416 results found
Electronic doping of organic semiconductors is essential for their usage in highly efficient optoelectronic devices. Although molecular and metal complex-based dopants have already enabled significant progress of devices based on organic semiconductors, there remains a need for clean, efficient and low-cost dopants if a widespread transition towards larger-area organic electronic devices is to occur. Here we report dimethyl sulfoxide adducts as p-dopants that fulfil these conditions for a range of organic semiconductors. These adduct-based dopants are compatible with both solution and vapour-phase processing. We explore the doping mechanism and use the knowledge we gain to 'decouple' the dopants from the choice of counterion. We demonstrate that asymmetric p-doping is possible using solution processing routes, and demonstrate its use in metal halide perovskite solar cells, organic thin-film transistors and organic light-emitting diodes, which showcases the versatility of this doping approach.
Wahyudi W, Ladelta V, Tsetseris L, et al., 2021, Lithium-Ion Desolvation Induced by Nitrate Additives Reveals New Insights into High Performance Lithium Batteries, ADVANCED FUNCTIONAL MATERIALS, ISSN: 1616-301X
Fallon KJ, Wijeyasinghe N, Leventis A, et al., 2021, Tyrian purple: an ancient natural dye for cross-conjugated n-type charge transport, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 9, Pages: 4200-4205, ISSN: 2050-7526
Kim H, Nugraha M, Guan X, et al., 2021, All-Solution-Processed Quantum Dot Electrical Double-Layer Transistors Enhanced by Surface Charges of Ti3C2Tx MXene Contacts, ACS NANO, Vol: 15, Pages: 5221-5229, ISSN: 1936-0851
Paterson AF, Li R, Markina A, et al., 2021, N-Doping improves charge transport and morphology in the organic non-fullerene acceptor O-IDTBR dagger, JOURNAL OF MATERIALS CHEMISTRY C, ISSN: 2050-7526
Heeney M, Kafourou P, Park B, et al., 2021, One-step six-fold cyanation of benzothiadiazole acceptor Units for air-stable high-performance n-type organic field-effect transistors, Angewandte Chemie International Edition, Vol: 60, Pages: 5970-5977, ISSN: 1433-7851
We report a new high electron affinity acceptor end group for organic semiconductors, 2,1,3-benzothiadiazole-4,5,6-tricarbonitrile (TCNBT). An n-type organic semiconductor with an indacenodithiophene (IDT) core and TCNBT end groups was synthesized by a six-fold nucleophilic substitution with cyanides on a fluorinated precursor, itself prepared by a direct arylation approach. This one-step chemical modification was found to significantly impact the molecular properties: the fluorinated precursor, TFBT IDT, a poor ambipolar semiconductor, was converted into TCNBT IDT, a good n-type semiconductor. The highly electron-deficient end group TCNBT dramatically decreased the energy of the highest occupied and lowest unoccupied molecular orbitals (HOMO/LUMO) compared to the fluorinated analogue and improved the molecular orientation when utilized in n-type organic field-effect transistors (OFETs). Solution-processed OFETs based on TCNBT IDT exhibited a charge carrier mobility of up to µ e ≈ 0.15 cm 2 V -1 s -1 with excellent ambient stability for 100 hours, highlighting the benefits of the cyanated end group and the synthetic approach.
Kafourou P, Park B, Luke J, et al., 2021, One‐step sixfold cyanation of benzothiadiazole acceptor units for air‐stable high‐performance n‐type organic field‐effect transistors, Angewandte Chemie, Vol: 133, Pages: 6035-6042, ISSN: 0044-8249
Reported here is a new high electron affinity acceptor end group for organic semiconductors, 2,1,3‐benzothiadiazole‐4,5,6‐tricarbonitrile (TCNBT). An n‐type organic semiconductor with an indacenodithiophene (IDT) core and TCNBT end groups was synthesized by a sixfold nucleophilic substitution with cyanide on a fluorinated precursor, itself prepared by a direct arylation approach. This one‐step chemical modification significantly impacted the molecular properties: the fluorinated precursor, TFBT IDT, a poor ambipolar semiconductor, was converted into TCNBT IDT, a good n‐type semiconductor. The electron‐deficient end group TCNBT dramatically decreased the energy of the highest occupied and lowest unoccupied molecular orbitals (HOMO/LUMO) compared to the fluorinated analogue and improved the molecular orientation when utilized in n‐type organic field‐effect transistors (OFETs). Solution‐processed OFETs based on TCNBT IDT exhibited a charge‐carrier mobility of up to μe≈0.15 cm2 V−1 s−1 with excellent ambient stability for 100 hours, highlighting the benefits of the cyanated end group and the synthetic approach.
Hodsden T, Thorley KJ, Basu A, et al., 2021, The influence of alkyl group regiochemistry and backbone fluorination on the packing and transistor performance of N-cyanoimine functionalised indacenodithiophenes, Materials Advances, Vol: 2, Pages: 1706-1714
The synthesis of two novel n-type molecular organic semiconductors based on a fluorinated indacenodithiophene core in combination with an electron withdrawing N-cyanoimine group is reported, and the influence of the regiochemistry of the solubilizing sidechain is investigated. The N-cyanoimine is confirmed to be a strongly electron accepting group, which in combination with the core fluorination resulted in high electron affinities for both materials. Single crystal analysis demonstrated that whilst both materials arrange in ordered slipped stacks with close π–π stacking distances (∼3.40 Å), significant differences in electron transfer integrals for the two regioisomers were observed, relating to differences in relative molecular displacement along the π-stacking direction. Organic thin-film transistors fabricated via blade-coating displayed electron mobility up to 0.13 cm2 V−1 s−1 for the isomer with the larger transfer integral.
