Publications
509 results found
Dauzon E, Sallenave X, Plesse C, et al., 2022, Versatile methods for improving the mechanical properties of fullerene and non-fullerene bulk heterojunction layers to enable stretchable organic solar cells, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 10, Pages: 3375-3386, ISSN: 2050-7526
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- Citations: 10
Corzo D, Wang T, Gedda M, et al., 2022, A Universal Cosolvent Evaporation Strategy Enables Direct Printing of Perovskite Single Crystals for Optoelectronic Device Applications, ADVANCED MATERIALS, Vol: 34, ISSN: 0935-9648
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- Citations: 9
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
Scaccabarozzi AD, Basu A, Anies F, et al., 2022, Doping Approaches for Organic Semiconductors, CHEMICAL REVIEWS, Vol: 122, Pages: 4420-4492, ISSN: 0009-2665
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- Citations: 100
Aydin E, El-Demellawi JK, Yarali E, et al., 2022, Scaled Deposition of Ti<sub>3</sub>C<sub>2</sub>T<i><sub>x</sub></i> MXene on Complex Surfaces: Application Assessment as Rear Electrodes for Silicon Heterojunction Solar Cells, ACS NANO, Vol: 16, Pages: 2419-2428, ISSN: 1936-0851
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- Citations: 17
Peng W, Lin Y, Jeong SY, et al., 2022, Over 18% ternary polymer solar cells enabled by a terpolymer as the third component, NANO ENERGY, Vol: 92, ISSN: 2211-2855
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- Citations: 72
Kabitakis V, Gagaoudakis E, Moschogiannaki M, et al., 2022, A Low-Power CuSCN Hydrogen Sensor Operating Reversibly at Room Temperature, ADVANCED FUNCTIONAL MATERIALS, Vol: 32, ISSN: 1616-301X
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- Citations: 8
Aniés F, Qiao Z, Nugraha MI, et al., 2022, N-type polymer semiconductors incorporating para, meta, and ortho-carborane in the conjugated backbone, Polymer, Vol: 240, Pages: 124481-124481, ISSN: 0032-3861
We report on three novel n-type conjugated polymer semiconductors incorporating carborane in the polymer backbone and demonstrate their applicability in optoelectronic devices. Comparing the optoelectronic properties of para-, meta-, and ortho-carborane isomers revealed similar energetic characteristics between the different polymers, with the carborane unit acting as a “conjugation breaker”, confining electron delocalisation to the conjugated moieties. The fabrication of all-polymer organic photovoltaic (OPV) devices and thin-film transistors (TFTs) revealed some differences in device performance between the polymers, with the meta-carborane based polymer exhibiting superior performance in both OPV and TFT devices.
Loganathan K, Scaccabarozzi AD, Faber H, et al., 2022, 14 GHz schottky diodes using a p-doped organic polymer., Advanced Materials, Vol: 34, Pages: 1-8, ISSN: 0935-9648
The low carrier mobility of organic semiconductors and the high parasitic resistance and capacitance often encountered in conventional organic Schottky diodes, hinder their deployment in emerging radio frequency (RF) electronics. Here we overcome these limitations by combining self-aligned asymmetric nanogap electrodes (∼25 nm) produced by adhesion-lithography, with a high mobility organic semiconductor and demonstrate RF Schottky diodes able to operate in the 5G frequency spectrum. We used C16 IDT-BT, as the high hole mobility polymer, and studied the impact of p-doping on the diode performance. Pristine C16 IDT-BT-based diodes exhibit maximum intrinsic and extrinsic cutoff frequencies (fC ) of >100 and 6 GHz, respectively. This extraordinary performance is attributed primarily to the planar nature of the nanogap channel and the diode's small junction capacitance (< 2 pF). Doping of C16 IDT-BT with the molecular p-dopant C60 F48 , improves the diode's performance further by reducing the series resistance resulting to intrinsic and extrinsic fC of >100 and ∼14 GHz respectively, while the DC output voltage of a RF rectifier circuit increases by a tenfold. Our work highlights the importance of the planar nanogap architecture and paves the way for the use of organic Schottky diodes in large-area radio frequency electronics of the future. This article is protected by copyright. All rights reserved.
