Article
Chemistry, Physical
Vivian Nketia-Yawson, Benjamin Nketia-Yawson, Jea Woong Jo
Summary: Perovskite-based flexible field-effect transistors (FETs) often have low performance due to the use of conventional polymer dielectrics. To improve charge-carrier transport, interfacial and compositional engineering has been employed. In this study, the interfacial engineering of a perovskite surface using solution-processed poly(3-hexylthiophene) (P3HT) enabled the use of an electrolyte dielectric. The P3HT-capped FAPbI3 FETs exhibited the best hole mobility of 24.55 cm2 V-1 s-1 on a plastic substrate at sub-2 V.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Maiza S. Ozorio, Douglas H. Vieira, Gabriel L. Nogueira, Cibely S. Martin, Neri Alves, Carlos J. L. Constantino
Summary: This study evaluated the performance of water-gated field-effect transistors (WGFETs) with different gate electrodes, and found that the choice of gate electrode significantly impacts the main parameters of the device. Graphite pencil (GP) as the gate electrode showed the best performance, with the lowest subthreshold swing and the highest transconductance.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Han Xu, Renrui Fang, Shuyu Wu, Junjie An, Woyu Zhang, Chao Li, Jikai Lu, Yue Li, Xiaoxin Xu, Yan Wang, Qi Liu, Dashan Shang
Summary: This study introduces a Li-ion-based EGT (Li-EGT) with a write-read delay of 3 ms, multiple states, low energy consumption, and quasi-linear weight update. The short write-read delay of the device is attributed to the permeable interface between electrolyte and gate electrode. Leveraging the Li-EGT characteristic, near-ideal accuracy is achieved in the neural network simulation.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jun Li, Yuxing Lei, Zexin Wang, Hu Meng, Wenkui Zhang, Mengjiao Li, Qiuyun Tan, Zeyuan Li, Wei Guo, Shengkai Wen, Jianhua Zhang
Summary: This study presents a scheme based on a lateral-gate structure to achieve high-density integration of electrolyte-gated transistors (EGTs). An electrolyte framework with zeolitic imidazolate frameworks-67 is developed to enhance the array performance. The integrated array demonstrates high performance and homogeneity, providing a solid reference for the integration of EGTs.
Article
Materials Science, Multidisciplinary
Mona Azimi, Arunprabaharan Subramanian, Jiaxin Fan, Francesca Soavi, Fabio Cicoira
Summary: This study investigates the use of iongel and hydrogel as gating media for EGTs with the organic semiconductor DPP-DTT as the channel material. It is found that iongel-gated transistors show better electrical stability compared to hydrogel-gated transistors due to the dehydration of hydrogels over time. By adding glycerol as an anti-dehydrating agent, the operational stability of the devices is improved. Flexible EGTs on PET are also fabricated and can operate under different bending radii.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Energy & Fuels
Chaoran Qin, Xiaoyi Wu, Cui Huang, Bo Duan, Jinping Zhou, Hongye Yang, Ang Lu
Summary: In this study, a tooth-derived supercapacitor was fabricated for the first time, demonstrating excellent performance and potential for applications in energy storage field.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Nanoscience & Nanotechnology
Yang Ming Fu, Hu Li, Long Huang, Tianye Wei, Faricha Hidayati, Aimin Song
Summary: Electrolyte-gated transistors have shown promise for neuromorphic applications, and can mimic synaptic plasticity as well as synaptic metaplasticity behaviors. In this study, indium-gallium-zinc-oxide thin-film transistors gated with SiO2 electrolytes were fabricated and successfully replicated spiking-width-dependent and spiking-height-dependent metaplasticity behaviors. A physical model based on electric-double-layer coupling, RC circuit theory, and stretched-exponential diffusion was proposed and fit well with the experimental data. Additionally, the Bienenstock, Cooper, and Munro learning rule, which describes threshold-tunable and spiking-rate-dependent plasticity behaviors, was successfully emulated.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Nicolo Lago, Marco Buonomo, Sara Ruiz-Molina, Andrea Pollesel, Rafael Cintra Hensel, Francesco Sedona, Mauro Sambi, Marta Mas-Torrent, Stefano Casalini, Andrea Cester
Summary: In this study, a blend of 2,8-Difluoro-5,11-bis(triethylsilylethynyl)anthradithiophene (diFTES-ADT) and polystyrene (PS) was used as the active material for the fabrication of dual-gate EGOFETs. A digital feedback mechanism using the back-gate electrode to dynamically compensate for the transistor threshold voltage was implemented to improve the stability of EGOFETs and enable prolonged testing. This real-time threshold voltage compensation not only stabilizes the DC output current of EGOFETs but also preserves their sensing capability for low-frequency signals.
