Publications
229 results found
Scaccabarozzi AD, Basham J, Yu L, et al., 2020, High-density polyethylene-an inert additive with stabilizing effects on organic field-effect transistors, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 8, Pages: 15406-15415, ISSN: 2050-7526
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- Citations: 13
Marina S, Kaufmann NP, Karki A, et al., 2020, The Importance of Quantifying the Composition of the Amorphous Intermixed Phase in Organic Solar Cells, ADVANCED MATERIALS, Vol: 32, ISSN: 0935-9648
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- Citations: 18
Jones RG, Ober CK, Hayakawa T, et al., 2020, Terminology of polymers in advanced lithography (IUPAC Recommendations 2020), PURE AND APPLIED CHEMISTRY, Vol: 92, Pages: 1861-1891, ISSN: 0033-4545
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- Citations: 1
Sommerville PJW, Li Y, Dong BX, et al., 2020, Elucidating the Influence of Side-Chain Circular Distribution on the Crack Onset Strain and Hole Mobility of Near-Amorphous Indacenodithiophene Copolymers, MACROMOLECULES, Vol: 53, Pages: 7511-7518, ISSN: 0024-9297
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- Citations: 18
Levitsky A, Matrone GM, Khirbat A, et al., 2020, Toward Fast Screening of Organic Solar Cell Blends, ADVANCED SCIENCE, Vol: 7
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- Citations: 14
Carroli M, Duong DT, Buchaca-Domingo E, et al., 2020, The Role of Morphology in Optically Switchable Transistors Based on a Photochromic Molecule/p-Type Polymer Semiconductor Blend, ADVANCED FUNCTIONAL MATERIALS, Vol: 30, ISSN: 1616-301X
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- Citations: 19
Keltie S, Skabara P, Stingelin N, 2019, New Editor-in-Chief for <i>Journal of Materials Chemistry C</i>, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 7, Pages: 12372-12372, ISSN: 2050-7526
Dyson MJ, Lariou E, Martin J, et al., 2019, Managing Local Order in Conjugated Polymer Blends via Polarity Contrast, CHEMISTRY OF MATERIALS, Vol: 31, Pages: 6540-6547, ISSN: 0897-4756
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- Citations: 18
Luzio A, Nuebling F, Martin J, et al., 2019, Microstructural control suppresses thermal activation of electron transport at room temperature in polymer transistors, NATURE COMMUNICATIONS, Vol: 10
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- Citations: 27
Ruscello M, Sarkar T, Levitsky A, et al., 2019, Nanocomposite of nickel oxide nanoparticles and polyethylene oxide as printable hole transport layer for organic solar cells, SUSTAINABLE ENERGY & FUELS, Vol: 3, Pages: 1418-1426, ISSN: 2398-4902
Bachevillier S, Yuan H-K, Strang A, et al., 2019, Fully solution-processed photonic structures from inorganic/organic molecular hybrid materials and commodity polymers, Advanced Functional Materials, ISSN: 1616-301X
Dyson M, Stingelin N, Martin J, et al., 2019, Managing Local Order in Conjugated Polymer Blends via Polarity Contrast, 1st Interfaces in Organic and Hybrid Thin-Film Optoelectronics, Publisher: Fundació Scito
Bachevillier S, Yuan H-K, Strang A, et al., 2019, Fully solution-processed photonic structures from inorganic/organic molecular hybrid materials and commodity polymers, Advanced Functional Materials, ISSN: 1616-301X
Managing the interference effects from thin (multi-)layers allows for the control of the optical transmittance/reflectance of widely used, technologically significant structures such as antireflection coatings (ARCs) and distributed Bragg reflectors (DBRs). These rely on the destructive/constructive interference between incident, reflected and transmitted radiation. While known for over a century and having been extremely well investigated, the emergence of printable, large-area electronics brings a new emphasis: the development of materials capable of transferring well-established ideas to a solution-based production. Here, we demonstrate the solution-fabrication of ARCs and DBRs utilizing alternating layers of commodity plastics and recently developed organic/inorganic hybrid materials comprised of poly(vinyl alcohol) (PVAl), cross-linked with titanium oxide hydrates. Dip-coated ARCs exhibit an 88% reduction in reflectance across the visible compared to uncoated glass, and fully solution-coated DBRs provide a reflection of >99% across a 100 nm-spectral band in the visible region. Detailed comparisons with transfer-matrix methods (TMM) highlight their excellent optical quality including extremely low optical losses. Beneficially, when exposed to elevated temperatures, the hybrid material can display a notable, reproducible and irreversible change in refractive index and film thickness while maintaining excellent optical performance allowing post-deposition tuning, e.g., for thermoresponsive applications, including security features and product-storage environment monitoring.