Bachevillier S, Yuan H-K, Tetzner K, et al., 2022, Planar refractive index patterning through microcontact photo-thermal annealing of a printable organic/inorganic hybrid material, MATERIALS HORIZONS, Vol: 9, Pages: 411-416, ISSN: 2051-6347
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- Citations: 5
Gutierrez-Fernandez E, Scaccabarozzi AD, Basu A, et al., 2022, Y6 Organic Thin-Film Transistors with Electron Mobilities of 2.4 cm<SUP>2</SUP> V<SUP>-1</SUP> s<SUP>-1</SUP> via Microstructural Tuning, ADVANCED SCIENCE, Vol: 9
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- Citations: 9
Kafourou P, Nugraha MI, Nikitaras A, et al., 2021, Near-IR absorbing molecular semiconductors incorporating cyanated benzothiadiazole acceptors for high performance semi-transparent n-type organic field-effect transistors, ACS Materials Letters, Vol: 4, Pages: 165-174, ISSN: 2639-4979
Small band gap molecular semiconductors are of interest for the development of transparent electronics. Here we report two near-infrared (NIR), n-type small molecule semiconductors, based upon an acceptor-donor-acceptor (A-D-A) approach. We show that the inclusion of molecular spacers between the strong electron accepting end group, 2,1,3-benzothiadiazole-4,5,6-tricarbonitrile, and the donor core affords semiconductors with very low band gaps down to 1 eV. Both materials were synthesised by a one-pot, sixfold nucleophilic displacement of a fluorinated precursor by cyanide. Significant differences in solid-state ordering and charge carrier mobility are observed depending on the nature of the spacer, with a thiophene spacer resulting in solution processed organic field-effect transistors (OFETs) exhibiting excellent electron mobility up to 1.1 cm2 V-1s-1. The use of silver nanowires as the gate electrodes enables the fabrication of semi-transparent OFET device with average visible transmission of 71% in the optical spectrum.
Liu J, Aydin E, Yin J, et al., 2021, 28.2%-efficient, outdoor-stable perovskite/silicon tandem solar cell, JOULE, Vol: 5, Pages: 3169-3186, ISSN: 2542-4351
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- Citations: 67
Khan J, Isikgor FH, Ugur E, et al., 2021, Charge Carrier Recombination at Perovskite/ Hole Transport Layer Interfaces Monitored by Time-Resolved Spectroscopy, ACS ENERGY LETTERS, Vol: 6, Pages: 4155-4164, ISSN: 2380-8195
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- Citations: 15
Fortunato L, Yarali E, Sanchez-Huerta C, et al., 2021, Rapid photodegradation of organic micro-pollutants in water using high-intensity pulsed light, JOURNAL OF WATER PROCESS ENGINEERING, Vol: 44, ISSN: 2214-7144
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- Citations: 1
Kosco J, Gonzalez-Carrero S, Howells CT, et al., 2021, Oligoethylene glycol side chains increase charge generation in organic semiconductor nanoparticles for enhanced photocatalytic hydrogen evolution, Advanced Materials, Vol: 34, Pages: 1-9, ISSN: 0935-9648
Organic semiconductor nanoparticles (NPs) composed of an electron donor/acceptor (D/A) semiconductor blend have recently emerged as an efficient class of hydrogen-evolution photocatalysts. It is demonstrated that using conjugated polymers functionalized with (oligo)ethylene glycol side chains in NP photocatalysts can greatly enhance their H2-evolution efficiency compared to their nonglycolated analogues. The strategy is broadly applicable to a range of structurally diverse conjugated polymers. Transient spectroscopic studies show that glycolation facilitates charge generation even in the absence of a D/A heterojunction, and further suppresses both geminate and nongeminate charge recombination in D/A NPs. This results in a high yield of photogenerated charges with lifetimes long enough to efficiently drive ascorbic acid oxidation, which is correlated with greatly enhanced H2-evolution rates in the glycolated NPs. Glycolation increases the relative permittivity of the semiconductors and facilitates water uptake. Together, these effects may increase the high-frequency relative permittivity inside the NPs sufficiently, to cause the observed suppression of exciton and charge recombination responsible for the high photocatalytic activities of the glycolated NPs.
