Article
Multidisciplinary Sciences
Yao Yao, Wei Huang, Jianhua Chen, Gang Wang, Hongming Chen, Xinming Zhuang, Yibin Ying, Jianfeng Ping, Tobin J. Marks, Antonio Facchetti
Summary: High-performance EGT complementary circuits with balanced electrical output for both p-type and n-type components have been achieved, enabling ultrahigh voltage gains and low driving voltages. NAND and NOR logic circuits with excellent logic response and impressive mechanical flexibility have been realized. The HCIN also enables amplification and monitoring of EOG signals, critical for wearable medical sensors and human-computer interaction interfaces.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Nanoscience & Nanotechnology
Kyung Gook Cho, Kyoung Hwan Seol, Min Su Kim, Kihyon Hong, Keun Hyung Lee
Summary: In this study, a simple strategy for systematically tuning the threshold voltage of electrolyte-gated transistors (EGTs) was presented. By controlling the electrochemical doping of electrolyte ions, the threshold voltage and other transistor characteristics can be precisely controlled. This study opens a route for controlling the device characteristics of ionogel-based electronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Rogerio Morais, Douglas Henrique Vieira, Maykel dos Santos Klem, Cristina Gaspar, Luis Pereira, Rodrigo Martins, Neri Alves
Summary: Printed electronics is an important research area aiming to develop low-cost, eco-friendly, and biodegradable electronic devices. Researchers have successfully fabricated printed EGTs with in-plane gate transistor architecture based on zinc oxide nanoparticles, and found that they exhibit comparable performance to standard top-gate EGTs.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Electrochemistry
Sandra Vasilijevic, Giorgio Mattana, Guillaume Anquetin, Nicolas Battaglini, Benoit Piro
Summary: In this study, a surfactant-free formulation of inkjet-printable graphene oxide (GO) is developed, and the morphology of the printed layers on gold bottom-contact field-effect transistors is studied. A green electrochemical in-situ approach to reduce non-conducting GO into its conductive reduced form, rGO, is described, showing a significant effect on the electrical characteristics of rGO in the EGFET configuration. The tuning of doping level of rGO as a function of reduction time leads to modulation of charge carriers' mobility over more than one order of magnitude.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Christian Eckel, Jakob Lenz, Armantas Melianas, Alberto Salleo, R. Thomas Weitz
Summary: Electrolyte-gated organic transistors (EGOTs) are promising neuromorphic devices that can outperform CMOS in terms of processing speed and energy consumption. Nanoscopic vertical EGOTs can be used to reversibly switch channel conductivity and mimic synaptic functions, providing the possibility to emulate biological nerve cells.
Article
Nanoscience & Nanotechnology
Chi-Hsin Huang, Yalun Tang, Tzu-Yi Yang, Yu-Lun Chueh, Kenji Nomura
Summary: Research has developed a high-performance p-channel oxide thin-film transistor (TFT) using an atomically thin p-type tin monoxide (SnO) channel, demonstrating good device performance. N-channel oxide TFTs and low-power complementary inverter circuits have been successfully fabricated using metal-liquid printing technology.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Alina S. Sharova, Mario Caironi
Summary: Edible electronics, utilizing edible materials in electronic devices, proposes the use of honey as an electrolytic gate viscous dielectric in electrolyte-gated organic field-effect transistors (OFETs) to achieve low voltage operation and integrated logic circuits.