ORGANIC ELECTRONICS
(2022)
Article
Multidisciplinary Sciences
Marcos Luginieski, Marlus Koehler, Jose P. M. Serbena, Keli F. Seidel
Summary: A charge carrier transport model is proposed to describe the operation modes of electrolyte-gated field effect transistors and organic electrochemical transistors (OECTs), including non-ideal ones. The model considers 2D or 3D percolation transport (PT) and the influence of shallow exponential trap distribution on transport. The model is able to accurately fit experimental data from electrolyte-gated organic field effect transistors and OECTs, demonstrating its versatility.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Nanoscience & Nanotechnology
Xiao Zou, Jiyue Zou, Lu Liu, Hongjiu Wang, Jing-Ping Xu
Summary: The study demonstrates the use of negative capacitance to gate two-dimensional molybdenum disulfide transistors, showing stable effects and competitive electrical characteristics under specific conditions.
Article
Materials Science, Multidisciplinary
Xiao-Lin Wang, Fei Shan, Han-Lin Zhao, Jae-Yun Lee, Suchang Yoo, Heung Gyoon Ryu, Seungkeun Choi, Tukhtaev Anvar, Sung-Jin Kim
Summary: The study improved the performance of In2O3-based TFTs by using an Al2O3/F-SAM double-gate dielectric layer, reducing leakage current and enhancing stability; the results show that this double-layer gate dielectric layer can enhance not only the performance of In2O3-based TFTs, but also other metal oxide-based devices, by reducing leakage current and improving performance at low operating voltages.
ELECTRONIC MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Khalil Chennit, Najmeh Delavari, Samia Mekhmoukhen, Rassen Boukraa, Laure Fillaud, Samia Zrig, Nicolas Battaglini, Benoit Piro, Vincent Noel, Igor Zozoulenko, Giorgio Mattana
Summary: This article presents the first example of inkjet-printed, electrolyte-gated organic field-effect transistors fabricated on flexible polyimide substrates. The performance of inkjet-printed, coplanar devices is compared to those of transistors with a metallic wire gate electrode. Good quantitative agreement is achieved between simulation and experiments, indicating the potential use of NPP simulations as predictive tools for device design and optimization. This study opens up avenues for the development of low-cost, flexible sensors and circuits.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Shengqu Liu, Yuehui Zhong, Xiaoling Zhang, Menghan Pi, Xiaoyu Wang, Ruijie Zhu, Wei Cui, Rong Ran
Summary: In this study, a durable supercapacitor with remarkable capacitance retention under mechanical deformation is developed by utilizing a double-network hydrogel as an electrolyte. The hydrogel electrolyte, prepared by soaking in a high concentration of ZnSO4 solution, exhibits high deformability and adhesion to diverse surfaces. The resulting flexible supercapacitor shows high specific capacitance and excellent capacitance retention under tension, compression, and bending, even after 4000 charge-discharge cycles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Hua Li, Jianan Wang, Gregory G. Warr, Rob Atkin
Summary: The dynamics of self-assembled liquid nanostructures of ionic liquids near a mica surface were determined using video-rate atomic force microscopy (AFM) data. The AFM videos revealed that the nanostructures near the surface diffused much slower than individual ions in the bulk. This finding has important implications for processes involving concentrated electrolyte interfacial dynamics.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Fazel Zare Bidoky, C. Daniel Frisbie
Summary: In this study, n-type ZnO-based electrolyte-gated transistors (EGTs) with short signal propagation delays are fabricated and characterized. By minimizing parasitic resistances and capacitances, the switching time is significantly reduced, enabling stable switching at higher frequencies.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Julia Mestres, Francesca Leonardi, Klaus Mathwig
Summary: Electrochemical sensors are powerful tools for detecting and monitoring analytes in real-time. This study focuses on the protective effects of different EUDRAGIT(R) controlled release acrylate copolymers on electrode surfaces. The results demonstrate that amperometric sensing is a practical and straightforward technique for real-time monitoring of EUDRAGIT(R) dissolution profiles.
Article
Nanoscience & Nanotechnology
Jinghai Li, Adara Babuji, Lamiaa Fijahi, Ann Maria James, Roland Resel, Tommaso Salzillo, Raphael Pfattner, Carmen Ocal, Esther Barrena, Marta Mas-Torrent
Summary: In this study, it was found that contact resistance and charge trapping are two key obstacles that negatively affect the performance of organic field-effect transistors (OFETs). By using CH3CN vapor annealing and doping procedures, the interfacial shallow traps and deeper traps in the organic semiconductor (OSC) film can be effectively reduced, resulting in a significant reduction of contact resistance. Moreover, the devices treated with I2/CH3CN demonstrate ideal electrical characteristics with negligible levels of shallow/deep traps and highly gate-independent mobility. Therefore, this work highlights the promising synergistic effects of simultaneous solvent vapor annealing and doping, which can effectively eliminate contact resistance problems in OSC films.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
J. Alejandro De Sousa, Raphael Pfattner, Diego Gutierrez, Kilian Jutglar, T. Bromley Stefan, Jaume Veciana, Concepcio Rovira, Marta Mas-Torrent, Bruno Fabre, Nuria Crivillers
Summary: The preparation of monolayers based on an organic radical and its diamagnetic counterpart has been investigated on hydrogen-terminated silicon surfaces. The monolayers exhibit a characteristic diode behavior in solid-state metal/monolayer/semiconductor junctions, which is influenced by the electronic characteristics of the organic molecule. The presence of the radical significantly enhances the rectification ratio and photosensitivity of the junction.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Lamiaa Fijahi, Jinghai Li, Adrian Tamayo, Martina Volpi, Guillaume Schweicher, Yves H. Geerts, Marta Mas-Torrent
Summary: Solution shearing deposition techniques for organic semiconductors are attractive for device implementation, but high deposition speeds require concentrated solutions. This study explores the conditions for processing alkylated DNTT and S-shaped pi-core derivative S-DNTT using bar-assisted meniscus shearing at high speed. The S-DNTT derivative significantly improves solubility and achieves a field-effect mobility two orders of magnitude higher than less soluble linear derivatives.