Lin Y-H, Han Y, Sharma A, et al., 2021, A tri-channel oxide transistor concept for the rapid detection of biomolecules including the SARS-CoV-2 spike protein, Advanced Materials, Pages: 1-14, ISSN: 0935-9648
Solid-state transistor sensors that can detect biomolecules in real time are highly attractive for emerging bioanalytical applications. However, combining upscalable manufacturing with the required performance remains challenging. Here, an alternative biosensor transistor concept is developed, which relies on a solution-processed In2O3/ZnO semiconducting heterojunction featuring a geometrically engineered tri-channel architecture for the rapid, real-time detection of important biomolecules. The sensor combines a high electron mobility channel, attributed to the electronic properties of the In2O3/ZnO heterointerface, in close proximity to a sensing surface featuring tethered analyte receptors. The unusual tri-channel design enables strong coupling between the buried electron channel and electrostatic perturbations occurring during receptor–analyte interactions allowing for robust, real-time detection of biomolecules down to attomolar (am) concentrations. The experimental findings are corroborated by extensive device simulations, highlighting the unique advantages of the heterojunction tri-channel design. By functionalizing the surface of the geometrically engineered channel with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antibody receptors, real-time detection of the SARS-CoV-2 spike S1 protein down to am concentrations is demonstrated in under 2 min in physiological relevant conditions.
Aydin E, Altinkaya C, Smirnov Y, et al., 2021, Sputtered transparent electrodes for optoelectronic devices: Induced damage and mitigation strategies, MATTER, Vol: 4, Pages: 3549-3584, ISSN: 2590-2393
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- Citations: 24
Ma C, Chen H, Yengel E, et al., 2021, Printed Memtransistor Utilizing a Hybrid Perovskite/Organic Heterojunction Channel, ACS APPLIED MATERIALS & INTERFACES, Vol: 13, Pages: 51592-51601, ISSN: 1944-8244
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- Citations: 6
Markina A, Lin K-H, Liu W, et al., 2021, Chemical Design Rules for Non-Fullerene Acceptors in Organic Solar Cells, ADVANCED ENERGY MATERIALS, Vol: 11, ISSN: 1614-6832
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- Citations: 31
Das S, Sebastian A, Pop E, et al., 2021, Transistors based on two-dimensional materials for future integrated circuits, NATURE ELECTRONICS, Vol: 4, Pages: 786-799, ISSN: 2520-1131
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- Citations: 220
Zou Y, Cao Z, Zhang J, et al., 2021, Interfacial Model Deciphering High-Voltage Electrolytes for High Energy Density, High Safety, and Fast-Charging Lithium-Ion Batteries, ADVANCED MATERIALS, Vol: 33, ISSN: 0935-9648
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- Citations: 85
Peng W, Lin Y, Jeong SY, et al., 2021, Using Two Compatible Donor Polymers Boosts the Efficiency of Ternary Organic Solar Cells to 17.7%, CHEMISTRY OF MATERIALS, Vol: 33, Pages: 7254-7262, ISSN: 0897-4756
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- Citations: 29
Lin Y, Magomedov A, Firdaus Y, et al., 2021, 18.4 % Organic Solar Cells Using a High Ionization Energy Self-Assembled Monolayer as Hole-Extraction Interlayer, CHEMSUSCHEM, Vol: 14, Pages: 3569-3578, ISSN: 1864-5631
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- Citations: 100
Dauzon E, Sallenave X, Plesse C, et al., 2021, Pushing the Limits of Flexibility and Stretchability of Solar Cells: A Review, ADVANCED MATERIALS, Vol: 33, ISSN: 0935-9648
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- Citations: 36
Sakai N, Warren R, Zhang F, et al., 2021, Adduct-based p-doping of organic semiconductors, NATURE MATERIALS, Vol: 20, Pages: 1248-+, ISSN: 1476-1122