ADVANCED MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Yang Ming Fu, Hu Li, Tianye Wei, Long Huang, Faricha Hidayati, Aimin Song
Summary: The temperature-dependent synaptic plasticity behaviors in indium gallium-zinc oxide thin-film transistors gated with sputtered Si0 2 electrolytes were studied. It was found that with increasing temperature, the electrolyte capacitance decreases, the mobility increases, and the threshold voltage shifts negatively. In addition, the post-synaptic current (PSC) at the resting state increases, and the PSC signal amplitude and retention time decrease under a single gate pulse. A physical model based on electric field-induced ion drifting, ionic-electronic coupling, and gradient-coordinated ion diffusion was proposed to explain these temperature-dependent synaptic behaviors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sandra Vasilijevic, Rassen Boukraa, Nicolas Battaglini, Benoit Piro
Summary: Graphene, a two-dimensional material with remarkable physicochemical characteristics, is highly sensitive to its electronic and electrostatic environment. Its use as a sensitive material in field-effect transistors (FETs) for biodetection purposes has been widely studied. This review provides an overview of the state of the art of graphene-based materials in electrolyte-gated graphene field-effect transistors (EGGFETs) for biosensing applications. Various methods for producing graphene-based materials for such devices are discussed, with a particular emphasis on inkjet printing. The recent works on the use of FETs in biosensing applications are also reviewed.
Article
Engineering, Electrical & Electronic
Douglas Henrique Vieira, Gabriel Leonardo Nogueira, Rogerio Miranda Morais, Lucas Fugikawa-Santos, Keli Fabiana Seidel, Neri Alves
Summary: In this study, a transparent and printed ZnO-based electrolyte-gated transistor (EGT) using cellulose electrolyte was reported. It showed low-voltage operation, high on-state current, and high field-effect mobility. The device exhibited a multiparametric response as a UV sensor when exposed to different levels of UV irradiance.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Ceramics
Chen Xinli, Li Yan, Wang Weisheng, Shi Zhiwen, Zhu Liqiang
Summary: Mimicking brain perceptual processing and using biocompatible and biodegradable materials in neuromorphic devices are both important for the design of bionic intelligent systems. In this study, a gelatin/carboxylated chitosan composite electrolyte film was used as the gate dielectric in oxide neuromorphic transistors, successfully mimicking synaptic plasticity. A quantitative processing method for tactile recognition based on spike number dependent synaptic plasticity was proposed, and an artificial neural network achieved a recognition accuracy of over 90% for MNIST handwritten digits. The results show that the proposed GEL/C-CS gated neuromorphic device has promising application potential in the design of bionic intelligent systems and brain-inspired neuromorphic systems.
JOURNAL OF INORGANIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Zhiming Yu, Xinpei Duan, Sen Zhang, Jun Lin, Wanhan Su, Guoli Li, Xingqiang Liu, Lei Liao
Summary: In this study, a dual-gated MoS2 transistor with an omega-shaped gate architecture based on silver nanowires as buried gate is fabricated. The transistor shows excellent electrical performance and gate control, leading to the successful fabrication of an inverter circuit and a NAND gate circuit with high voltage gain and noise margin.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Gabriel L. Nogueira, Douglas H. Vieira, Rogerio M. Morais, Jose P. M. Serbena, Keli F. Seidel, Neri Alves
Summary: This study presents an electrolyte-gated vertical field-effect transistor based on spray-deposited zinc oxide/silver nanowire Schottky contact, operating effectively at sub-1 V bias without being affected by the electrolyte or cyclic voltammetry. The device exhibits a high I-ON/I-OFF ratio, on-current density and normalized transconductance, positioning the ZnO-EGVFET structure at the forefront of printed transistor development without requiring high-resolution patterns.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Chemistry, Physical
Minho Yoon, Jiyoul Lee
Summary: This study demonstrates the enhanced channel modulation in ultrathin ZnO-based field-effect transistors (FETs) through dual-gate operation. The addition of a top Al2O3 layer to bottom-gate atomic-layer-deposited ZnO transistors leads to conductive transfer characteristics, attributed to Al2O3-induced hydrogen and aluminum doping effects. Dual-gate operation after the deposition of the top-gate electrode improves the performance of the FETs, significantly reducing off current and increasing field-effect mobility.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Haeyeon Lee, Minho Jin, Hyun-Jae Na, Changik Im, Jae Hak Lee, Jiyeon Kim, Yong Jun Gong, Chan Lee, Eungkyu Lee, Youn Sang Kim
Summary: This study proposes a water-in-bisalt/polymer electrolyte-gated synaptic transistor treated with ultraviolet ozone, which exhibits multiple synaptic functions and improved long-term plasticity. Surface engineering plays a crucial role in enhancing ion transport efficiency, and the trap sites generated by UV light and active oxygen during UVO treatment contribute to capturing lithium cations for better device performance.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Soo Yeong Hong, Sung Min Jee, Youngpyo Ko, Jinhan Cho, Keun Hyung Lee, Bongjun Yeom, Heesuk Kim, Jeong Gon Son
Summary: This research introduces a fully stretchable lithium-ion battery system with all components, including electrodes, current collectors, separators, and encapsulants, being intrinsically stretchable and printable. The stretchable electrode and current collectors are achieved through the use of a functionalized physically cross-linked organogel and nanocomposites with excellent barrier properties. Several types of stretchable lithium-ion batteries were successfully fabricated, exhibiting comparable performance to nonstretchable batteries under various stretch deformations.