Article
Materials Science, Multidisciplinary
Jinghai Li, Adrian Tamayo, Aleix Quintana, Sergi Riera-Galindo, Raphael Pfattner, Yanyan Gong, Marta Mas-Torrent
Summary: The use of blends of small molecule organic semiconductors (OSCs) with insulating binding polymers can facilitate the processing of OSCs over large areas using printing techniques. The nature of the binding polymer significantly impacts the device performance, with blends of polystyrene (PS) showing the best performance in terms of mobility, threshold voltage, and bias stress stability. On the other hand, blends with poly(methyl methacrylate) (PMMA) exhibit the lowest performance due to higher density of hole traps. For UV light response, blends with poly(pentafluorostyrene) (PFS) and pristine films demonstrate the highest photoresponse due to higher density of electron traps. The binding polymer proves to be a useful tool in optimizing the electrical characteristics and photoresponsivity of the organic field-effect transistors (OFETs).
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Jinghai Li, Elisabetta Colantoni, Ines Temino, Paolo Branchini, Luca Tortora, Marta Mas-Torrent
Summary: Molecular contact doping is an efficient strategy to reduce device contact resistance in organic field-effect transistors (OFETs). However, dopant diffusion poses a challenge to its implementation as it hampers device performance. In this study, OFETs based on C8-BTBT-C8 were fabricated and the performance was significantly improved by inserting a layer of the p-dopant F4TCNQ. The diffusion of the dopant was controlled by blending the OSC with PS of different molecular weights, resulting in enhanced long-term device stability.
CHEMISTRY OF MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Anna Fortunato, Rafael Cintra Hensel, Stefano Casalini, Miriam Mba
Summary: The conjugation of small-molecule semiconductors with self-assembling peptides facilitates the fabrication of supramolecular soft materials for organic electronics and bioelectronics. In this study, the benchmark organic semiconductor benzothieno[3,2-b][1]-benzothiophene (BTBT) was introduced into a self-assembling amphipathic peptide structure. The resulting hydrogels exhibited a fibrillar structure, and spectroscopic studies confirmed that hydrogen bonding and pi-pi stacking were responsible for the observed 3D fibrillar network. The hydrogel showed conductivity when deposited on gold interdigitated electrodes, with a measured value of 1.6 (+/- 0.1) x 10(-5) S cm(-1).
Article
Chemistry, Physical
Adrian Tamayo, Angel Campos-Lendinez, Jose Munoz, Nuria Crivillers, Marta Mas-Torrent
Summary: A robust electrolyte-gated organic field-effect transistor (EGOFET) that can respond to pH in the range of 1-10 is reported. The sensor uses the pH-dependent supramolecular host-guest complexation of imidazole/beta-cyclodextrin to achieve response to different pH substances.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Adrian Tamayo, Jose Munoz, Carme Martinez-Domingo, Marta Mas-Torrent
Summary: In this article, we propose a new method to fabricate electrolyte-gated organic field-effect transistor (EGOFET) sensors using magnetic carbon-paste gate electrodes, which can be polished and re-used after each measurement. High sensitivities and low limits of detection are achieved, demonstrating the potential of EGOFETs as versatile sensing platforms.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Simona Ricci, Marco Buonomo, Stefano Casalini, Sara Bonacchi, Moreno Meneghetti, Lucio Litti
Summary: In this study, two novel formulations of Au nanoparticle-based inks were used to manufacture nanostructured and conductive thin films via inkjet printing. These films demonstrated high electrical and optical performances, with sheet resistance of 10.8 +/- 4.1 ohm per square and significant SERS activity. The use of minimal stabilizers and sintering was achieved, highlighting the feasibility and potential of this technique.
NANOSCALE ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Angel Campos-Lendinez, Jose Munoz, Nuria Crivillers, Marta Mas-Torrent
Summary: By combining redox molecules and quantum dots, a robust and versatile electrochemical fluorescence switch has been developed, showing great potential in sensing and information storage applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Raphael Pfattner, Elena Laukhina, Jinghai Li, Rossella L. Zaffino, Nuria Aliaga-Alcalde, Marta Mas-Torrent, Vladimir Laukhin, Jaume Veciana
Summary: Composites with different components exhibit unique synergistic properties, and the energy bandgap in their electronic structure can be tuned to design tailor-made systems. A study found an emergent insulator-metal transition in bilayered thin-films at room temperature, and the electrical/optical bandgaps could be adjusted. This makes these materials ideal candidates for flexible and soft sensors for various applications.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
