Publications
639 results found
Isikgor FH, Furlan F, Liu J, et al., 2021, Concurrent cationic and anionic perovskite defect passivation enables 27.4% perovskite/silicon tandems with suppression of halide segregation, JOULE, Vol: 5, Pages: 1566-1586, ISSN: 2542-4351
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- Citations: 90
Moser M, Gladisch J, Ghosh S, et al., 2021, Controlling Electrochemically Induced Volume Changes in Conjugated Polymers by Chemical Design: from Theory to Devices, ADVANCED FUNCTIONAL MATERIALS, Vol: 31, ISSN: 1616-301X
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- Citations: 26
Koklu A, Wustoni S, Musteata V-E, et al., 2021, Microfluidic Integrated Organic Electrochemical Transistor with a Nanoporous Membrane for Amyloid-β Detection, ACS NANO, Vol: 15, Pages: 8130-8141, ISSN: 1936-0851
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- Citations: 36
Carey T, Arbab A, Anzi L, et al., 2021, Inkjet printed circuits with 2D semiconductor inks for high-performance electronics, Advanced Electronic Materials, ISSN: 2199-160X
Air-stable semiconducting inks suitable for complementary logic are key to create low-power printed integrated circuits (ICs). High-performance printable electronic inks with 2D materials have the potential to enable the next generation of high performance low-cost printed digital electronics. Here, the authors demonstrate air-stable, low voltage (<5 V) operation of inkjet-printed n-type molybdenum disulfide (MoS2), and p-type indacenodithiophene-co-benzothiadiazole (IDT-BT) field-effect transistors (FETs), estimating an average switching time of τMoS2 ≈ 4.1 μs for the MoS2 FETs. They achieve this by engineering high-quality MoS2 and air-stable IDT-BT inks suitable for inkjet-printing complementary pairs of n-type MoS2 and p-type IDT-BT FETs. They then integrate MoS2 and IDT-BT FETs to realize inkjet-printed complementary logic inverters with a voltage gain |Av| ≈ 4 when in resistive load configuration and |Av| ≈ 1.4 in complementary configuration. These results represent a key enabling step towards ubiquitous long-term stable, low-cost printed digital ICs.
Tan STM, Giovannitti A, Melianas A, et al., 2021, High-Gain Chemically Gated Organic Electrochemical Transistor, ADVANCED FUNCTIONAL MATERIALS, Vol: 31, ISSN: 1616-301X
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- Citations: 43
Surgailis J, Savva A, Druet V, et al., 2021, Mixed Conduction in an N-Type Organic Semiconductor in the Absence of Hydrophilic Side-Chains, ADVANCED FUNCTIONAL MATERIALS, Vol: 31, ISSN: 1616-301X
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- Citations: 51
Moser M, Wadsworth A, Gasparini N, et al., 2021, Challenges to the Success of Commercial Organic Photovoltaic Products, ADVANCED ENERGY MATERIALS, Vol: 11, ISSN: 1614-6832
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- Citations: 52
Iqbal HF, Ai Q, Thorley KJ, et al., 2021, Suppressing bias stress degradation in high performance solution processed organic transistors operating in air, NATURE COMMUNICATIONS, Vol: 12
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- Citations: 31
Chen X, Marks A, Paulsen BD, et al., 2021, <i>n</i>-Type Rigid Semiconducting Polymers Bearing Oligo(Ethylene Glycol) Side Chains for High-Performance Organic Electrochemical Transistors, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 60, Pages: 9368-9373, ISSN: 1433-7851
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- Citations: 70
Chen X, Marks A, Paulsen BD, et al., 2021, <i>n</i>‐Type Rigid Semiconducting Polymers Bearing Oligo(Ethylene Glycol) Side Chains for High‐Performance Organic Electrochemical Transistors, Angewandte Chemie, Vol: 133, Pages: 9454-9459, ISSN: 0044-8249
<jats:title>Abstract</jats:title><jats:p>N‐type conjugated polymers as the semiconducting component of organic electrochemical transistors (OECTs) are still undeveloped with respect to their p‐type counterparts. Herein, we report two rigid n‐type conjugated polymers bearing oligo(ethylene glycol) (OEG) side chains, PgNaN and PgNgN, which demonstrated an essentially torsion‐free π‐conjugated backbone. The planarity and electron‐deficient rigid structures enable the resulting polymers to achieve high electron mobility in an OECT device of up to the 10<jats:sup>−3</jats:sup> cm<jats:sup>2</jats:sup> V<jats:sup>−1</jats:sup> s<jats:sup>−1</jats:sup> range, with a deep‐lying LUMO energy level lower than −4.0 eV. Prominently, the polymers exhibited a high device performance with a maximum dimensionally normalized transconductance of 0.212 S cm<jats:sup>−1</jats:sup> and the product of charge‐carrier mobility <jats:italic>μ</jats:italic> and volumetric capacitance C* of 0.662±0.113 F cm<jats:sup>−1</jats:sup> V<jats:sup>−1</jats:sup> s<jats:sup>−1</jats:sup>, which are among the highest in n‐type conjugated polymers reported to date. Moreover, the polymers are synthesized via a metal‐free aldol‐condensation polymerization, which is beneficial to their application in bioelectronics.</jats:p>