Article
Polymer Science
Han-Hyeong Choi, Hyun Jin Kim, Jinwoo Oh, Minsung Kim, Youngjin Kim, Jae Young Jho, Keun Hyung Lee, Jeong Gon Son, Jong Hyuk Park
Summary: An effective and simple approach for fabricating complementary resistive switching (CRS) memory devices using self-assembled block copolymer micelles is reported. This approach can reduce sneak currents and achieve position selectivity during resistive switching.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Seonjeong Lee, Won Seok Cho, Jae Yong Park, Han Ju Lee, Jong-Lam Lee, Keun Hyung Lee, Kihyon Hong
Summary: This study demonstrates a new concept of device architecture for fabricating fibrous light-emitting devices using an electrochemiluminescence (ECL) material. Instead of conventional semiconductor materials, a solid-state ECL electrolyte gel is employed as the light-emitting layer. The resulting fiber devices show reliable operation and outstanding water resistance. The simple structure of these fiber devices also allows them to easily be woven together with commercial knitwear.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Min Seok Kang, Incheol Heo, Kyung Gook Cho, Hyuna Kyung, Hee Soo Kim, Keun Hyung Lee, Won Cheol Yoo
Summary: Carbonaceous materials with superior features, such as light weight, high electrical conductivity, and specific surface area (SSA), have attracted extensive attention as electrode materials for electrochemical energy storage systems. In this study, we demonstrate the fabrication of hierarchically interconnected large pore carbonaceous materials with ultrahigh SSA through the infiltration of polymer into metal-organic frameworks (MOFs). These materials show promising performance in both ultrahigh-energy-density supercapacitors and stretchable all-solid-state supercapacitors.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Dae Hyun Cho, Kyung Gook Cho, Sol An, Min Su Kim, Hye Won Oh, Jiyeong Yeo, Won Cheol Yoo, Kihyon Hong, Myungwoong Kim, Keun Hyung Lee
Summary: In this study, highly conductive, stretchable, transparent, and self-healing ionogels were developed and successfully applied in stretchable strain sensors and solid-state supercapacitors. The ionogels exhibited excellent self-healing properties, recovering their performance even after repetitive cutting and healing cycles, offering a promising solution for high-performance stretchable and wearable electronic/electrochemical devices.
ENERGY STORAGE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yeonbae Lee, Minjun Kim, Heein Kim, Keun Hyung Lee, Sangwon Kim
Summary: The development of reversible nanostructural associations in graft copolymer architecture has enabled the fabrication of tough polymer electrolyte composites that exhibit autonomous self-healing properties at room temperature. Random copolymers were used to form network structures, achieving remarkable mechanical properties and enabling its application in strain sensors.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Kyung Gook Cho, Kyoung Hwan Seol, Min Su Kim, Kihyon Hong, Keun Hyung Lee
Summary: In this study, a simple strategy for systematically tuning the threshold voltage of electrolyte-gated transistors (EGTs) was presented. By controlling the electrochemical doping of electrolyte ions, the threshold voltage and other transistor characteristics can be precisely controlled. This study opens a route for controlling the device characteristics of ionogel-based electronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Sojeong Kim, Won Bo Lee, Nicolas R. de Souza, Soo-Hyung Choi
Summary: The segmental dynamics of complex coacervates were studied using quasi-elastic neutron scattering. It was found that the number of mobile chain segments and their dynamics increase with salt concentration in ammonium-based coacervates, whereas guanidinium-based coacervates show slow and comparable segmental relaxation regardless of salt concentration, possibly due to non-electrostatic interactions. The combination of chemical structure, salt concentration, and temperature plays a significant role in determining polymer chain dynamics influenced by the strength of ionic bonding.
