Article
Materials Science, Multidisciplinary
Kaibin Wu, Jisu Hong, Xue Qi, Heqing Ye, Zhijun Li, Chenhao Cong, Jian Liu, Xi Li, Ka Yeon Ryu, Sang Yong Nam, Xinlin Li, Sooman Lim, Se Hyun Kim
Summary: In this study, the screen printing of Ag nanoparticle inks for the electrodes of organic thin-film transistors (OTFTs) was systematically investigated. The printing process conditions and substrate surface modification were controlled to optimize the printing process. The resulting Ag nanoparticle electrodes showed high electrical conductivity, pattern-fidelity, and adhesion to the substrate. OTFTs with different device structures were fabricated using the optimized Ag nanoparticle electrodes, and the best device performance was achieved on Si/SiO2 substrates with a bottom-gate, bottom-contact (BGBC) structure.
ORGANIC ELECTRONICS
(2022)
Review
Materials Science, Multidisciplinary
Shuming Duan, Bowen Geng, Xiaotao Zhang, Xiaochen Ren, Wenping Hu
Summary: The major advantages of organic electronics lie in their solution processability and unique optoelectronic performance. Utilizing a solution-based method to fabricate single-crystal organic devices and circuits is crucial for the development of organic electronics, but remains challenging. The progress in organic crystal fabrication, patterning, and high-resolution printed contacts for organic field-effect transistors (OFETs) is summarized, with suggested future research directions in this field.
Article
Chemistry, Multidisciplinary
Shuyue Wang, Xiaoli Wu, Jiaxin Lu, Zhengwu Luo, Hui Xie, Xiaobin Zhang, Kaiwen Lin, Yuehui Wang
Summary: This study proposes a high concentration silver nanowires (AgNWs) conductive ink for inkjet printing, which enables the fabrication of flexible transparent conductive electrodes with low resistance and high transparency. The relationship between the printing layer and the conductivity, as well as the stability and thermal response of the electrode, are investigated. The results demonstrate the potential of inkjet-printed AgNWs-based flexible transparent conductive electrodes for developing flexible functional electronics.
Article
Chemistry, Multidisciplinary
Francesca Scuratti, Jorge Mario Salazar-Rios, Alessandro Luzio, Sebastian Kowalski, Sybille Allard, Stefan Jung, Ullrich Scherf, Maria Antonietta Loi, Mario Caironi
Summary: When a higher proportion of nanotubes with smaller bandgaps are efficiently connected, a sparse network allows for efficient charge percolation for band-like transport, achieving a charge mobility as high as 20.2 cm(2) V-1 s(-1). However, if charges are forced to populate higher bandgap nanotubes and/or the wrapping polymer by a less efficient morphology, thermally activated transport occurs and mobility decreases.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yiyang Gao, Chengbin Kang, Maksym F. Prodanov, Valerii V. Vashchenko, Abhishek K. Srivastava
Summary: Photoluminescence-type color filters (PLCFs) fabricated on a porous polymer film (PF) using inkjet printing (IJP) exhibit high-quality color patterns, good photoluminescence stability, and flexibility, making them suitable for flexible displays and photonics components.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Tanyaradzwa N. Mangoma, Shunsuke Yamamoto, George G. Malliaras, Ronan Daly
Summary: Organic electrochemical transistors (OECTs) are essential in bioelectronics and printed electronics applications due to their simple structure, ease of tunability, biocompatibility, and suitability for different fabrication routes. This study presents a hybrid direct-write additive manufacturing approach to fabricating OECTs, combining 3D printing of conducting and insulating layers with inkjet printing of semiconducting thin films. The results demonstrate that this manufacturing method can rapidly produce OECTs and neuromorphic devices with good performance.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
R. Madhavan
Summary: This work presents Silver nanowires (AgNWs)/Ecoflex based composite strain sensors fabricated via inkjet printing technique, which exhibit high sensitivity, a broad strain sensing range, excellent stability and reliability, and low monitoring limit. It provides a new approach for fabricating strain sensors for wearable electronics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Seongdae Choi, Seunghwan Lee, Byeongmoon Lee, Jinsu Yoon, Chea-young Lee, Taehoon Kim, Yongtaek Hong
Summary: In this paper, inkjet-printed silver thin films with crack-inducing underlayers were reported to enhance the sensitivity of resistance changes under deformation. The highly sensitive strain sensors can detect weak vertical forces even through thick plates, such as polyethylene terephthalate or glass. These sensors can potentially solve the accuracy issue of wearable devices by accurately detecting biosignals such as heart rate and blood pressure even when off-centered from the artery.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Sandeep K. Mondal, Ananya Biswas, Jyoti R. Pradhan, Subho Dasgupta
Summary: The study introduces fully printed and electrolyte-gated narrow-channel MoS2 field-effect transistors in two-dimensional semiconductor electronics, which overcomes transport limitations by printing an additional metal layer onto the 2D-TMD nanosheet channel and achieves predominant intraflake transport. Additionally, a channel-capacitance-modulation induced subthermionic transport with a subthreshold slope value as low as 7.5 mV dec(-1) is recorded in the study.
