Publications
637 results found
Stein E, Nahor O, Stolov M, et al., 2022, Ambipolar blend-based organic electrochemical transistors and inverters, NATURE COMMUNICATIONS, Vol: 13
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- Citations: 13
Zhu G, Chen J, Duan J, et al., 2022, Fluorinated Alcohol-Processed N-Type Organic Electrochemical Transistor with High Performance and Enhanced Stability, ACS APPLIED MATERIALS & INTERFACES, ISSN: 1944-8244
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- Citations: 7
Zhao Y, Su C, Shen G, et al., 2022, Donor Engineering Tuning the Analog Switching Range and Operational Stability of Organic Synaptic Transistors for Neuromorphic Systems, ADVANCED FUNCTIONAL MATERIALS, Vol: 32, ISSN: 1616-301X
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- Citations: 14
Koklu A, Wustoni S, Guo K, et al., 2022, Convection Driven Ultrarapid Protein Detection via Nanobody-Functionalized Organic Electrochemical Transistors, ADVANCED MATERIALS, Vol: 34, ISSN: 0935-9648
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- Citations: 17
Tan STM, Lee G, Denti I, et al., 2022, Tuning Organic Electrochemical Transistor Threshold Voltage using Chemically Doped Polymer Gates, ADVANCED MATERIALS, Vol: 34, ISSN: 0935-9648
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- Citations: 8
Tan STM, Giovannitti A, Marks A, et al., 2022, Conjugated Polymers for Microwave Applications: Untethered Sensing Platforms and Multifunctional Devices, ADVANCED MATERIALS, Vol: 34, ISSN: 0935-9648
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- Citations: 8
Duan J, Zhu G, Wang L, et al., 2022, Highly Efficient Mixed Conduction in N-type Fused Small Molecule Semiconductors, ADVANCED FUNCTIONAL MATERIALS, Vol: 32, ISSN: 1616-301X
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- Citations: 11
Castillo TCH, Moser M, Cendra C, et al., 2022, Simultaneous Performance and Stability Improvement of a p-Type Organic Electrochemical Transistor through Additives, CHEMISTRY OF MATERIALS, ISSN: 0897-4756
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- Citations: 5
Nugraha MI, Gedda M, Firdaus Y, et al., 2022, Addition of diquat enhances the electron mobility in various non-fullerene acceptor molecules, Advanced Functional Materials, ISSN: 1616-301X
Molecular doping of organic semiconductors is often used to enhance their charge transport characteristics. Despite its success, however, most studies to date concern p-doping with considerably fewer reports involving n-dopants. Here, n-doping of organic thin-film transistors (OTFTs) based on several non-fullerene acceptor (NFA) molecules using the recently developed diquat (DQ) as a soluble molecular dopant is reported. The low ionization potential of DQ facilitates efficient electron transfer and subsequent n-doping of the NFAs, resulting in a consistent increase in the electron field-effect mobility. Solution-processed BTP-eC9 and N3-based OTFTs exhibit significant increase in the electron mobility upon DQ doping, with values increasing from 0.02 to 0.17 cm2 V–1 s–1 and from 0.2 to 0.57 cm2 V–1 s–1, respectively. A remarkable electron mobility of >1 cm2 V–1 s–1 is achieved for O-IDTBR transistors upon optimal doping with DQ. The enhanced performance originates primarily from synergistic effects on electronic transport and changes in morphology, including: i) significant reduction of contact resistances, ii) formation of larger crystalline domains, iii) change of preferred crystal orientation, and iv) alteration in molecular packing motif. This work demonstrates the universality of DQ as an electronic additive for improving electron transport in OTFTs.