Article
Engineering, Chemical
John Kwame Bediako, Che-Ryong Lim, Eveliina Repo, Soo-Hyung Choi, Yeoung-Sang Yun
Summary: In this study, polyelectrolyte complex capsules were fabricated via salt-induced coacervation and showed selective adsorption of Au(III) in multimetal mixtures. The binding sites were determined to be provided by R4N+ through electrostatic attraction, as confirmed by XPS analysis. The selectivity was influenced by concentration, contact time, and stirring speed. A new phenomenon of competing ion rejection was observed due to combined Au(III)/water penetration into the capsules, resulting in a decrease in bulk solution volume at equilibrium. The maximum Au(III) uptake was found to be 176.63 +/- 15.57 mg/g and 110.84 +/- 2.32 mg/g for the Au-Pt-Pd and Au-Cu-Co-Zn systems, respectively, achievable within 1 hour and > 6 hours. The loaded Au(III) was successfully eluted with 0.1 M thiourea and the capsules were regenerated for at least five cycles, demonstrating practical feasibility for resource recovery through urban mining.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Seonjeong Lee, Won Seok Cho, Kyung Gook Cho, Jong-Lam Lee, Keun Hyung Lee, Kihyon Hong
Summary: The development of display textiles has great potential for sensor technology, healthcare, and communication due to their advantages over traditional rigid devices. We introduced fibrous modules that can be assembled like LEGO blocks to create textile displays. By using modular electrochemiluminescent fibers, light-emitting pixels can be generated through simple physical contact, without the need for pressure or heating. This technique offers various options for designing the geometries of light-emitting pixels and can be applied to different electronic and optical textile applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Seungjun Kim, Jiyeong Yeo, Su Jung Kim, Soeun Park, Kyung Gook Cho, Keewook Paeng, Keun Hyung Lee, Myungwoong Kim
Summary: Photocrosslinkable solid polymer ionogel electrolytes were successfully synthesized using thiol-containing 4-arm poly(ethylene glycol) and a dimethacrylate crosslinker with a disulfide bond. The resulting ionogels exhibited optical transparency, ionic conductivity, stretchability, and patternability. The presence of disulfide bonds allowed the ionogels to self-heal under mild conditions.
ORGANIC ELECTRONICS
(2023)
Article
Polymer Science
Tae-Young Heo, Debra J. Audus, Soo-Hyung Choi
Summary: The scaling relationship of complex coacervate core micelles (C3Ms) has been investigated both experimentally and theoretically. The micellar structure parameters, including core radius, total radius, corona thickness, and aggregation number, have been determined in relation to the core block length. A scaling theory has been proposed, which explains the formation of four different regimes based on the conformations of the core and corona chains. Experimental results confirm that the structure of our C3Ms is consistent with that of the crew-cut I regime.
Article
Nanoscience & Nanotechnology
Seonjeong Lee, Won Seok Cho, Kyung Gook Cho, Jong-Lam Lee, Keun Hyung Lee, Kihyon Hong
Summary: Display textiles have great potential in various fields due to their advantages over classical rigid devices. However, it is challenging to continuously weave functional fibers with light-emitting devices using conventional textile technologies. To address this issue, we introduced fibrous modules that can be assembled like LEGO blocks to realize textile displays. The unique feature of this work is the generation of light-emitting pixels through the simple contact between modular electrochemiluminescent fibers.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Seyoung Kim, Jung-Min Kim, Kathleen Wood, Soo-Hyung Choi
Summary: This study investigated the nanostructure of complex coacervate core hydrogels with varying compositions of cationic charged groups using small-angle X-ray/neutron scattering. The results showed that as the fraction of cationic end-block groups increased, the polymer volume fraction in the cores, interfacial tension, and salt resistance also increased.