He Y, Liao H, Lyu S, et al., 2021, Coupling molecular rigidity and flexibility on fused backbones for NIR-II photothermal conversion, CHEMICAL SCIENCE, Vol: 12, Pages: 5177-5184, ISSN: 2041-6520
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- Citations: 22
Paterson AF, Li R, Markina A, et al., 2021, N-Doping improves charge transport and morphology in the organic non-fullerene acceptor O-IDTBR†, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 9, Pages: 4486-4495, ISSN: 2050-7526
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- Citations: 17
Ghasemi M, Balar N, Peng Z, et al., 2021, A molecular interaction-diffusion framework for predicting organic solar cell stability, NATURE MATERIALS, Vol: 20, Pages: 525-+, ISSN: 1476-1122
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- Citations: 2
Xiao M, Carey RL, Chen H, et al., 2021, Charge transport physics of a unique class of rigid-rod conjugated polymers with fused-ring conjugated units linked by double carbon-carbon bonds, SCIENCE ADVANCES, Vol: 7, ISSN: 2375-2548
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- Citations: 17
Maria IP, Paulsen BD, Savva A, et al., 2021, The Effect of Alkyl Spacers on the Mixed Ionic-Electronic Conduction Properties of N-Type Polymers, ADVANCED FUNCTIONAL MATERIALS, Vol: 31, ISSN: 1616-301X
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- Citations: 59
dos Santos JM, Neophytou M, Wiles A, et al., 2021, Influence of alkyne spacers on the performance of thiophene-based donors in bulk-heterojunction organic photovoltaic cells, DYES AND PIGMENTS, Vol: 188, ISSN: 0143-7208
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- Citations: 5
Moser M, Savva A, Thorley K, et al., 2021, Polaron Delocalization in Donor-Acceptor Polymers and its Impact on Organic Electrochemical Transistor Performance, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, Vol: 60, Pages: 7777-7785, ISSN: 1433-7851
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- Citations: 66
Moser M, Savva A, Thorley K, et al., 2021, Polaron Delocalization in Donor–Acceptor Polymers and its Impact on Organic Electrochemical Transistor Performance, Angewandte Chemie, Vol: 133, Pages: 7856-7864, ISSN: 0044-8249
<jats:title>Abstract</jats:title><jats:p>Donor–acceptor (D‐A) polymers are promising materials for organic electrochemical transistors (OECTs), as they minimize detrimental faradaic side‐reactions during OECT operation, yet their steady‐state OECT performance still lags far behind their all‐donor counterparts. We report three D‐A polymers based on the diketopyrrolopyrrole unit that afford OECT performances similar to those of all‐donor polymers, hence representing a significant improvement to the previously developed D‐A copolymers. In addition to improved OECT performance, DFT simulations of the polymers and their respective hole polarons also reveal a positive correlation between hole polaron delocalization and steady‐state OECT performance, providing new insights into the design of OECT materials. Importantly, we demonstrate how polaron delocalization can be tuned directly at the molecular level by selection of the building blocks comprising the polymers’ conjugated backbone, thus paving the way for the development of even higher performing OECT polymers.</jats:p>
Gasparini N, Camargo FVA, Frühwald S, et al., 2021, Adjusting the energy of interfacial states in organic photovoltaics for maximum efficiency, Nature Communications, Vol: 12, Pages: 1-8, ISSN: 2041-1723
A critical bottleneck for improving the performance of organic solar cells (OSC) is minimising non-radiative losses in the interfacial charge-transfer (CT) state via the formation of hybrid energetic states. This requires small energetic offsets often detrimental for high external quantum efficiency (EQE). Here, we obtain OSC with both non-radiative voltage losses (0.24 V) and photocurrent losses (EQE > 80%) simultaneously minimised. The interfacial CT states separate into free carriers with ≈40-ps time constant. We combine device and spectroscopic data to model the thermodynamics of charge separation and extraction, revealing that the relatively high performance of the devices arises from an optimal adjustment of the CT state energy, which determines how the available overall driving force is efficiently used to maximize both exciton splitting and charge separation. The model proposed is universal for donor:acceptor (D:A) with low driving forces and predicts which D:A will benefit from a morphology optimization for highly efficient OSC.