Article
Engineering, Electrical & Electronic
Somi Kim, Seoyeon Jung, Bongjun Kim, Hocheon Yoo
Summary: This work proposes a pre-state-dependent ternary and binary logic inverter using a single-walled carbon nanotube (SWCNT)/indium oxide (InO) heterojunction field-effect transistor (H-FET) formed by inkjet printing. The proposed device has a logic-in-memory characteristic that operates in either ternary or binary mode depending on the previous output voltage state. The device exhibits previous state dependent ternary/binary operations even after 4 days of exposure under ambient conditions and with 90 s of constant supply of bias stress.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Luis Portilla, Kalaivanan Loganathan, Hendrik Faber, Aline Eid, Jimmy G. D. Hester, Manos M. Tentzeris, Marco Fattori, Eugenio Cantatore, Chen Jiang, Arokia Nathan, Gianluca Fiori, Taofeeq Ibn-Mohammed, Thomas D. Anthopoulos, Vincenzo Pecunia
Summary: Large-area electronics technology can provide a solution for powering the Internet of Things sensor nodes wirelessly. This technology is based on organic semiconductors, amorphous metal oxide semiconductors, semiconducting carbon nanotubes, and two-dimensional semiconductors. System-level analysis of wirelessly powered sensor nodes is conducted, identifying constraints and highlighting potential architectures and design approaches. The use of large-area electronics technology in wirelessly powered Internet of Things sensor nodes is explored, focusing on low-power transistor circuits for digital processing and signal amplification, as well as high-speed diodes and printed antennas for data communication and radiofrequency energy harvesting.
NATURE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Irena Ivanisevic, Marin Kovacic, Marko Zubak, Antonia Ressler, Sara Krivacic, Zvonimir Katancic, Iva Gudan Pavlovic, Petar Kassal
Summary: This work demonstrates the development of a silver nanoparticle-based functional ink for printing on flexible paper and plastic substrates. By improving the wetting properties of the silver nanoparticles, stable printing on different surfaces was achieved, followed by sintering using intense pulsed light. The silver nanoparticle ink shows great potential in the field of flexible electronics.
Article
Chemistry, Analytical
Buesra Karas, Vimanyu Beedasy, Zhaoyuan Leong, Nicola A. Morley, Kamran Mumtaz, Patrick J. Smith
Summary: Inkjet-printing technology allows contactless deposition of functional materials and can be used for printed electronics and manufacturing sensors. By printing silver nanoparticle strain sensors using inkjet technology, optimized conductive and adhesive performance can be achieved, eliminating the use of interfacial adhesives and potential failure due to delamination.
Article
Engineering, Environmental
Guanguang Zhang, Jianhua Zhang, Tian Qiu, Honglong Ning, Zhiqiang Fang, Jinyao Zhong, Yuexin Yang, Rihui Yao, Dongxiang Luo, Junbiao Peng
Summary: A crystallization kinetic-controlled strategy was suggested to form high-quality amorphous isopolytungstate (IPT) film, which showed advantages in electrochromic properties, morphology, and stability. This method facilitated the dissociation of metatungstate clusters into tiny tungstate monomers, inhibiting crystallization nucleation and promoting excellent performance of amorphous IPT film.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemical Research Methods
He Wang, Liguo Chen
Summary: Flexible printed electronic technology enables low-cost fabrication of digital microfluidic chips, with inkjet printing on flexible substrates being a cost-effective method. The surface quality, conductivity, and resolution of silver lines on two types of flexible DMF chips were comprehensively analyzed. Droplet motion between closed and open regions was studied, and experiments showed that the performance of droplets can be comparable to traditional technology.
