Publications
509 results found
Healing G, Nadinov I, Hadmojo WT, et al., 2024, Ultrafast Coherent Hole Injection at the Interface between CuSCN and Polymer PM6 Using Femtosecond Mid-Infrared Spectroscopy., ACS Appl Mater Interfaces
Tracking the dynamics of ultrafast hole injection into copper thiocyanate (CuSCN) at the interface can be experimentally challenging. These challenges include restrictions in accessing the ultraviolet spectral range through transient electronic spectroscopy, where the absorption spectrum of CuSCN is located. Time-resolved vibrational spectroscopy solves this problem by tracking marker modes at specific frequencies and allowing direct access to dynamical information at the molecular level at donor-acceptor interfaces in real time. This study uses photoabsorber PM6 (poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo[1,2-b:4,5-b']dithiophene))-alt-(5,5-(1',3'-di-2-thienyl-5',7'-bis(2-ethylhexyl)-benzo[1',2'-c:4',5'-c']dithiophene-4,8-dione))]) as a model system to explore and decipher the hole transfer dynamics of CuSCN using femtosecond (fs) mid-infrared (IR) spectroscopy. The time-resolved results indicate that excited PM6 exhibits a sharp vibrational mode at 1599 cm-1 attributed to the carbonyl group, matching the predicted frequency position obtained from time-dependent density functional theory (DFT) calculations. The fs mid-IR spectroscopy demonstrates a fast formation (<168 fs) and blue spectral shift of the CN stretching vibration from 2118 cm-1 for CuSCN alone to 2180 cm-1 for PM6/CuSCN, confirming the hole transfer from PM6 to CuSCN. The short interfacial distance and high frontier orbital delocalization obtained from the interfacial DFT models support a coherent and ultrafast regime for hole transfer. These results provide direct evidence for hole injection at the interface of CuSCN for the first time using femtosecond mid-IR spectroscopy and serve as a new investigative approach for interfacial chemistry and solar cell communities.
McCulloch I, Stingelin N, Anthopoulos TD, 2024, In Recognition of the Instrumental Contribution of Donal Bradley to the Field of Condensed Matter and Applied Physics., Adv Mater
Sharma A, Faber H, AlGhamdi WS, et al., 2024, Label-free metal-oxide transistor biosensors for metabolite detection in human saliva, Advanced Science, ISSN: 2198-3844
Metabolites are essential molecules involved in various metabolic processes, and their deficiencies and excessive concentrations can trigger significant physiological consequences. The detection of multiple metabolites within a non-invasively collected biofluid could facilitate early prognosis and diagnosis of severe diseases. Here, a metal oxide heterojunction transistor (HJ-TFT) sensor is developed for the label-free, rapid detection of uric acid (UA) and 25(OH)Vitamin-D3 (Vit-D3) in human saliva. The HJ-TFTs utilize a solution-processed In2 O3 /ZnO channel functionalized with uricase enzyme and Vit-D3 antibody for the selective detection of UA and Vit-D3, respectively. The ultra-thin tri-channel architecture facilitates strong coupling between the electrons transported along the buried In2 O3 /ZnO heterointerface and the electrostatic perturbations caused by the interactions between the surface-immobilized bioreceptors and target analytes. The biosensors can detect a wide range of concentrations of UA (from 500 nm to 1000 µM) and Vit-D3 (from 100 pM to 120 nm) in human saliva within 60 s. Moreover, the biosensors exhibit good linearity with the physiological concentration of metabolites and limit of detections of ≈152 nm for UA and ≈7 pM for Vit-D3 in real saliva. The specificity is demonstrated against various interfering species, including other metabolites and proteins found in saliva, further showcasing its capabilities.
