389 results found
Isakov I, Faber H, Mottram AD, et al., 2020, Quantum Confinement and Thickness-Dependent Electron Transport in Solution-Processed In(2)O(3)Transistors, ADVANCED ELECTRONIC MATERIALS, ISSN: 2199-160X
Li W, Yarali E, Bakytbekov A, et al., 2020, Highly transparent and conductive electrodes enabled by scalable printing-and-sintering of silver nanowires, NANOTECHNOLOGY, Vol: 31, ISSN: 0957-4484
Portilla L, Zhao J, Wang Y, et al., 2020, Ambipolar Deep-Subthreshold Printed-Carbon-Nanotube Transistors for Ultralow-Voltage and Ultralow-Power Electronics., ACS Nano
The development of ultralow-power and easy-to-fabricate electronics with potential for large-scale circuit integration (i.e., complementary or complementary-like) is an outstanding challenge for emerging off-the-grid applications, e.g., remote sensing, "place-and-forget", and the Internet of Things. Herein we address this challenge through the development of ambipolar transistors relying on solution-processed polymer-sorted semiconducting carbon nanotube networks (sc-SWCNTNs) operating in the deep-subthreshold regime. Application of self-assembled monolayers at the active channel interface enables the fine-tuning of sc-SWCNTN transistors toward well-balanced ambipolar deep-subthreshold characteristics. The significance of these features is assessed by exploring the applicability of such transistors to complementary-like integrated circuits, with respect to which the impact of the subthreshold slope and flatband voltage on voltage and power requirements is studied experimentally and theoretically. As demonstrated with inverter and NAND gates, the ambipolar deep-subthreshold sc-SWCNTN approach enables digital circuits with complementary-like operation and characteristics including wide noise margins and ultralow operational voltages (≤0.5 V), while exhibiting record-low power consumption (≤1 pW/μm). Among thin-film transistor technologies with minimal material complexity, our approach achieves the lowest energy and power dissipation figures reported to date, which are compatible with and highly attractive for emerging off-the-grid applications.
Xue F, He X, Liu W, et al., 2020, Optoelectronic Ferroelectric Domain-Wall Memories Made from a Single Van Der Waals Ferroelectric, ADVANCED FUNCTIONAL MATERIALS, ISSN: 1616-301X
Scaccabarozzi AD, Scuratti F, Barker AJ, et al., 2020, Understanding charge transport in high-mobilityp-doped multicomponent blend organic transistors, Advanced Electronic Materials, Pages: 1-9, ISSN: 2199-160X
The use of ternary systems comprising polymers, small molecules, and molecular dopants represents a promising approach for the development of high‐mobility, solution‐processed organic transistors. However, the current understanding of the charge transport in these complex systems, and particularly the role of molecular doping, is rather limited. Here, the role of the individual components in enhancing hole transport in the best‐performing ternary blend systems comprising the small molecule 2,7‐dioctylbenzothieno[3,2‐b]benzothiophene (C8‐BTBT), the conjugated polymer indacenodithiophene‐alt‐benzothiadiazole (C16IDT‐BT), and the molecular p‐type dopant (C60F48) is investigated. Temperature‐dependent charge transport measurements reveal different charge transport regimes depending on the blend composition, crossing from a thermally activated to a band‐like behavior. Using the charge‐modulation spectroscopy technique, it is shown that in the case of the pristine blend, holes relax onto the conjugated polymer phase where shallow traps dominate carrier transport. Addition of a small amount of C60F48 deactivates those shallow traps allowing for a higher degree of hole delocalization within the highly crystalline C8‐BTBT domains located on the upper surface of the blend film. Such synergistic effect of a highly ordered C8‐BTBT phase, a polymer bridging grain boundaries, and p‐doping results in the exceptionally high hole mobilities and band‐like transport observed in this blend system.