Gonzalez-Carrero S, Kosco J, Fei T, et al., 2022, Tracking the photogenerated charges on organic semiconductors nanoparticles photocatalyst, Materials for Sustainable Development Conference (MAT-SUS), Publisher: FUNDACIO DE LA COMUNITAT VALENCIANA SCITO
Cong S, Chen J, Wang L, et al., 2022, Donor Functionalization Tuning the N-Type Performance of Donor-Acceptor Copolymers for Aqueous-Based Electrochemical Devices, ADVANCED FUNCTIONAL MATERIALS, Vol: 32, ISSN: 1616-301X
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- Citations: 16
Keene ST, Michaels W, Melianas A, et al., 2022, Efficient Electronic Tunneling Governs Transport in Conducting Polymer-Insulator Blends, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 144, Pages: 10368-10376, ISSN: 0002-7863
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- Citations: 13
Dai Y, Dai S, Li N, et al., 2022, Stretchable Redox-Active Semiconducting Polymers for High-Performance Organic Electrochemical Transistors, ADVANCED MATERIALS, Vol: 34, ISSN: 0935-9648
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- Citations: 28
Jacobs IE, Lin Y, Huang Y, et al., 2022, High-Efficiency Ion-Exchange Doping of Conducting Polymers, ADVANCED MATERIALS, Vol: 34, ISSN: 0935-9648
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- Citations: 49
Xie Z, Zhuge C, Zhao Y, et al., 2022, All-Solid-State Vertical Three-Terminal N-Type Organic Synaptic Devices for Neuromorphic Computing, ADVANCED FUNCTIONAL MATERIALS, Vol: 32, ISSN: 1616-301X
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- Citations: 19
Schafer EA, Wu R, Meli D, et al., 2022, Sources and Mechanism of Degradation in p-Type Thiophene-Based Organic Electrochemical Transistors, ACS APPLIED ELECTRONIC MATERIALS, Vol: 4, Pages: 1391-1404
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- Citations: 4
Jacoutot P, Scaccabarozzi AD, Zhang T, et al., 2022, Infrared organic photodetectors employing ultralow bandgap polymer and non-fullerene acceptors for biometric monitoring, Small, Vol: 18, Pages: 1-10, ISSN: 1613-6810
Recent efforts in the field of organic photodetectors (OPD) have been focused on extending broadband detection into the near-infrared (NIR) region. Here, two blends of an ultralow bandgap push–pull polymer TQ-T combined with state-of-the-art non-fullerene acceptors, IEICO-4F and Y6, are compared to obtain OPDs for sensing in the NIR beyond 1100 nm, which is the cut off for benchmark Si photodiodes. It is observed that the TQ-T:IEICO-4F device has a superior IR responsivity (0.03 AW-1 at 1200 nm and −2 V bias) and can detect infrared light up to 1800 nm, while the TQ-T:Y6 blend shows a lower responsivity of 0.01 AW-1. Device physics analyses are tied with spectroscopic and morphological studies to link the superior performance of TQ-T:IEICO-4F OPD to its faster charge separation as well as more favorable donor–acceptor domains mixing. In the polymer blend with Y6, the formation of large agglomerates that exceed the exciton diffusion length, which leads to high charge recombination, is observed. An application of these devices as biometric sensors for real-time heart rate monitoring via photoplethysmography, utilizing infrared light, is demonstrated.
Liao H, Chen J, Lan L, et al., 2022, Efficient n-Type Small-Molecule Mixed Ion-Electron Conductors and Application in Hydrogen Peroxide Sensors, ACS APPLIED MATERIALS & INTERFACES, Vol: 14, Pages: 16477-16486, ISSN: 1944-8244
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- Citations: 11
Kosco J, Gonzalez Carrero S, Howells CT, et al., 2022, Generation of long-lived charges in organic semiconductor heterojunction nanoparticles for efficient photocatalytic hydrogen evolution, Nature Energy, Vol: 7, Pages: 340-351, ISSN: 2058-7546
Organic semiconductor photocatalysts for the production of solar fuels are attractive as they can be synthetically tuned to absorb visible light while simultaneously retaining suitable energy levels to drive a range of processes. However, a greater understanding of the photophysics that determines the function of organic semiconductor heterojunction nanoparticles is needed to optimize performance. Here, we show that such materials can intrinsically generate remarkably long-lived reactive charges, enabling them to efficiently drive sacrificial hydrogen evolution. Our optimized hetereojunction photocatalysts comprise the conjugated polymer PM6 matched with Y6 or PCBM electron acceptors, and achieve external quantum efficiencies of 1.0% to 5.0% at 400 to 900 nm and 8.7% to 2.6% at 400 to 700 nm, respectively. Employing transient and operando spectroscopies, we find that the heterojunction structure in these nanoparticles greatly enhances the generation of long-lived charges (millisecond to second timescale) even in the absence of electron/hole scavengers or Pt. Such long-lived reactive charges open potential applications in water-splitting Z-schemes and in driving kinetically slow and technologically desirable oxidations.