IEEE TRANSACTIONS ON NANOBIOSCIENCE
(2022)
Article
Multidisciplinary Sciences
Zhi Jiang, Fanji Wang, Kenjiro Fukuda, Akchheta Karki, Wenchao Huang, Kilho Yu, Tomoyuki Yokota, Keisuke Tajima, Thuc-Quyen Nguyen, Takao Someya
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
Review
Chemistry, Physical
Kenjiro Fukuda, Kilho Yu, Takao Someya
ADVANCED ENERGY MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Zhi Jiang, Kilho Yu, Haoyang Wang, Steven Rich, Tomoyuki Yokota, Kenjiro Fukuda, Takao Someya
Summary: An integrated flexible photodetector with FET and OPD modules achieves ultralow dark current density and ultrahigh detectivity, amplifying the photoplethysmogram signal intensity from the OPD module by a factor of approximately 10.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Review
Chemistry, Multidisciplinary
Tomoyuki Yokota, Kenjiro Fukuda, Takao Someya
Summary: Flexible image sensors are gaining attention as new imaging devices due to their lightness, softness, and bendability. They offer high-accuracy continuous biometric information measurement directly attached to curved surfaces like skin, with potential applications in wearable devices and home medical care. The individual components, performance evaluation parameters, and real-world measurement cases of these sensors in the biomedical field are discussed.
ADVANCED MATERIALS
(2021)
Article
Multidisciplinary Sciences
Hiroaki Jinno, Tomoyuki Yokota, Mari Koizumi, Wakako Yukita, Masahiko Saito, Itaru Osaka, Kenjiro Fukuda, Takao Someya
Summary: The integration of ultraflexible optical sensors with power sources faces challenges due to the insufficient air operational stability of polymer light-emitting diodes. However, by combining air-operation-stable polymer light-emitting diodes, organic solar cells, and organic photodetectors, a self-powered organic optical system for photoplethysmogram monitoring has been developed. This system demonstrates high linearity and stability, making it suitable for long-term health monitoring applications.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Basanagouda B. Patil, Yasunori Takeda, Subhash Singh, Amandeep Singh, Thu Trang Do, Kostya (Ken) Ostrikov, Samarendra P. Singh, Shizuo Tokito, Ajay K. Pandey, Prashant Sonar
Summary: This study advances interface engineering in organic transistors by using specific structured polymer materials and Cytop as the dielectric material. Modulating the performance of dual-gate transistors using Cytop opens new research avenues towards enhancing the stability of such transistors for real-world applications.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Physics, Applied
Keita Ito, Tomohito Sekine, Yoshinori Shouji, Yi-Fei Wang, Yasunori Takeda, Daisuke Kumaki, Fabrice Domingues Dos Santos, Huang Tong, Atsushi Miyabo, Shizuo Tokito
Summary: Softening a ferroelectric polymer for wearable tactile electronics has been challenging due to its high robustness and crystallinity. In this study, a functional piezoelectric material system was created by optimizing the blend ratio of an amorphous polymer, PMMA-PBA, and a ferroelectric polymer, P(VDF-TrFE). The resulting stretchable film could be extended up to 400%. By fabricating a capacitor-type device combined with a conductive polymer, the potential for using it in a stretchable sensor was demonstrated.
APPLIED PHYSICS EXPRESS
(2023)
Article
Chemistry, Multidisciplinary
Yudai Hemmi, Yuji Ikeda, Radu A. Sporea, Yasunori Takeda, Shizuo Tokito, Hiroyuki Matsui
Summary: The first n-type printed organic SGTs with high gain and low power consumption have been developed, enabling the design of complementary circuits, which are promising for the development of flexible and wearable electronic devices.