Lin Y, Firdaus Y, Isikgor FH, et al., 2020, Self-Assembled Monolayer Enables Hole Transport Layer-Free Organic Solar Cells with 18% Efficiency and Improved Operational Stability, ACS ENERGY LETTERS, Vol: 5, Pages: 2935-2944, ISSN: 2380-8195
Aljarb A, Fu J-H, Hsu C-C, et al., 2020, Ledge-directed epitaxy of continuously self-aligned single-crystalline nanoribbons of transition metal dichalcogenides, NATURE MATERIALS, ISSN: 1476-1122
Seitkhan A, Neophytou M, Hallani RK, et al., 2020, A Multilayered Electron Extracting System for Efficient Perovskite Solar Cells, ADVANCED FUNCTIONAL MATERIALS, ISSN: 1616-301X
Chang X, Fang J, Fan Y, et al., 2020, Printable CsPbI(3)Perovskite Solar Cells with PCE of 19% via an Additive Strategy, ADVANCED MATERIALS, ISSN: 0935-9648
Mohan L, Ratnasingham SR, Panidi J, et al., 2020, Low Temperature Scalable Deposition of Copper(I) Thiocyanate Films via Aerosol-Assisted Chemical Vapor Deposition, Crystal Growth & Design, Vol: 20, Pages: 5380-5386, ISSN: 1528-7483
Copper(I) thiocyanate (CuSCN) is a stable, wide bandgap (>3.5 eV), low-cost p-type semiconductor widely used in a variety of optoelectronic applications, including thin film transistors, organic light-emitting diodes, and photovoltaic cells. For CuSCN to have impact in the commercial fabrication of such devices, large-area, low-cost deposition techniques are required. Here, we report a novel technique for deposition of CuSCN that addresses these challenges. Aerosol-assisted chemical vapor deposition (AACVD) is used to deposit highly crystalline CuSCN films at low temperature. AACVD is a commercially viable technique due to its low cost and inherent scalability. In this study, the deposition temperature, CuSCN concentration and carrier gas flow rate were studied and optimized, resulting in homogeneous films grown over areas approaching 30 cm2. At the optimized values, i.e., 60 °C using a 35 mg/mL solution and a carrier gas flow rate of 0.5 dm3/min, the film growth rate is around 100 nm/min. We present a thorough analysis of the film growth parameters and the subsequent morphology, composition, and structural and optical properties of the deposited thin films.
Zhang S, Tang M-C, Fan Y, et al., 2020, Role of Alkali-Metal Cations in Electronic Structure and Halide Segregation of Hybrid Perovskites, ACS APPLIED MATERIALS & INTERFACES, Vol: 12, Pages: 34402-34412, ISSN: 1944-8244
Anies F, Wang S, Hodsden T, et al., 2020, A Structurally Simple but High-Performing Donor-Acceptor Polymer for Field-Effect Transistor Applications, ADVANCED ELECTRONIC MATERIALS, Vol: 6, ISSN: 2199-160X
Nugraha M, Yarali E, Firdaus Y, et al., 2020, Rapid Photonic Processing of High-Electron-Mobility PbS Colloidal Quantum Dot Transistors, ACS APPLIED MATERIALS & INTERFACES, Vol: 12, Pages: 31591-31600, ISSN: 1944-8244
Cheng F, Verrelli E, Alharthi FA, et al., 2020, Solution-processable and photopolymerisable TiO(2)nanorods as dielectric layers for thin film transistors, RSC ADVANCES, Vol: 10, Pages: 25540-25546
Tang M-C, Fan Y, Barrit D, et al., 2020, Efficient Hybrid Mixed-Ion Perovskite Photovoltaics: In Situ Diagnostics of the Roles of Cesium and Potassium Alkali Cation Addition, SOLAR RRL, Vol: 4, ISSN: 2367-198X
Yang X, Lin Y, Liu J, et al., 2020, A Highly Conductive Titanium Oxynitride Electron-Selective Contact for Efficient Photovoltaic Devices, ADVANCED MATERIALS, Vol: 32, ISSN: 0935-9648
Kirmani AR, Eisner F, Mansour AE, et al., 2020, Colloidal Quantum Dot Photovoltaics Using Ultrathin, Solution-Processed Bilayer In2O3/ZnO Electron Transport Layers with Improved Stability, ACS APPLIED ENERGY MATERIALS, Vol: 3, Pages: 5135-5141, ISSN: 2574-0962
Paterson AF, Savva A, Wustoni S, et al., 2020, Water stable molecular n-doping produces organic electrochemical transistors with high transconductance and record stability, NATURE COMMUNICATIONS, Vol: 11, ISSN: 2041-1723
Lin Y-H, Huang W, Pattanasattayavong P, et al., 2020, Deciphering photocarrier dynamics for tuneable high-performance perovskite-organic semiconductor heterojunction phototransistors (vol 10, 4475, 2019), NATURE COMMUNICATIONS, Vol: 11, ISSN: 2041-1723