Gladisch J, Oikonomou VK, Moser M, et al., 2022, An Electroactive Filter with Tunable Porosity Based on Glycolated Polythiophene, SMALL SCIENCE, Vol: 2, ISSN: 2688-4046
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- Citations: 1
Wang Y, Zeglio E, Wang L, et al., 2022, Green Synthesis of Lactone-Based Conjugated Polymers for n-Type Organic Electrochemical Transistors, ADVANCED FUNCTIONAL MATERIALS, Vol: 32, ISSN: 1616-301X
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- Citations: 26
Marks A, Chen X, Wu R, et al., 2022, Synthetic Nuances to Maximize n-Type Organic Electrochemical Transistor and Thermoelectric Performance in Fused Lactam Polymers, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 144, Pages: 4642-4656, ISSN: 0002-7863
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- Citations: 39
Moser M, Wang Y, Hidalgo TC, et al., 2022, Propylene and butylene glycol: new alternatives to ethylene glycol in conjugated polymers for bioelectronic applications, MATERIALS HORIZONS, Vol: 9, Pages: 973-980, ISSN: 2051-6347
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- Citations: 17
Karuthedath S, Gorenflot J, Firdaus Y, et al., 2022, Intrinsic efficiency limits in low-bandgap non-fullerene acceptor organic solar cells (vol 20, pg 378, 2021), NATURE MATERIALS, Vol: 21, Pages: 378-378, ISSN: 1476-1122
Jacobs IE, D'Avino G, Lemaur V, et al., 2022, Structural and Dynamic Disorder, Not Ionic Trapping, Controls Charge Transport in Highly Doped Conducting Polymers, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 144, Pages: 3005-3019, ISSN: 0002-7863
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- Citations: 29
Dimov IB, Moser M, Malliaras GG, et al., 2022, Semiconducting Polymers for Neural Applications, CHEMICAL REVIEWS, Vol: 122, Pages: 4356-4396, ISSN: 0009-2665
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- Citations: 42
Malliaras G, McCulloch I, 2022, Introduction: Organic Bioelectronics, CHEMICAL REVIEWS, Vol: 122, Pages: 4323-4324, ISSN: 0009-2665
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- Citations: 7
Lan L, Chen J, Wang Y, et al., 2022, Facilely Accessible Porous Conjugated Polymers toward High-Performance and Flexible Organic Electrochemical Transistors, CHEMISTRY OF MATERIALS, Vol: 34, Pages: 1666-1676, ISSN: 0897-4756
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- Citations: 22
Savva A, Hama A, Herrera-López G, et al., 2022, Photo-Electrochemical Stimulation of Neurons with Organic Donor-Acceptor Heterojunctions
<jats:title>Abstract</jats:title><jats:p>Recent advancements in light-responsive materials enabled the development of devices to artificially activate tissue with light, and show great potential for use in different types of therapy. Photo-stimulation based on organic semiconductors has recently attracted interest due to their unique set of properties such as biocompatibility, better mechanical match with human tissue, and strong absorption of light in the visible spectrum. Here we show the development of solution processed organic heterojunctions that are able to control the activity of primary neurons <jats:italic>in vitro</jats:italic> with light. The p-type polymer semiconductor PDCBT and the n-type polymer semiconductor ITIC (also known as non-fullerene acceptor) are simply spin coated on glass substrates forming a bilayer p-n junction with high photo-sensitivity in aqueous electrolytes. Photo-electrochemical measurements reveal that high photo-voltage and photo-current is produced, as a result of a charge transfer between the polymers and oxygen in the electrolyte. The biocompatibility of the proposed materials is addressed with live/dead assays on both primary mouse cortical neurons and human cell lines that are cultured on their surface. We have found that light of low intensity (i.e. 40 mW/cm<jats:sup>2</jats:sup>) is absorbed, and converted into a cue that triggers action potential on primary cortical neurons directly cultured on glass/PDCBT/ITIC interfaces as proven by patch clamp measurements. The activation of neurons is most likely due to photochemical reactions at the polymer/electrolyte interface that result in hydrogen peroxide, which might lead to modulation of specific ion channels on neurons membrane. Photo-thermal effects are excluded with controlled patch clamp measurements on neurons cultured on plain glass and on photoresist thin films. The profound advantages of low intensity light stimulation, simpl
Alsufyani M, Stoeckel M-A, Chen X, et al., 2022, Lactone Backbone Density in Rigid Electron-Deficient Semiconducting Polymers Enabling High n-type Organic Thermoelectric Performance, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 61, ISSN: 1433-7851
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- Citations: 22
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