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Dr. Roberto Sorrentino
Department of Neurosciences, Reproductive and Odontostomatological Sciences, University “Federico II” of Naples, via Pansini 5, 80131 Naples, Italy

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Paper
Published: 01 June 2021 in Dalton Transactions
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Colloidal semiconductor nanoplatelets (NPLs) are a subgroup of quantum confined materials that have recently emerged as promising active material for solution processed light-emitting diodes (LEDs) thanks to their peculiar structural and electronic properties as well as their reduced dimensionality. Nowadays the conventional structure for NPL-based LEDs makes use of the poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as hole transporting layer (HTL). This is a well-known conjugated conductive polymer because it leads to high LED’s efficiencies, though it has limited stability in air due to its intrinsic acidity and hygroscopicity. Here, we develop a nanocomposite aqueous ink, obtained by blending commercial PEDOT:PSS with water-based, stable and highly concentrated molybdenum disulfide (MoS2) nanosheets, obtained by Liquid Phase Exfoliation (LPE) suitable as HTL for solution processed NPLs-based LEDs. We demonstrate that the MoS2 additive effectively works as a performance booster in unpackaged devices therein prolonging the lifetime up to 1000 hours upon exposure in ambient conditions. Moreover, the addition of MoS2 induces a modification of the anode interface properties, including a change in the work function and a significant enhancement of the permittivity of the HTL.

ACS Style

Roberto Sorrentino; Robyn Worsely; Paola Lagonegro; Christian Martella; Adriana Alieva; Guido Scavia; Francesco Galeotti; Mariacecilia Pasini; Benoit Dubertret; Sergio Brovelli; Alessandro Molle; Cinzia Casiraghi; Umberto Giovanella. Hybrid MoS2/PEDOT:PSS transporting layer for Interface Engineering of Nanoplatelets based Light-Emitting Diodes. Dalton Transactions 2021, 1 .

AMA Style

Roberto Sorrentino, Robyn Worsely, Paola Lagonegro, Christian Martella, Adriana Alieva, Guido Scavia, Francesco Galeotti, Mariacecilia Pasini, Benoit Dubertret, Sergio Brovelli, Alessandro Molle, Cinzia Casiraghi, Umberto Giovanella. Hybrid MoS2/PEDOT:PSS transporting layer for Interface Engineering of Nanoplatelets based Light-Emitting Diodes. Dalton Transactions. 2021; ():1.

Chicago/Turabian Style

Roberto Sorrentino; Robyn Worsely; Paola Lagonegro; Christian Martella; Adriana Alieva; Guido Scavia; Francesco Galeotti; Mariacecilia Pasini; Benoit Dubertret; Sergio Brovelli; Alessandro Molle; Cinzia Casiraghi; Umberto Giovanella. 2021. "Hybrid MoS2/PEDOT:PSS transporting layer for Interface Engineering of Nanoplatelets based Light-Emitting Diodes." Dalton Transactions , no. : 1.

Journal article
Published: 02 February 2021 in Molecules
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Conjugated polymers with ionic pendant groups (CPEs) are receiving increasing attention as solution-processed interfacial materials for organic solar cells (OSCs). Various anionic CPEs have been successfully used, on top of ITO (Indium Tin Oxide) electrodes, as solution-processed anode interlayers (AILs) for conventional devices with direct geometry. However, the development of CPE AILs for OSC devices with inverted geometry is an important topic that still needs to be addressed. Here, we have designed three anionic CPEs bearing alkyl-potassium-sulfonate side chains. Their functional behavior as anode interlayers has been investigated in P3HT:PC61BM (poly(3-hexylthiophene): [6,6]-phenyl C61 butyric acid methyl ester) devices with an inverted geometry, using a hole collecting silver electrode evaporated on top. Our results reveal that to obtain effective anode modification, the CPEs’ conjugated backbone has to be tailored to grant self-doping and to have a good energy-level match with the photoactive layer. Furthermore, the sulfonate moieties not only ensure the solubility in polar orthogonal solvents, induce self-doping via a right choice of the conjugated backbone, but also play a role in the gaining of hole selectivity of the top silver electrode.

ACS Style

Elisa Lassi; Benedetta Squeo; Roberto Sorrentino; Guido Scavia; Simona Mrakic-Sposta; Maristella Gussoni; Barbara Vercelli; Francesco Galeotti; Mariacecilia Pasini; Silvia Luzzati. Sulfonate-Conjugated Polyelectrolytes as Anode Interfacial Layers in Inverted Organic Solar Cells. Molecules 2021, 26, 763 .

AMA Style

Elisa Lassi, Benedetta Squeo, Roberto Sorrentino, Guido Scavia, Simona Mrakic-Sposta, Maristella Gussoni, Barbara Vercelli, Francesco Galeotti, Mariacecilia Pasini, Silvia Luzzati. Sulfonate-Conjugated Polyelectrolytes as Anode Interfacial Layers in Inverted Organic Solar Cells. Molecules. 2021; 26 (3):763.

Chicago/Turabian Style

Elisa Lassi; Benedetta Squeo; Roberto Sorrentino; Guido Scavia; Simona Mrakic-Sposta; Maristella Gussoni; Barbara Vercelli; Francesco Galeotti; Mariacecilia Pasini; Silvia Luzzati. 2021. "Sulfonate-Conjugated Polyelectrolytes as Anode Interfacial Layers in Inverted Organic Solar Cells." Molecules 26, no. 3: 763.

Journal article
Published: 15 January 2021 in Energies
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Polymer solar cells (PSCs) based on non-fullerene acceptors have the advantages of synthetic versatility, strong absorption ability, and high thermal stability. These characteristics result in impressive power conversion efficiency values, but to further push both the performance and the stability of PSCs, the insertion of appropriate interlayers in the device structure remains mandatory. Herein, a naphthalene diimide-based cathode interlayer (NDI-OH) is synthesized with a facile three-step reaction and used as a cathode interlayer for fullerene and non-fullerene PSCs. This cationic polyelectrolyte exhibited good solubility in alcohol solvents, transparency in the visible range, self-doping behavior, and good film forming ability. All these characteristics allowed the increase in the devices’ power conversion efficiencies (PCE) both for fullerene and non-fullerene-based PSCs. The successful results make NDI-OH a promising cathode interlayer to apply in PSCs.

ACS Style

Roberto Sorrentino; Marta Penconi; Anita Andicsová-Eckstein; Guido Scavia; Helena Švajdlenková; Erika Kozma; Silvia Luzzati. An N-type Naphthalene Diimide Ionene Polymer as Cathode Interlayer for Organic Solar Cells. Energies 2021, 14, 454 .

AMA Style

Roberto Sorrentino, Marta Penconi, Anita Andicsová-Eckstein, Guido Scavia, Helena Švajdlenková, Erika Kozma, Silvia Luzzati. An N-type Naphthalene Diimide Ionene Polymer as Cathode Interlayer for Organic Solar Cells. Energies. 2021; 14 (2):454.

Chicago/Turabian Style

Roberto Sorrentino; Marta Penconi; Anita Andicsová-Eckstein; Guido Scavia; Helena Švajdlenková; Erika Kozma; Silvia Luzzati. 2021. "An N-type Naphthalene Diimide Ionene Polymer as Cathode Interlayer for Organic Solar Cells." Energies 14, no. 2: 454.