Vasilopoulou M, da SWJ, Kim HP, et al., 2021, Free-standing nanopaper electrode for all-printed super-flexible perovskite solar cells
<jats:title>Abstract</jats:title> <jats:p>The development of all-printed, flexible solar cells of high efficiency and ultra-low weight will offer advancements for new market entrants. Herein, we report the design and fabrication of all-printed in ambient air, super-flexible perovskite solar cells with approaching 20% power conversion efficiency and extremely low weight of 5.1 g m-2 leading to an unprecedented power-to-weight ratio of 38,470 W Kg-1. This performance advance was achieved through the design of a highly transparent and conducting nanopaper used as a free-standing bottom electrode (FSBE). The FSBE consisted of cellulose nanocrystals grafted with semi-metallic super-reduced polyoxometalate clusters that enabled high conductivities up to 18 S cm-1 combined with transparency >96%. It also acted as a conformal barrier preventing performance loss upon heating at 95 oC under continuous illumination in inert environment; and strong resistance to decomposition when immersed in a mild citric acid water solution for 100 days, which we further exploit to demonstrate full device recyclability. The inherent flexibility of cellulose nanocrystals enabled remarkable flexibility of these cells under 2,000 repeated bending and folding cycles and mechanical strength upon extensive strain up to 20%. Notably, the nanopaper remained unaffected for strains up to 60%. These findings open the door for efficient and lightweight solar cells with a low environmental impact.</jats:p>
Isikgor FH, Subbiah AS, Eswaran MK, et al., 2021, Scaling-up perovskite solar cells on hydrophobic surfaces, NANO ENERGY, Vol: 81, ISSN: 2211-2855
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- Citations: 34
Karuthedath S, Gorenflot J, Firdaus Y, et al., 2021, Intrinsic efficiency limits in low-bandgap non-fullerene acceptor organic solar cells, NATURE MATERIALS, Vol: 20, Pages: 378-+, ISSN: 1476-1122
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- Citations: 217
Babics M, Bristow H, Zhang W, et al., 2021, Non-fullerene-based organic photodetectors for infrared communication, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 9, Pages: 2375-2380, ISSN: 2050-7526
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- Citations: 28
Koklu A, Ohayon D, Wustoni S, et al., 2021, Microfluidics integrated n-type organic electrochemical transistor for metabolite sensing, SENSORS AND ACTUATORS B-CHEMICAL, Vol: 329
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- Citations: 21
Xiao M, Sadhanala A, Abdi-Jalebi M, et al., 2021, Linking Glass-Transition Behavior to Photophysical and Charge Transport Properties of High-Mobility Conjugated Polymers, ADVANCED FUNCTIONAL MATERIALS, Vol: 31, ISSN: 1616-301X
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- Citations: 22
Ohayon D, Savva A, Du W, et al., 2021, Influence of Side Chains on the n-Type Organic Electrochemical Transistor Performance, ACS APPLIED MATERIALS & INTERFACES, Vol: 13, Pages: 4253-4266, ISSN: 1944-8244
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- Citations: 59
Marsh AV, Little M, Cheetham NJ, et al., 2021, Highly Deformed <i>o</i>-Carborane Functionalised Non-linear Polycyclic Aromatics with Exceptionally Long C-C Bonds, CHEMISTRY-A EUROPEAN JOURNAL, Vol: 27, Pages: 1970-1975, ISSN: 0947-6539
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- Citations: 6
Gorenflot J, Laquai F, Firdaus Y, et al., 2021, Ultrafast Energy Transfer Triggers Ionization Energy Offset Dependence of Quantum Efficiency in Low-bandgap Non-fullerene Acceptor Solar Cells, NFA-Based Organic Solar Cells: Materials, Morphology and Fundamentals, Publisher: Fundació Scito
Chen H, Moser M, Wang S, et al., 2021, Acene Ring Size Optimization in Fused Lactam Polymers Enabling High n-Type Organic Thermoelectric Performance, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 143, Pages: 260-268, ISSN: 0002-7863
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- Citations: 52
Sachs M, Cha H, Kosco J, et al., 2021, Tracking Charge Transfer to Residual Metal Clusters in Conjugated Polymers for Photocatalytic Hydrogen Evolution (vol 142, pg 14574, 2020), JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 143, Pages: 524-524, ISSN: 0002-7863
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- Citations: 1
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