Wang B, Scaccabarozzi AD, Wang H, et al., 2021, Molecular doping of near-infrared organic photodetectors for photoplethysmogram sensors, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 9, Pages: 3129-3135, ISSN: 2050-7526
Tang M-C, Dang HX, Lee S, et al., 2021, Wide and Tunable Bandgap MAPbBr(3-x)Cl(x) Hybrid Perovskites with Enhanced Phase Stability: In Situ Investigation and Photovoltaic Devices, SOLAR RRL, ISSN: 2367-198X
Isikgor FH, Subbiah AS, Eswaran MK, et al., 2021, Scaling-up perovskite solar cells on hydrophobic surfaces, NANO ENERGY, Vol: 81, ISSN: 2211-2855
Tang M-C, Zhang S, Magnanelli TJ, et al., 2021, Unraveling the compositional heterogeneity and carrier dynamics of alkali cation doped 3D/2D perovskites with improved stability, MATERIALS ADVANCES, Vol: 2
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
Li Q, Cao Z, Wahyudi W, et al., 2021, Unraveling the New Role of an Ethylene Carbonate Solvation Shell in Rechargeable Metal Ion Batteries, ACS ENERGY LETTERS, Vol: 6, Pages: 69-78, ISSN: 2380-8195
Liu J, Ye G, Potgieser HGO, et al., 2021, Amphipathic Side Chain of a Conjugated Polymer Optimizes Dopant Location toward Efficient N-Type Organic Thermoelectrics, ADVANCED MATERIALS, Vol: 33, ISSN: 0935-9648
Abdullah I, Emyr Macdonald J, Lin Y-H, et al., 2021, Bias stability of solution-processed In2O3 thin film transistors, JOURNAL OF PHYSICS-MATERIALS, Vol: 4
Gedda M, Yengel E, Faber H, et al., 2020, Ruddlesden-Popper-Phase Hybrid Halide Perovskite/Small-Molecule Organic Blend Memory Transistors, ADVANCED MATERIALS, Vol: 33, ISSN: 0935-9648
Firdaus Y, Ho CHY, Lin Y, et al., 2020, Efficient Double- and Triple-Junction Nonfullerene Organic Photovoltaics and Design Guidelines for Optimal Cell Performance, ACS ENERGY LETTERS, Vol: 5, Pages: 3692-3701, ISSN: 2380-8195
Lin Y, Nugraha MI, Firdaus Y, et al., 2020, A Simple n-Dopant Derived from Diquat Boosts the Efficiency of Organic Solar Cells to 18.3%, ACS ENERGY LETTERS, Vol: 5, Pages: 3663-3671, ISSN: 2380-8195
Fan Q, An Q, Lin Y, et al., 2020, Over 14% efficiency all-polymer solar cells enabled by a low bandgap polymer acceptor with low energy loss and efficient charge separation, ENERGY & ENVIRONMENTAL SCIENCE, Vol: 13, Pages: 5017-5027, ISSN: 1754-5692
Basu A, Niazi MR, Scaccabarozzi AD, et al., 2020, Impact of p-type doping on charge transport in blade-coated small-molecule:polymer blend transistors, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 8, Pages: 15368-15376, ISSN: 2050-7526
Barrit D, Zhang Y, Yang T, et al., 2020, Sequential Formation of Tunable-Bandgap Mixed-Halide Lead-Based Perovskites: In Situ Investigation and Photovoltaic Devices, SOLAR RRL, Vol: 5, ISSN: 2367-198X
Liu J, van der Zee B, Alessandri R, et al., 2020, N-type organic thermoelectrics: demonstration of ZT > 0.3, NATURE COMMUNICATIONS, Vol: 11, ISSN: 2041-1723
Bristow H, Jacoutot P, Scaccabarozzi AD, et al., 2020, Nonfullerene-Based Organic Photodetectors for Ultrahigh Sensitivity Visible Light Detection, ACS APPLIED MATERIALS & INTERFACES, Vol: 12, Pages: 48836-48844, ISSN: 1944-8244
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, Vol: 14, Pages: 14036-14046, ISSN: 1936-0851
Karuthedath S, Gorenflot J, Firdaus Y, et al., 2020, Intrinsic efficiency limits in low-bandgap non-fullerene acceptor organic solar cells, NATURE MATERIALS, Vol: 20, Pages: 378-+, ISSN: 1476-1122
Georgiadou DG, Semple J, Sagade AA, et al., 2020, 100 GHz zinc oxide Schottky diodes processed from solution on a wafer scale, NATURE ELECTRONICS, Vol: 3, Pages: 718-725, ISSN: 2520-1131
Firdaus Y, Le Corre VM, Karuthedath S, et al., 2020, Long-range exciton diffusion in molecular non-fullerene acceptors, NATURE COMMUNICATIONS, Vol: 11, ISSN: 2041-1723
Kakavelakis G, Gedda M, Panagiotopoulos A, et al., 2020, Metal Halide Perovskites for High-Energy Radiation Detection, ADVANCED SCIENCE, Vol: 7
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, Vol: 6, ISSN: 2199-160X
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.