Article
Materials Science, Multidisciplinary
Han Ju Lee, Seonjeong Lee, Keun Hyung Lee, Kihyon Hong
Summary: This research demonstrates a new high-performance solution-processed p-channel thin-film transistor using an amorphous copper iodide (a-CuI) semiconductor, which outperforms its polycrystalline counterpart. This paves the way for the application of amorphous p-type inorganic materials in high-performance complementary circuits.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Jinfei Dai, Chenjing Zhao, Jie Xu, Hossein Roshan, Hua Dong, Francesco Di Stasio, Fang Yuan, Bo Jiao, Zhaoxin Wu
Summary: In this study, the performance of perovskite nanocrystal light emitting diodes (PNC-LEDs) was enhanced through rational device structure design and the application of high-performance perovskite nanocrystal emitting layers.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Jia-Hua Yeh, Suhendro Purbo Prakoso, Leon Lukhas Santoso, Shi-Ju Chen, Bryan Chiang, Ju-Chieh Cheng, Ru-Ning Zhang, Yu-Cheng Chiu
Summary: This study demonstrates the application of a renewable material called dextrin-SMS in the production of electret filters and transistor memory. Dextrin-SMS material can maintain prolonged electrostatic charges and has a relatively wide memory window, making it suitable for the production of biodegradable face masks and green electronics.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Ahmad Telfah, Qais M. Al-Bataineh, Ahmad A. Ahmad, Rund Abu-Zurayk, Carlos J. Tavares, Johannes Etzkorn, Farzad Foadian
Summary: Polyacrylic acid complexed with polyaniline (PAA/PANI) composite materials have the potential to form organic mixed ion-electron conductive (OMIEC) films, which can be used in optoelectronic and energy storage applications. The composite films are formed through an acid-base reaction, resulting in strong electrostatic interactions and intermolecular hydrogen bonds between PANI and PAA. The separation of PANI-rich domains from PAA-rich matrix in the composite films is observed. The electrical conductivity of the composite films is higher when the content of PANI is 33 wt%, due to the high ionic-electronic coupling at the interface between phase-separated regions.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Min-Chih Hou, Dian Luo, Yu-Ting Huang, Shun-Wei Liu, Chin-Wei Lu, Chih-Hao Chang, Hai-Ching Su
Summary: Light-emitting electrochemical cells (LECs) have great potential for novel emission applications, but their relatively low device efficiency hinders their competitiveness with other emission technologies. A study finds that increasing the concentration of small TiO2 nano-particles in the diffuser film can enhance light extraction and improve the device efficiency of LECs.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Qiaoli Niu, Yao Xu, Jun Yang, Wei Hua, Baoxiang Chai, Zequan Zhang, Yuhui Ma, Wenjin Zeng, Ana Flavia Nogueira, Ruidong Xia
Summary: By introducing CPB as a defect passivation agent in the perovskite precursor solution, the optoelectronic properties of perovskite films can be significantly improved and non-radiative carrier recombination can be effectively suppressed. CPB-modified perovskite solar cells exhibit lower trap-state density and stronger carrier migration capability, leading to enhanced power conversion efficiency and stability.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Hulya Ozturk Dogan, Fatma Yildirim, Zeynep Orhan, Ali Ben Ahmed, Mostefa Benhaliliba, Sakir Aydogan
Summary: In this study, efficient self-powered visible and UV photodetectors based on hybrid organic-inorganic materials were demonstrated. The photodetectors showed excellent UV detecting capability and good photoresponsivity.
ORGANIC ELECTRONICS
(2024)