Stingelin N, Anthopoulos T, Kim H, et al., 2024, In memory of Professor Gilles Horowitz, Journal of Materials Chemistry C, ISSN: 2050-7526
<jats:p>Guest Editors Natalie Stingelin, Thomas Anthopoulos, Hyeok Kim, Denis Tondelier, Luisa Torsi and Christine Vidot-Ackermann introduce this <jats:italic>Journal of Materials Chemistry C</jats:italic> collection in memory of Professor Gilles Horowitz.</jats:p>
Qiao Z, He Q, Scaccabarozzi AD, et al., 2024, A novel selenophene based non-fullerene acceptor for near-infrared organic photodetectors with ultra-low dark current, Journal of Materials Chemistry C, ISSN: 2050-7526
<jats:p>Organic photodetectors have great potential in near-infrared applications. Here we develop new non-fullerene acceptors with detection above 800 nm and demonstrated large area devices with record performances.</jats:p>
Vasilopoulou M, Mohd Yusoff ARB, Chai Y, et al., 2023, Neuromorphic computing based on halide perovskites, Nature Electronics, Vol: 6, Pages: 949-962
Neuromorphic computing requires electronic systems that can perform massively parallel computational tasks with low energy consumption. Such systems have traditionally been based on complementary metal–oxide–semiconductor circuits, but further advances in computational performance will probably require devices that can offer high-order complexity combined with area and energy efficiency. Halide perovskites can handle both ions and electronic charges, and could be used to create adaptive computing systems based on intrinsic device dynamics. The materials also offer exotic switching phenomena, providing opportunities for multimodal systems. Here we explore the development of neuromorphic hardware systems based on halide perovskites. We examine how devices based on these materials can serve as synapses and neurons, and can be used in neuromorphic computing networks. We also consider the challenges involved in developing practical perovskite neuromorphic systems, and highlight how these systems could augment and complement digital circuits.
Panagiotopoulos A, Maksudov T, Kakavelakis G, et al., 2023, A critical perspective for emerging ultra-thin solar cells with ultra-high power-per-weight outputs, Applied Physics Reviews, Vol: 10
Ultrathin, solution-processed emerging solar cells with high power-per-weight (PPW) outputs demonstrate unique potential for applications where low weight, high power output, and flexibility are indispensable. The following perspective explores the literature of emerging PVs and highlights the maximum reported PPW values of perovskite solar cells (PSCs) 29.4 W/g, organic solar cells (OSCs) 32.07 W/g, and quantum dot solar cells 15.02 W/g, respectively. The record PPW values of OSCs and PSCs are approximately one order of magnitude higher compared to their inorganic ultrathin solar cells counterparts (approximately 3.2 W/g for CIGS and a-Si). This consists emerging PVs, very attractive for a variety of applications where the PPW is the key parameter. In particular, both OSCs and PSCs can be implemented in different scenarios of applications (indoor and biocompatible applications for OSCs and outdoor and high-energy radiation conversion conditions for the PSCs) due to their unique optoelectronic and physiochemical properties. Finally, our theoretical optical and electrical simulation and optimization study for the most promising and well-suited PV technologies showed an impressive maximum realistic theoretical PPW limit of 74.3 and 93.7 W/g for PSCs and OSCs, respectively. Our finding in the theoretical section shows that the experimental results achieved in the literature of PSCs and OSCs toward high PPW outputs is not quite close to the theoretical maximum (35% and 40% of the theoretical maximum for OSCs and PSCs, respectively), and thus, more work needs to be done to further increase the experimental PPW output of these promising PV technologies.
Sharma A, Faber H, Khosla A, et al., 2023, 3D printed electrochemical devices for bio-chemical sensing: A review, Materials Science and Engineering R: Reports, Vol: 156, ISSN: 0927-796X
Portable, affordable, and miniaturized electrochemical sensors for point-of-care diagnostic devices represent a step towards achieving the United Nations’ Sustainable Development Goal 3: Good Health and Well-Being. Over the last 10 years, rapid advancements in three-dimensional (3D) printing technology (additive manufacturing) have enabled the production of low-cost, miniature 3D printed (3DP) devices for bio-chemical sensing, enabling innovation in healthcare diagnostics for everyone regardless of their economic background or geographical location. Compared to traditional manufacturing processes, 3D printing offers numerous advantages for miniaturized electrochemical point-of-care diagnostic devices, such as rapid prototyping, custom-shaped devices, flexible fabrication designs, low energy consumption, reduced time to market, and reduced waste generation. This article reviews recent developments in 3DP electrochemical sensors, including the printing of composite materials, advanced electrode architectures, activation and functionalization methods, and electrochemical sensing performance (i.e. sensitivity, linear range, limits of detection) towards various analytes, including heavy metals/water pollutants, toxic/explosive substances, neurotransmitters/stimulants, metabolites, DNA, amino acids, proteins, viruses, and food pathogens. Moreover, we discuss the remaining challenges and gaps in current knowledge and solutions to improve the electroanalytic performance of 3DP electrodes for future biomedical applications in wearable and smart-implantable sensor systems of the future.
