  1. Book ; Online: Organic and Hybrid Materials for Photovoltaic and Photonic Applications

    Virgili, Tersilla / Pasini, Mariacecilia

    2023  

    Keywords Research & information: general ; Physics ; Optical physics ; conjugated polymers ; Amplified Spontaneous Emission ; optically pumped laser ; optical gain ; active waveguides ; molecular engineering ; polymer donors ; high hole mobility ; polymer solar cells ; BODIPY ; optoelectronics ; photonics ; solar cells ; organic dyes ; conjugated polyelectrolytes ; inverted organic solar cells ; anode interfacial layers ; organic molecules ; single crystals ; molecular packing ; lasers ; optical resonators ; transient absorption spectroscopy ; stimulated emission ; nanoparticles ; mesoparticles ; cellulose nanocrystals ; nanocellulose ; pyrene ; organic light-emitting material ; reductive amination ; nanocellulose functionalization ; nanocellulose fluorescence ; organic solar cells ; green solvents ; non-halogenated solvents ; exaction diffusion ; photoluminescence quenching ; low-dimensional ; metal halide perovskite ; photoluminescence ; stimulus-responsive ; elastic property ; Sn2+-PPHs metal complex ; UV-Vis ; XRD and FTIR analyses ; optical property ; bandgap analysis
    Language English
    Size 1 electronic resource (190 pages)
    Publisher MDPI - Multidisciplinary Digital Publishing Institute
    Publishing place Basel
    Document type Book ; Online
    Note English
    HBZ-ID HT030722372
    ISBN 9783036568782 ; 3036568786
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: Enhancement of Photoluminescence Properties via Polymer Infiltration in a Colloidal Photonic Glass.

    Chiappini, Andrea / Faccialà, Davide / Novikova, Nina I / Sardar, Samim / D'Andrea, Cosimo / Scavia, Guido / Botta, Chiara / Virgili, Tersilla

    Molecules (Basel, Switzerland)

    2024  Volume 29, Issue 3

    Abstract: Photonic glasses (PGs) based on the self-assembly of monosized nanoparticles can be an effective tool for realizing disordered structures capable of tailoring light diffusion due to the establishment of Mie resonances. In particular, the wavelength ... ...

    Abstract Photonic glasses (PGs) based on the self-assembly of monosized nanoparticles can be an effective tool for realizing disordered structures capable of tailoring light diffusion due to the establishment of Mie resonances. In particular, the wavelength position of these resonances depends mainly on the morphology (dimension) and optical properties (refractive index) of the building blocks. In this study, we report the fabrication and optical characterization of photonic glasses obtained via a self-assembling technique. Furthermore, we have demonstrated that the infiltration of these systems with a green-emitting polymer enhances the properties of the polymer, resulting in a large increase in its photoluminescence quantum yield and a 3 ps growing time of the photoluminescence time decay Finally, the development of the aforementioned system can serve as a suitable low-cost platform for the realization of lasers and fluorescence-based bio-sensors.
    Language English
    Publishing date 2024-01-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules29030654
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Asymmetric AZA-BODIPY with Optical Gain in the Near-Infrared Region.

    Virgili, Tersilla / Ganzer, Lucia / Botta, Chiara / Squeo, Benedetta Maria / Pasini, Mariacecilia

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 14

    Abstract: In recent years, there has been a lot of interest in the development of organic compounds emitting in the near-infrared (NIR) region due to their stimulating applications, such as biosensing and light detection and ranging (LiDAR). Moreover, a lot of ... ...

    Abstract In recent years, there has been a lot of interest in the development of organic compounds emitting in the near-infrared (NIR) region due to their stimulating applications, such as biosensing and light detection and ranging (LiDAR). Moreover, a lot of effort has been devoted to finding organic emitters with optical gain in the NIR region for lasing applications. In this paper, we present the ultrafast spectroscopy of an asymmetric AZA-BODIPY molecule that shows relevant photophysical changes moving from a diluted solution to a concentrated solution and to a spin-coated film. The diluted solution and the spin-coated film show a bleaching band and a stimulated emission band in the visible region, while the very concentrated solution displays a broad (150 nm) and long-living (more than 400 ps) optical gain band in the NIR region, centered at 900 nm. Our results pave the way for a new organic laser system in a near-infrared spectral region.
    MeSH term(s) Boron Compounds/chemistry ; Spectrum Analysis
    Chemical Substances Boron Compounds ; azaBDPBA compound
    Language English
    Publishing date 2022-07-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27144538
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Dephasing Processes in the Molecular Dye Lumogen-F Orange Characterized by Two-Dimensional Electronic Spectroscopy.