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- Citations: 30
Mohan L, Ratnasingham SR, Panidi J, et al., 2021, Determining out-of-plane hole mobility in CuSCN via the time-of-flight technique to elucidate its function in perovskite solar cells, ACS Applied Materials and Interfaces, Vol: 13, Pages: 38499-38507, ISSN: 1944-8244
Copper(I) thiocyanate (CuSCN) is a stable, low-cost, solution-processable p-type inorganic semiconductor used in numerous optoelectronic applications. Here, for the first time, we employ the time-of-flight (ToF) technique to measure the out-of-plane hole mobility of CuSCN films, enabled by the deposition of 4 μm-thick films using aerosol-assisted chemical vapor deposition (AACVD). A hole mobility of ∼10–3 cm2/V s was measured with a weak electric field dependence of 0.005 cm/V1/2. Additionally, by measuring several 1.5 μm CuSCN films, we show that the mobility is independent of thickness. To further validate the suitability of our AACVD-prepared 1.5 μm-thick CuSCN film in device applications, we demonstrate its incorporation as a hole transport layer (HTL) in methylammonium lead iodide (MAPbI3) perovskite solar cells (PSCs). Our AACVD films result in devices with measured power conversion efficiencies of 10.4%, which compares favorably with devices prepared using spin-coated CuSCN HTLs (12.6%), despite the AACVD HTLs being an order of magnitude thicker than their spin-coated analogues. Improved reproducibility and decreased hysteresis were observed, owing to a combination of excellent film quality, high charge-carrier mobility, and favorable interface energetics. In addition to providing a fundamental insight into charge-carrier mobility in CuSCN, our work highlights the AACVD methodology as a scalable, versatile tool suitable for film deposition for use in optoelectronic devices.
Nam S, Khim D, Martinez GT, et al., 2021, Significant Performance Improvement in n-Channel Organic Field-Effect Transistors with C<sub>60</sub>:C<sub>70</sub> Co-Crystals Induced by Poly(2-ethyl-2-oxazoline) Nanodots, ADVANCED MATERIALS, Vol: 33, ISSN: 0935-9648
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- Citations: 7
Marina S, Scaccabarozzi AD, Gutierrez-Fernandez E, et al., 2021, Polymorphism in Non-Fullerene Acceptors Based on Indacenodithienothiophene, ADVANCED FUNCTIONAL MATERIALS, Vol: 31, ISSN: 1616-301X
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- Citations: 30
Zhang T, Moser M, Scaccabarozzi A, et al., 2021, Ternary organic photodetectors based on pseudo–binaries nonfullerene–based acceptors, Journal of Physics: Materials, Vol: 4, Pages: 1-8, ISSN: 2515-7639
The addition of a third component to a donor:acceptor blend is a powerful tool to enhance the power conversion efficiency of organic solar cells. Featuring a similar operating mechanism, organic photodetectors are also expected to benefit from this approach. Here, we fabricated ternary organic photodetectors, based on a polymer donor and two nonfullerene acceptors, resulting in a low dark current of 0.42 nA cm−2 at −2 V and a broadband specific detectivity of 1012 Jones. We found that exciton recombination in the binary blend is reduced in ternary devices due to the formation of a pseudo-binary microstructure with mixed donor–acceptor phases. With this approach a wide range of intermediate open-circuit voltages is accessible, without sacrificing light-to-current conversion. This results in ternary organic photodetector (TOPD) with improved Responsivity values in the near-infrared. Moreover, morphology analyses reveal that TOPD devices showed improved microstructure ordering and consequentially higher charge carrier mobilities compared to the reference devices.
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