Rogdakis K, Chatzimanolis K, Psaltakis G, et al., 2023, Mixed-Halide Perovskite Memristors with Gate-Tunable Functions Operating at Low-Switching Electric Fields, ADVANCED ELECTRONIC MATERIALS, ISSN: 2199-160X
Sharma A, AlGhamdi WS, Faber H, et al., 2023, Non-invasive, ultrasensitive detection of glucose in saliva using metal oxide transistors, BIOSENSORS & BIOELECTRONICS, Vol: 237, ISSN: 0956-5663
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- Citations: 1
Ling Z, Nugraha MI, Hadmojo WT, et al., 2023, Over 19% Efficiency in Ternary Organic Solar Cells Enabled by n-Type Dopants, ACS ENERGY LETTERS, Vol: 8, Pages: 4104-4112, ISSN: 2380-8195
Albaridy R, Periyanagounder D, Naphade D, et al., 2023, Strain-Induced Sulfur Vacancies in Monolayer MoS<inf>2</inf>, ACS Materials Letters, Vol: 5, Pages: 2584-2593
The tuning of two-dimensional (2D) materials offers significant potential to overcome nanoelectronic limitations. As strain engineering is a nondestructive approach, we examine in this study the influence of biaxial strain on the chalcogen vacancy formation energy in transition metal dichalcogenides, employing a combination of calculations and experiments, specifically density functional theory, spherical-corrected scanning transmission electron microscopy, X-ray photoelectron spectroscopy, Raman and photoluminescence spectroscopy, Kelvin probe force microscopy, and I-V characterization. We demonstrate that compressive/tensile biaxial strain decreases/increases the chalcogen vacancy formation energy, increasing/decreasing the probability of creating chalcogen vacancies during the growth. Thus, differently strained areas within a sample can have different chalcogen vacancy densities, opening up a way to customize the work function and a route for defect engineering.
Gedda M, Gkeka D, Nugraha MI, et al., 2023, High-Efficiency Perovskite-Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers, ADVANCED ENERGY MATERIALS, Vol: 13, ISSN: 1614-6832
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- Citations: 4
He Q, Shaw J, Firdaus Y, et al., 2023, p-type conjugated polymers containing electron-deficient pentacyclic azepinedione, Macromolecules, Vol: 56, Pages: 5825-5834, ISSN: 0024-9297
Bisthienoazepinedione (BTA) has been reported for constructing high-performing p-type conjugated polymers in organic electronics, but the ring extended version of BTA is not well explored. In this work, we report a new synthesis of a key building block to the ring expanded electron-deficient pentacyclic azepinedione (BTTA). Three copolymers of BTAA with benzodithiophene substituted by different side chains are prepared. These polymers exhibit similar energy levels and optical absorption in solution and solid state, while significant differences are revealed in their film morphologies and behavior in transistor and photovoltaic devices. The best-performing polymers in transistor devices contained alkylthienyl side chains on the BDT unit (pBDT-BTTA-2 and pBDT-BTTA-3) and demonstrated maximum saturation hole mobilities of 0.027 and 0.017 cm2 V–1 s–1. Blends of these polymers with PC71BM exhibited a best photovoltaic efficiency of 6.78% for pBDT-BTTA-3-based devices. Changing to a low band gap non-fullerene acceptor (BTP-eC9) resulted in improved efficiency of up to 13.5%. Our results are among the best device performances for BTA and BTTA-based p-type polymers and highlight the versatile applications of this electron-deficient BTTA unit.