    Russo, Mattia / McGhee, Kirsty E / Virgili, Tersilla / Lidzey, David G / Cerullo, Giulio / Maiuri, Margherita

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 20

    Abstract: Molecular dyes are finding more and more applications in photonics and quantum technologies, such as polaritonic optical microcavities, organic quantum batteries and single-photon emitters for quantum sensing and metrology. For all these applications, it ...

    Abstract Molecular dyes are finding more and more applications in photonics and quantum technologies, such as polaritonic optical microcavities, organic quantum batteries and single-photon emitters for quantum sensing and metrology. For all these applications, it is of crucial importance to characterize the dephasing mechanisms. In this work we use two-dimensional electronic spectroscopy (2DES) to study the temperature dependent dephasing processes in the prototypical organic dye Lumogen-F orange. We model the 2DES maps using the Bloch equations for a two-level system and obtain a dephasing time T
    MeSH term(s) Coloring Agents ; Citrus sinensis ; Spectrum Analysis ; Diffusion ; Electronics
    Chemical Substances Coloring Agents
    Language English
    Publishing date 2022-10-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27207095
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: BODIPY-Based Molecules, a Platform for Photonic and Solar Cells.

    Squeo, Benedetta Maria / Ganzer, Lucia / Virgili, Tersilla / Pasini, Mariacecilia

    Molecules (Basel, Switzerland)

    2020  Volume 26, Issue 1

    Abstract: The 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based molecules have emerged as interesting material for optoelectronic applications. The facile structural modification of BODIPY core provides an opportunity to fine-tune its photophysical and ... ...

    Abstract The 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY)-based molecules have emerged as interesting material for optoelectronic applications. The facile structural modification of BODIPY core provides an opportunity to fine-tune its photophysical and optoelectronic properties thanks to the presence of eight reactive sites which allows for the developing of a large number of functionalized derivatives for various applications. This review will focus on BODIPY application as solid-state active material in solar cells and in photonic devices. It has been divided into two sections dedicated to the two different applications. This review provides a concise and precise description of the experimental results, their interpretation as well as the conclusions that can be drawn. The main current research outcomes are summarized to guide the readers towards the full exploitation of the use of this material in optoelectronic applications.
    MeSH term(s) Boron Compounds/chemistry ; Fluorescent Dyes/chemistry ; Optics and Photonics ; Photons ; Solar Energy
    Chemical Substances 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene ; Boron Compounds ; Fluorescent Dyes
    Language English
    Publishing date 2020-12-31
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules26010153
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Multilayers of Carbodithioate and Sulfide-Linked CdSe Nanocrystals: Progressive Increase of Exciton Delocalization

    Vercelli, B / Virgili, T / Pasini, M / Berlin, A / Zotti, G

    Journal of physical chemistry. 2019 Aug. 20, v. 123, no. 37

    2019  

    Abstract: Multilayers of sulfur-based anchoring group linkers and CdSe nanocrystals (NCs) were realized on indium-tin oxide substrate via layer-by-layer alternation. The materials were investigated by UV–vis and Fourier transform infrared spectroscopy, ... ...

    Abstract Multilayers of sulfur-based anchoring group linkers and CdSe nanocrystals (NCs) were realized on indium-tin oxide substrate via layer-by-layer alternation. The materials were investigated by UV–vis and Fourier transform infrared spectroscopy, photoluminescence, and photoconductivity. We found that the change of NC packing during multilayer build-up produces a progressive increase of exciton delocalization. In fact during multilayer deposition, the first excitonic peak of NCs shifts progressively toward longer wavelengths. We found a linear relation between the optical band gap shift (ΔEgₙ) and the inverse of the number of CdSe-NC layers (n) for n > 2, in particular, the decrease of its value for the infinite multilayer from one of the solution (2.10 eV) goes from 18 meV for the 1,2-ethylene-bis(dithiocarbamate) linker to 66 meV for sulfide dianions, corresponding to an apparent increase of the exciton radius of 0.20 and 0.85 nm, respectively.
    Keywords Fourier transform infrared spectroscopy ; cadmium ; indium tin oxide ; nanocrystals ; photoluminescence ; physical chemistry ; selenides ; ultraviolet-visible spectroscopy ; wavelengths
    Language English
    Dates of publication 2019-0820
    Size p. 23159-23166.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.9b04276
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Optical Gain in Semiconducting Polymer Nano and Mesoparticles.

    Geoghegan, Mark / Mróz, Marta M / Botta, Chiara / Parrenin, Laurie / Brochon, Cyril / Cloutet, Eric / Pavlopoulou, Eleni / Hadziioannou, Georges / Virgili, Tersilla

    Molecules (Basel, Switzerland)

    2021  Volume 26, Issue 4

    Abstract: The presence of excited-states and charge-separated species was identified through UV and visible laser pump and visible/near-infrared probe femtosecond transient absorption spectroscopy in spin coated films of poly[ ...