Krauspe P, Tsokkou D, Causa M, et al., 2018, Terahertz short-range mobilities in neat and intermixed regions of polymer: fullerene blends with controlled phase morphology, JOURNAL OF MATERIALS CHEMISTRY A, Vol: 6, Pages: 22301-22309, ISSN: 2050-7488
Martin J, Davidson E, Greco C, et al., 2018, Temperature dependence of persistence length affects top-down descriptions of aligning interactions in nematic conjugated polymers, 256th National Meeting and Exposition of the American-Chemical-Society (ACS) - Nanoscience, Nanotechnology and Beyond, Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Kirn JJ, Bachevillier S, Arellano DLG, et al., 2018, Correlating Crystal Thickness, Surface Morphology, and Charge Transport in Pristine and Doped Rubrene Single Crystals, ACS APPLIED MATERIALS & INTERFACES, Vol: 10, Pages: 26745-26751, ISSN: 1944-8244
Carroll D, Constantinou A, Stingelin N, et al., 2018, Scalable syntheses of well-defined pentadecablock bipolymer and quintopolymer, Polymer Chemistry, Vol: 9, Pages: 3450-3454, ISSN: 1759-9954
The one-pot syntheses of two pentadeca-(15)-block methacrylate-based amphiphilic copolymers, specifically a bipolymer (AB)7A and a quintopolymer (ABCDE)3, are being reported using a fast and easy to scale up procedure that does not require any intermediate purification steps. Both syntheses were carried out using sequential group transfer polymerisation (GTP) and took under 3.5 h. Amino-containing (DMAEMA, DEAEMA), ether (THFMA, MEGMA) and alkyl (EtMA) methacrylates were used to produce the multiblock copolymers with a final Đ < 1.3.
Treat N, Reid O, Fearn S, et al., 2018, Robust processing of small-molecule:fullerene organic solar cells via use of nucleating agents, ACS Applied Energy Materials, Vol: 1, Pages: 1973-1980, ISSN: 2574-0962
The power conversion efficiency (PCE) of small-molecule bulk heterojunction solar cells is highly sensitive to the “ink” formulation used to produce the photoactive layer. Here we demonstrate that the addition of nucleating agents renders device fabrication notably less susceptible to the ink composition, promising a route toward more robust processing of efficient devices over large areas and enabling more facile materials screening. We selected as a model system blends of 7,7-[4,4-bis(2-ethylhexyl)-4H-silolo[3,2-b:4,5-b]dithiophene-2,6-diyl]bis[6-fluoro-4-(5-hexyl-[2,2-bithiophen]-5-yl)benzo[c][1,2,5]thiadiazole](p-DTS(FBTTh2)2) as the donor and [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) as the acceptor because this is one of the small-molecule OPV blends with a device performance that is most sensitive to ink formulation, especially when used with the processing aid diiodooctane (DIO). Addition of DIO is essential to obtain high device performances; however, a notable increase in device performance is only achieved over a very narrow DIO content regime. Use of nucleating agents drastically changes this situation and leads to well-performing devices even at extreme levels of DIO. We thus start to address here one of the great challenges in organic solar cell research: the fact that, too often, only a very limited composition range leads to high efficiency devices. This means that for every new donor or acceptor a multitude of formulations have to be tested, including in combination with processing aids, to ensure that promising materials are not overlooked. The use of nucleating agents, thus, promises to render materials discovery more straightforward as this dependency of device performance with composition can be reduced.