Article
Physics, Applied
Masaya Yamada, Yasunori Takeda, Shizuo Tokito, Hiroyuki Matsui
Summary: We demonstrate printed organic Schottky diodes for rectifying the 13.56 MHz near-field communication carrier wave. The diodes utilize printed silver electrodes with a self-assembled monolayer of 4-methylbenzenethiol as the Schottky barrier. By optimizing the treatment of the self-assembled monolayer, rectification ratio of 10^6 and forward current density of 1 A cm(-2) were achieved. Finally, we demonstrated organic half-wave and full-wave rectifiers with a high-frequency response of output rectifying voltage exceeding 5 V at 13.56 MHz.
APPLIED PHYSICS EXPRESS
(2023)
Article
Chemistry, Analytical
Yi-Fei Wang, Ayako Yoshida, Yasunori Takeda, Tomohito Sekine, Daisuke Kumaki, Shizuo Tokito
Summary: We propose a high-performance flexible bending strain sensor for directional motion detection of human hands and soft robotic grippers. The sensor is fabricated using a printable porous conductive composite composed of polydimethylsiloxane (PDMS) and carbon black (CB). The utilization of a deep eutectic solvent (DES) induces phase segregation between CB and PDMS, resulting in a porous structure inside the printed films. This conductive architecture provides superior directional bend-sensing characteristics compared to conventional random composites. The flexible bending sensors show high bidirectional sensitivity, negligible hysteresis, good linearity, and excellent bending durability, making them suitable for various applications such as human motion detection, object-shape monitoring, and robotic perceptions.
Article
Materials Science, Multidisciplinary
Akihiro Maeda, Ruiyuan Liu, Kilho Yu, Shinyoung Lee, Kyohei Nakano, Masahito Takakuwa, Shipei Zhang, Keisuke Tajima, Kenjiro Fukuda, Shinjiro Umezu, Takao Someya
Summary: Recent progress in organic photovoltaics (OPVs) emphasizes the importance of laboratory-scale fabrication in ambient air using solution processes. However, the effect of the existence of both ambient air and light during the formation of a photoactive layer on the performance of fabricated devices has not been fully elucidated. It was found that photoactive layer formation in completely dark conditions enables air-processable OPVs with a high power conversion efficiency, highlighting the impact of light and air coexistence on device performance.
JOURNAL OF PHYSICS-MATERIALS
(2021)
Article
Biochemical Research Methods
Takashi Ohya, Haruki Ohtomo, Tetsutaro Kikuchi, Daisuke Sasaki, Yohei Kawamura, Katsuhisa Matsuura, Tatsuya Shimizu, Kenjiro Fukuda, Takao Someya, Shinjiro Umezu
Summary: Human induced pluripotent stem (iPS) cell-derived cardiomyocytes are widely used for in vitro pharmacological and pathological studies. A novel simultaneous measurement system using 500 nm-thick flexible electronic sheets was developed for contractile force and extracellular field potential assessment of iPS cell-derived cardiac cell sheet-tissues. It was confirmed that this system is applicable for pharmacological studies and assessments of excitation-contraction coupling-related parameters. Flexible electronics with cardiac tissue engineering provide an advanced platform for drug development and gaining new insight in pharmacological study of human cardiac function.
Review
Chemistry, Multidisciplinary
Steven I. Rich, Zhi Jiang, Kenjiro Fukuda, Takao Someya
Summary: With the advancement of the Internet of Things and wearable computing, electronics have become increasingly essential in daily life. Traditional electronics, with their rigid angular nature, have faced challenges in integrating with curved surfaces. In recent years, efforts have been made to fabricate electronics on curved surfaces, showing the potential of curved electronics.
MATERIALS HORIZONS
(2021)
Article
Materials Science, Multidisciplinary
Tsukuru Minamiki, Tsuyoshi Minami, Yi-Pu Chen, Taisei Mano, Yasunori Takeda, Kenjiro Fukuda, Shizuo Tokito
Summary: The integration of organic thin-film transistors and biosensors is promising for daily health management, with molecular recognition chemistry-based design crucial for obtaining accurate and reproducible sensing signals. These results offer guidelines for the development of effective healthcare tools.
COMMUNICATIONS MATERIALS
(2021)
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)