    Abstract The presence of excited-states and charge-separated species was identified through UV and visible laser pump and visible/near-infrared probe femtosecond transient absorption spectroscopy in spin coated films of poly[
    MeSH term(s) Carbazoles/chemistry ; Nanoparticles/chemistry ; Polymers/chemistry ; Semiconductors ; Sulfur Compounds/chemistry
    Chemical Substances Carbazoles ; Polymers ; Sulfur Compounds ; poly(N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)
    Language English
    Publishing date 2021-02-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules26041138
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Photo-Physical Behaviour of CdSe Nanocrystals/Bis(dithiocarbamate) Linker Multilayered Hybrid Systems.

    Vercelli, B / Angella, G / Virgili, T / López Suarez, I / Pasini, M

    Journal of nanoscience and nanotechnology

    2015  Volume 15, Issue 5, Page(s) 3540–3544

    Abstract: Multilayered films composed by CdSe Nanocrystals (NCs) interlinked by ethylene-1,2-bis(dithiocarbamate) or adipate anions were prepared on ITO glass via layer-by-layer alternation. The films were analyzed by UV-vis, TEM, Photoluminescence (PL) emission ... ...

    Abstract Multilayered films composed by CdSe Nanocrystals (NCs) interlinked by ethylene-1,2-bis(dithiocarbamate) or adipate anions were prepared on ITO glass via layer-by-layer alternation. The films were analyzed by UV-vis, TEM, Photoluminescence (PL) emission and Pump-Probe spectroscopy. While the PL emission of the two samples present no differences, femtosecond Pump-probe experiments reveal an higher charge generation efficiency in bis(dithiocarbamate) based films than in dicarboxylate ones.
    Language English
    Publishing date 2015-10-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1533-4899
    ISSN (online) 1533-4899
    DOI 10.1166/jnn.2015.9840
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Deep Blue Light Amplification from a Novel Triphenylamine Functionalized Fluorene Thin Film.

    Virgili, Tersilla / Anni, Marco / Giorgi, Maria Luisa De / Varillas, Rocio Borrego / Squeo, Benedetta M / Pasini, Mariacecilia

    Molecules (Basel, Switzerland)

    2019  Volume 25, Issue 1

    Abstract: The development of high performance optically pumped organic lasers operating in the deep blue still remains a big challenge. In this paper, we have investigated the photophysics and the optical gain characteristics of a novel fluorene oligomer ... ...

    Abstract The development of high performance optically pumped organic lasers operating in the deep blue still remains a big challenge. In this paper, we have investigated the photophysics and the optical gain characteristics of a novel fluorene oligomer functionalized by four triphenylamine (TPA) groups. By ultrafast spectroscopy we found a large gain spectral region from 420 to 500 nm with a maximum gain cross-section of 1.5 × 10
    MeSH term(s) Aniline Compounds/chemistry ; Fluorenes/chemistry ; Light ; Luminescence ; Molecular Probes/chemistry ; Time Factors
    Chemical Substances Aniline Compounds ; Fluorenes ; Molecular Probes ; fluorene (3Q2UY0968A)
    Language English
    Publishing date 2019-12-24
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules25010079
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Superabsorption in an organic microcavity: Toward a quantum battery.

    Quach, James Q / McGhee, Kirsty E / Ganzer, Lucia / Rouse, Dominic M / Lovett, Brendon W / Gauger, Erik M / Keeling, Jonathan / Cerullo, Giulio / Lidzey, David G / Virgili, Tersilla

    Science advances

    2022  Volume 8, Issue 2, Page(s) eabk3160

    Abstract: The rate at which matter emits or absorbs light can be modified by its environment, as markedly exemplified by the widely studied phenomenon of superradiance. The reverse process, superabsorption, is harder to demonstrate because of the challenges of ... ...

    Abstract The rate at which matter emits or absorbs light can be modified by its environment, as markedly exemplified by the widely studied phenomenon of superradiance. The reverse process, superabsorption, is harder to demonstrate because of the challenges of probing ultrafast processes and has only been seen for small numbers of atoms. Its central idea—superextensive scaling of absorption, meaning larger systems absorb faster—is also the key idea underpinning quantum batteries. Here, we implement experimentally a paradigmatic model of a quantum battery, constructed of a microcavity enclosing a molecular dye. Ultrafast optical spectroscopy allows us to observe charging dynamics at femtosecond resolution to demonstrate superextensive charging rates and storage capacity, in agreement with our theoretical modeling. We find that decoherence plays an important role in stabilizing energy storage. Our work opens future opportunities for harnessing collective effects in light-matter coupling for nanoscale energy capture, storage, and transport technologies.
    Language English
    Publishing date 2022-01-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.abk3160
    Database MEDical Literature Analysis and Retrieval System OnLINE

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