Taroni PJ, Santagiuliana G, Wan K, et al., 2018, Toward Stretchable Self-Powered Sensors Based on the Thermoelectric Response of PEDOT:PSS/Polyurethane Blends, ADVANCED FUNCTIONAL MATERIALS, Vol: 28, ISSN: 1616-301X
Punzi A, Operamolla A, Omar OH, et al., 2018, Designing Small Molecules as Ternary Energy-Cascade Additives for Polymer:Fullerene Solar Cell Blends, CHEMISTRY OF MATERIALS, Vol: 30, Pages: 2213-2217, ISSN: 0897-4756
Reichenberger M, Kroh D, Matrone GMM, et al., 2018, Controlling aggregate formation in conjugated polymers by spin-coating below the critical temperature of the disorder-order transition, JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, Vol: 56, Pages: 532-542, ISSN: 0887-6266
Martin J, Stingelin N, Cangialosi D, 2018, Direct Calorimetric Observation of the Rigid Amorphous Fraction in a Semiconducting Polymer, JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Vol: 9, Pages: 990-995, ISSN: 1948-7185
Martin J, Davidson EC, Greco C, et al., 2018, Temperature-Dependence of Persistence Length Affects Phenomenological Descriptions of Aligning Interactions in Nematic Semiconducting Polymers, CHEMISTRY OF MATERIALS, Vol: 30, Pages: 748-761, ISSN: 0897-4756
Martin J, Dyson M, Reid OG, et al., 2018, On the Effect of Confinement on the Structure and Properties of Small-Molecular Organic Semiconductors, ADVANCED ELECTRONIC MATERIALS, Vol: 4, ISSN: 2199-160X
Dyson M, Kroon R, Sieval AB, et al., 2018, CHAPTER 6: Structure/Property/Processing Relationships for Organic Solar Cells, RSC Nanoscience and Nanotechnology, Pages: 182-225, ISBN: 9781788010801
Rapid developments in the field of organic solar cells have been driven by this technology's potentially advantageous traits: the environmentally friendly, low-cost generation of energy with the possibility of large area manufacturing of flexible, lightweight, semi-transparent devices, with predicted low energy payback times. Major step changes leading to vastly improved devices with ever-increasing performance have been achieved through new insights into materials design and an improved understanding of the often complex microstructure and phase morphology of organic solar cell systems. This chapter summarises the advances in synthesis, concentrating on the relevant structure/property relations and how the chemical structure affects processing and the microstructure. This is followed by a detailed discussion of classical materials science approaches that assist in gaining insights into complex materials systems, such as organic solar cell blends from the molecular to the micrometre scale, with a focus on polymer-based systems and how to apply this knowledge to future larger area processing of organic photovoltaic architectures.
Dixon AG, Visvanathan R, Clark NA, et al., 2018, Molecular weight dependence of carrier mobility and recombination rate in neat P3HT films, JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, Vol: 56, Pages: 31-35, ISSN: 0887-6266
Yang S-F, Liu Z-T, Cai Z-X, et al., 2017, Diketopyrrolopyrrole-Based Conjugated Polymer Entailing Triethylene Glycols as Side Chains with High Thin-Film Charge Mobility without Post-Treatments, ADVANCED SCIENCE, Vol: 4, ISSN: 2198-3844
Masi S, Rizzo A, Munir R, et al., 2017, Organic Gelators as Growth Control Agents for Stable and Reproducible Hybrid Perovskite-Based Solar Cells, ADVANCED ENERGY MATERIALS, Vol: 7, ISSN: 1614-6832
Molin C, Perantie J, Le Goupil F, et al., 2017, Comparison of direct electrocaloric characterization methods exemplified by 0.92 Pb(Mg1/3Nb2/3)O-3-0.08 PbTiO3 multilayer ceramics, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 100, Pages: 2885-2892, ISSN: 0002-7820
Martin Perez J, Le Borgne M, Quinn J, et al., 2017, New 3,3'-(ethane-1, 2-diylidene)bis(indolin-2-one) (EBI)-based small molecule semiconductors for organic solar cells, Journal of Materials Chemistry C, Vol: 5, Pages: 5143-5153, ISSN: 2050-7534
A series of new donor–acceptor–donor (D–A–D) small-molecule compounds, with 3,3′-(ethane-1,2-diylidene)bis(indolin-2-one) (EBI) as an electron acceptor building block coupled with various electron donor end-capping moieties (thiophene, bithiophene and benzofuran), were synthesized and characterized. When the fused-ring benzofuran is combined to EBI (EBI-BF), the molecules displayed a perfectly planar conformation and afforded the best charge transport properties among these EBI compounds with a hole mobility of up to 0.02 cm2 V−1 s−1. All EBI-based small molecules were used as donor material along with a PC61BM acceptor for the fabrication of solution-processed bulk-heterojunction (BHJ) solar cells. The best performing photovoltaic devices are based on the EBI derivative using the bithiophene end-capping moiety (EBI-2T) with a maximum power conversion efficiency (PCE) of 1.92%, owing to the broad absorption spectra of EBI-2T and the appropriate morphology of the BHJ. With the aim of establishing a correlation between the molecular structure and the thin film morphology, differential scanning calorimetry, atomic force microscopy and X-ray diffraction analysis were performed on neat and blend films of each material.
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