Sahoo S, Kothavade PA, Naphade DR, et al., 2023, 3D-printed polymer composite devices based on a ferroelectric chiral ammonium salt for high-performance piezoelectric energy harvesting, MATERIALS HORIZONS, Vol: 10, Pages: 3153-3161, ISSN: 2051-6347
Nugraha MI, Indriyati I, Primadona I, et al., 2023, Recent Progress in Colloidal Quantum Dot Thermoelectrics, ADVANCED MATERIALS, ISSN: 0935-9648
Deswal S, Panday R, Naphade DR, et al., 2023, Design and Piezoelectric Energy Harvesting Properties of a Ferroelectric Cyclophosphazene Salt, SMALL, ISSN: 1613-6810
Wu J, Ling Z, Franco LRR, et al., 2023, On the Conformation of Dimeric Acceptors and Their Polymer Solar Cells with Efficiency over 18 %, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, ISSN: 1433-7851
Negahdary M, Sharma A, Anthopoulos TD, et al., 2023, Recent advances in electrochemical nanobiosensors for cardiac biomarkers, TRAC-TRENDS IN ANALYTICAL CHEMISTRY, Vol: 164, ISSN: 0165-9936
Aljarb A, Min J, Hakami M, et al., 2023, Interfacial Reconstructed Layer Controls the Orientation of Monolayer Transition-Metal Dichalcogenides, ACS NANO, Vol: 17, Pages: 10010-10018, ISSN: 1936-0851
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- Citations: 1
Duijnstee EA, Gallant BM, Holzhey P, et al., 2023, Understanding the Degradation of Methylenediammonium and Its Role in Phase-Stabilizing Formamidinium Lead Triiodide, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 145, Pages: 10275-10284, ISSN: 0002-7863
Lin Y, Zhang Y, Magomedov A, et al., 2023, 18.73% efficient and stable inverted organic photovoltaics featuring a hybrid hole-extraction layer, MATERIALS HORIZONS, Vol: 10, Pages: 1292-1300, ISSN: 2051-6347
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- Citations: 2
Panca A, Panidi J, Faber H, et al., 2023, Flexible Oxide Thin Film Transistors, Memristors, and Their Integration, ADVANCED FUNCTIONAL MATERIALS, ISSN: 1616-301X
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- Citations: 2
Chen H, Jeong SY, Tian J, et al., 2023, A 19% efficient and stable organic photovoltaic device enabled by a guest nonfullerene acceptor with fibril-like morphology, ENERGY & ENVIRONMENTAL SCIENCE, Vol: 16, Pages: 1062-1070, ISSN: 1754-5692
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- Citations: 26
Prajesh N, Naphade DR, Yadav A, et al., 2023, Visualization of domain structure and piezoelectric energy harvesting in a ferroelectric metal-ligand cage, CHEMICAL COMMUNICATIONS, Vol: 59, Pages: 2919-2922, ISSN: 1359-7345
Anies F, Nugraha MI, Fall A, et al., 2023, In Situ Generation of n-Type Dopants by Thermal Decarboxylation, ADVANCED FUNCTIONAL MATERIALS, Vol: 33, ISSN: 1616-301X
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- Citations: 3
He Q, Basu A, Cha H, et al., 2023, Ultra-Narrowband Near-Infrared Responsive J-Aggregates of Fused Quinoidal Tetracyanoindacenodithiophene, ADVANCED MATERIALS, Vol: 35, ISSN: 0935-9648
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- Citations: 1
Rahmawati I, Indriyati, Permatasari FA, et al., 2023, Modulating Photothermal Properties of Carbon Dots through Nitrogen Incorporation Enables Efficient Solar Water Evaporation, ACS APPLIED NANO MATERIALS
Portilla L, Loganathan K, Faber H, et al., 2023, Wirelessly powered large-area electronics for the Internet of Things (vol 6, pg.no: 10, 2023), NATURE ELECTRONICS, ISSN: 2520-1131
Mandal S, Hou Y, Wang M, et al., 2023, Surface Modification of Hetero-phase Nanoparticles for Low-Cost Solution-Processable High-k Dielectric Polymer Nanocomposites, ACS APPLIED MATERIALS & INTERFACES, ISSN: 1944-8244
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- Citations: 2
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