Dauzon E, Lin Y, Faber H, et al., 2020, Stretchable and Transparent Conductive PEDOT:PSS-Based Electrodes for Organic Photovoltaics and Strain Sensors Applications, ADVANCED FUNCTIONAL MATERIALS, Vol: 30, ISSN: 1616-301X
Khan JI, Firdaus Y, Cruciani F, et al., 2020, Thienyl Sidechain Substitution and Backbone Fluorination of Benzodithiophene-Based Donor Polymers Concertedly Minimize Carrier Losses in ITIC-Based Organic Solar Cells, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 124, Pages: 10420-10429, ISSN: 1932-7447
Ho CHY, Kim T, Xiong Y, et al., 2020, High-Performance Tandem Organic Solar Cells Using HSolar as the Interconnecting Layer, ADVANCED ENERGY MATERIALS, Vol: 10, ISSN: 1614-6832
Yarali E, Faber H, Yengel E, et al., 2020, Low-Voltage Heterojunction Metal Oxide Transistors via Rapid Photonic Processing, ADVANCED ELECTRONIC MATERIALS, Vol: 6, ISSN: 2199-160X
Anthopoulos TD, Noh Y-Y, Jurchescu OD, 2020, Emerging Thin-Film Transistor Technologies and Applications, ADVANCED FUNCTIONAL MATERIALS, Vol: 30, ISSN: 1616-301X
Ma C, Clark S, Liu Z, et al., 2020, Solution-Processed Mixed-Dimensional Hybrid Perovskite/Carbon Nanotube Electronics, ACS NANO, Vol: 14, Pages: 3969-3979, ISSN: 1936-0851
Hodsden T, Thorley KJ, Panidi J, et al., 2020, Core fluorination enhances solubility and ambient stability of an IDT‐based n‐type semiconductor in transistor devices, Advanced Functional Materials, Vol: 30, Pages: 1-12, ISSN: 1616-301X
The synthesis of a novel fluorinated n‐type small molecule based on an indacenodithiophene core is reported. Fluorination is found to have a significant impact on the physical properties, including a surprisingly dramatic improvement in solubility, in addition to effectively stabilizing the lowest‐unoccupied molecular orbital energy (−4.24 eV). Single‐crystal analysis and density functional theory calculations indicate the improved solubility can be attributed to backbone torsion resulting from the positioning of the fluorine group in close proximity to the strongly electron‐withdrawing dicyanomethylene group. Organic thin‐film transistors made via blade coating display high electron mobility (up to 0.49 cm2 V−1 s−1) along with good retention of performance in ambient conditions.
Adilbekova B, Lin Y, Yengel E, et al., 2020, Liquid phase exfoliation of MoS2 and WS2 in aqueous ammonia and their application in highly efficient organic solar cells, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 8, Pages: 5259-5264, ISSN: 2050-7526
Zhou L, Cao Z, Wahyudi W, et al., 2020, Electrolyte Engineering Enables High Stability and Capacity Alloying Anodes for Sodium and Potassium Ion Batteries, ACS ENERGY LETTERS, Vol: 5, Pages: 766-776, ISSN: 2380-8195
Zheng X, Yuan S, Liu J, et al., 2020, Chlorine Vacancy Passivation in Mixed Halide Perovskite Quantum Dots by Organic Pseudohalides Enables Efficient Rec. 2020 Blue Light-Emitting Diodes, ACS ENERGY LETTERS, Vol: 5, Pages: 793-798, ISSN: 2380-8195
He Q, Shahid M, Jiao X, et al., 2020, The crucial role of fluorine in fully alkylated ladder type carbazole based non-fullerene organic solar cells, ACS Applied Materials and Interfaces, Vol: 12, Pages: 9555-9562, ISSN: 1944-8244
Two fused ladder type non-fullerene acceptors, DTCCIC and DTCCIC-4F, based on an electron-donating alkylated dithienocyclopentacarbazole core flanked by electron-withdrawing non-fluorinated or fluorinated 1,1-dicyanomethylene-3-indanone (IC or IC-4F), are prepared and utilized in organic solar cells (OSCs). The two new molecules reveal planar structures and strong aggregation behavior, and fluorination is shown to red shift the optical band gap and down shift energy levels. OSCs based on DTCCIC-4F exhibit a power conversion efficiency of 12.6 %, much higher than that of DTCCIC based devices (6.2 %). Microstructural studies reveal that while both acceptors are highly crystalline, bulk heterojunction blends based on the non-fluorinated DTCCIC result in overly coarse domains, while blends based on the fluorinated DTCCIC-4F exhibit a more optimal nanoscale morphology. These results highlight the importance of end group fluorination in controlling molecular aggregation and miscibility.
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