370 results found
Paterson AF, Savva A, Wustoni S, et al., 2020, Water stable molecular n-doping produces organic electrochemical transistors with high transconductance and record stability., Nat Commun, Vol: 11
From established to emergent technologies, doping plays a crucial role in all semiconducting devices. Doping could, theoretically, be an excellent technique for improving repressively low transconductances in n-type organic electrochemical transistors - critical for advancing logic circuits for bioelectronic and neuromorphic technologies. However, the technical challenge is extreme: n-doped polymers are unstable in electrochemical transistor operating environments, air and water (electrolyte). Here, the first demonstration of doping in electron transporting organic electrochemical transistors is reported. The ammonium salt tetra-n-butylammonium fluoride is simply admixed with the conjugated polymer poly(N,N'-bis(7-glycol)-naphthalene-1,4,5,8-bis(dicarboximide)-co-2,2'-bithiophene-co-N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide), and found to act as a simultaneous molecular dopant and morphology-additive. The combined effects enhance the n-type transconductance with improved channel capacitance and mobility. Furthermore, operational and shelf-life stability measurements showcase the first example of water-stable n-doping in a polymer. Overall, the results set a precedent for doping/additives to impact organic electrochemical transistors as powerfully as they have in other semiconducting devices.
Li W, Yarali E, Bakytbekov A, et al., 2020, Highly Transparent and Conductive Electrodes Enabled by Scalable Printing-and-Sintering of Silver Nanowires., Nanotechnology
Silver nanowires (Ag NWs) have promised well for flexible and transparent electronics. However, It remains an open question on how to achieve large-scale printing of Ag NWs with high optical transparency, electrical conductivity, and mechanical durability for practical applications, though extensive research for more than one decade. In this work, we propose a possible solution that integrates screen printing of Ag NWs with flash-light sintering (FLS). We demonstrate that the use of low-concentration, screen-printable Ag NW ink enables large-area and high-resolution patterning of Ag NWs. A critical advantage comes from the FLS process that allows low-temperature processing, short operational time, and high output rate - characteristics that fit the scalable manufacturing. Importantly, we show that the resultant Ag NW patterns feature low sheet resistance (1.1-9.2 Ohm/sq), high transparency (75.2-92.6%), and thus a remarkable figure of merit comparable to state of the art. These outstanding properties of Ag NW patterns, together with their scalable fabrication method we proposed, would facilitate many Ag NW-based applications, such as transparent heater, stretchable displays, and wearable devices; here, we demonstrate the novel design of flexible and transparent radio frequency 5G antennas.
Lin Y-H, Huang W, Pattanasattayavong P, et al., 2020, Publisher Correction: Deciphering photocarrier dynamics for tuneable high-performance perovskite-organic semiconductor heterojunction phototransistors., Nat Commun, Vol: 11
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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, 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, 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
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
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
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.
Lin Y, Firdaus Y, Nugraha MI, et al., 2020, 17.1% Efficient Single-Junction Organic Solar Cells Enabled by n-Type Doping of the Bulk-Heterojunction, ADVANCED SCIENCE, Vol: 7
Georgiadou DG, Lin Y, Lim J, et al., 2020, High Responsivity and Response Speed Single‐Layer Mixed‐Cation Lead Mixed‐Halide Perovskite Photodetectors Based on Nanogap Electrodes Manufactured on Large‐Area Rigid and Flexible Substrates, Advanced Functional Materials, Vol: 30, Pages: 1909758-1909758, ISSN: 1616-301X
Barrit D, Cheng P, Darabi K, et al., 2020, Room-Temperature Partial Conversion of alpha-FAPbI(3) Perovskite Phase via PbI2 Solvation Enables High-Performance Solar Cells, ADVANCED FUNCTIONAL MATERIALS, Vol: 30, ISSN: 1616-301X
Firdaus Y, He Q, Lin Y, et al., 2020, Novel wide-bandgap non-fullerene acceptors for efficient tandem organic solar cells, 10th International Conference on Materials for Advanced Technologies (ICMAT) / Symposium P on Advanced Inorganic Materials and Thin Film Technology for Solar Energy Harvesting and Electronic Application, Publisher: ROYAL SOC CHEMISTRY, Pages: 1164-1175, ISSN: 2050-7488
Tang M-C, Fan Y, Barrit D, et al., 2020, Ambient blade coating of mixed cation, mixed halide perovskites without dripping: in situ investigation and highly efficient solar cells, Publisher: ROYAL SOC CHEMISTRY, Pages: 1095-1104, ISSN: 2050-7488
Zheng X, Hou Y, Bao C, et al., 2020, Managing grains and interfaces via ligand anchoring enables 22.3%-efficiency inverted perovskite solar cells, NATURE ENERGY, Vol: 5, Pages: 131-140, ISSN: 2058-7546
Wadsworth A, Chen H, Thorley KJ, et al., 2020, Modification of Indacenodithiophene-Based Polymers and Its Impact on Charge Carrier Mobility in Organic Thin-Film Transistors, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 142, Pages: 652-664, ISSN: 0002-7863
Hallani RK, Moser M, Bristow H, et al., 2020, Low-Temperature Cross-Linking Benzocyclobutene Based Polymer Dielectric for Organic Thin Film Transistors on Plastic Substrates, JOURNAL OF ORGANIC CHEMISTRY, Vol: 85, Pages: 277-283, ISSN: 0022-3263
Troughton J, Neophytou M, Gasparini N, et al., 2020, A universal solution processed interfacial bilayer enabling ohmic contact in organic and hybrid optoelectronic devices, ENERGY & ENVIRONMENTAL SCIENCE, Vol: 13, Pages: 268-276, ISSN: 1754-5692
Kumar M, Georgiadou DG, Seitkhan A, et al., 2019, Colossal Tunneling Electroresistance in Co-Planar Polymer Ferroelectric Tunnel Junctions, ADVANCED ELECTRONIC MATERIALS, ISSN: 2199-160X
Nam S, Chaudhry MU, Tetzner K, et al., 2019, Efficient and Stable Solution-Processed Organic Light-Emitting Transistors Using a High-k Dielectric, ACS PHOTONICS, Vol: 6, Pages: 3159-3165, ISSN: 2330-4022
Lin Y-H, Li W, Faber H, et al., 2019, Hybrid organic-metal oxide multilayer channel transistors with high operational stability, NATURE ELECTRONICS, Vol: 2, Pages: 587-595, ISSN: 2520-1131
Chen H, Wadsworth A, Ma C, et al., 2019, The Effect of Ring Expansion in Thienobenzo[b]indacenodithiophene Polymers for Organic Field-Effect Transistors, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 141, Pages: 18806-18813, ISSN: 0002-7863
Chaudhry MU, Panidi J, Nam S, et al., 2019, Polymer Light-Emitting Transistors With Charge-Carrier Mobilities Exceeding 1 cm(2) V-1 s(-1), ADVANCED ELECTRONIC MATERIALS, Vol: 6, ISSN: 2199-160X
Neophytou M, De Bastiani M, Gasparini N, et al., 2019, Enhancing the Charge Extraction and Stability of Perovskite Solar Cells Using Strontium Titanate (SrTiO3) Electron Transport Layer, ACS APPLIED ENERGY MATERIALS, Vol: 2, Pages: 8090-8097, ISSN: 2574-0962
Faber H, Anthopoulos TD, 2019, Adding a new layer to 'more than Moore', NATURE ELECTRONICS, Vol: 2, Pages: 497-498, ISSN: 2520-1131
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