Article
Engineering, Electrical & Electronic
Federica Catania, Mukhtar Ahmad, Dianne Corsino, Niloofar Saeedzadeh Khaanghah, Luisa Petti, Niko Munzenrieder, Giuseppe Cantarella
Summary: This study presents the fabrication and performance evaluation of flexible transparent transistors and circuits. The experimental results indicate that these transistors exhibit excellent performance and functionality, even when bent to small radii.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Nanoscience & Nanotechnology
Li Ding, Pushkaraj Joshi, James Macdonald, Virendra Parab, Sanjiv Sambandan
Summary: This study demonstrates self-healing interconnects in thin-film transistor circuits on flexible substrates, achieving the restoration of over 99% of prefault current. The active material and recovery mechanism are discussed in detail, setting a new benchmark for reliable inkjet-printed thin-film transistor circuits on flexible substrates.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Chaoqi Dai, Peiqin Chen, Shaocheng Qi, Yongbin Hu, Zhitang Song, Mingzhi Dai
Summary: This study proposes a flexible transistor with ultra-thin IGZO as the channel material, which can achieve a highly efficient circuit architecture and combine the functions of logic gates, memory, and sensors into a single cell. The transistor can implement typical logic gate functions, demonstrate memory effects with programming times as low as 5 ns, and display various artificial synaptic behaviors.
Article
Engineering, Electrical & Electronic
Jusin Lee, Min Jae Kim, Heewon Yang, Sunjin Kim, Seongoh Yeom, Gunwoo Ryu, Yoonsoo Shin, Onejae Sul, Jae Kyeong Jeong, Seung-Beck Lee
Summary: In this study, a stable and sensitive biochemical sensor based on amorphous indium-gallium-zinc-oxide (a-IGZO) thin-film transistors (TFTs) with a versatile extended-gate electrode was reported. The sensor demonstrated high sensitivity and specificity for protein detection, and could be potentially used for future multifunctional biomolecular sensing and analysis.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Yuhang Guan, Yuqing Zhang, Jinxiong Li, Jiye Li, Yuhan Zhang, Zhenhui Wang, Yuancan Ding, Mansun Chan, Xinwei Wang, Lei Lu, Shengdong Zhang
Summary: In recent years, high-k gate dielectrics have received increasing attention in amorphous oxide semiconductor (AOS) thin-film transistors (TFTs) due to the need for stronger gate controllability. This study developed an ultra-thin top-gate insulator of atomic-layer-deposited (ALD) HfOx for amorphous indium-gallium-zinc oxide (a-IGZO) TFTs. However, the reliability of the 4-nm HfOx-gated a-IGZO transistor is poor due to interface defects caused by the interface reaction between HfOx and a-IGZO during the ALD process. To improve stability, the a-IGZO channel is pre-treated with strong oxidizing plasma. However, further reducing HfOx thickness increases gate leakage current.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Shinyoung Park, Jun Tae Jang, Yeongjin Hwang, Hyunkyu Lee, Woo Sik Choi, Dongyeon Kang, Changwook Kim, Hyungjin Kim, Dae Hwan Kim
Summary: Flexible IGZO synaptic TFTs with different gate dielectric layers were fabricated and analyzed to investigate the effect of the gate insulator on weight window and retention characteristics. The weight modulation can be controlled by gate bias, and its impact on pattern recognition accuracy in a neural network was studied.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jinbaek Bae, Arqum Ali, Md Mobaidul Islam, Myeonggi Jeong, Chanju Park, Jin Jang
Summary: This study reports the development of low-cost, high-stability oxide thin-film transistors (TFTs) using spray pyrolysis to produce highly oriented InGaZnO crystals with minimal oxygen vacancies. Through plasma doping, the resistivity of the crystals can be reduced, enabling high-performance coplanar TFTs. The results demonstrate the potential of as-grown c-IGZO as a new oxide semiconductor for low-cost, flexible TFT electronics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Crystallography
Haotian Ye, Kuibo Lan, Zhenqiang Ma, Guoxuan Qin
Summary: In this study, a flexible silicon thin-film transistor (TFT) on a plastic substrate was fabricated to analyze the major influencing factors of flexible devices under bending conditions. Experimental and modeling results showed that the bending radius and device dimensions significantly affected the radio-frequency (RF) performance of the flexible TFT. The carrier mobility and electric field increased with larger bending strains, leading to better RF performance.
Article
Engineering, Electrical & Electronic
Niloofar Saeedzadeh Khaanghah, Dianne Corsino, Federica Catania, Julio Costa, Giuseppe Cantarella, Niko Munzenrieder
Summary: The AC performance of flexible TFTs is affected by the parasitics caused by tolerances needed for the fabrication on free-standing plastic foils. The width of the semiconductor island can either be wider or narrower than the source/drain contacts. It is shown that flexible InGaZnO TFTs with wider semiconductor islands exhibit better frequency performance due to current spreading and the frequency dependency of the gate capacitance.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jinbaek Bae, Arqum Ali, Jin Jang
Summary: Spray-pyrolyzed amorphous indium-gallium-zinc oxide (a-IGZO) thin-film transistor (TFT) with self-aligned (SA) coplanar structure exhibits excellent performance and stability, making it a promising metal oxide semiconductor for high-performance TFT backplanes.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Yining Yu, Nannan Lv, Dongli Zhang, Yiran Wei, Mingxiang Wang
Summary: The letter discusses how the carrier mobility of amorphous InGaZnO thin-film transistors was enhanced by introducing nitrogen and forming Zn3N2, with a saturation field-effect mobility of 61.6 cm(2)/Vs. However, annealing at 400 degrees C led to a decrease in mobility to 4.1 cm(2)/Vs due to the formation of defective ZnxNy. Additionally, the enhanced mobility of a-IGZO TFTs did not exhibit persistent photoconductivity behavior, making them suitable for functional circuits in active-matrix displays.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Jiaqi Song, Xiaodong Huang, Chuanyu Han, Yongqin Yu, Yantao Su, Puito Lai
Summary: The paragraph discusses the research status, manufacturing process, performance improvement methods, recent advances, and challenges of flexible InGaZnO thin-film transistors.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Qing Li, Czang-Ho Lee, Mohsen Asad, William S. Wong, Manoj Sachdev
Summary: The article proposes new logic gate designs to alleviate implementation issues in thin-film transistor technology, demonstrating the fabrication of a three-to-eight decoder and a column of pixel circuits on flexible plastic substrates, with simulation and measurement results showing improved performance compared to conventional implementations.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2021)
Article
Chemistry, Physical
Md Mehedi Hasan, Samiran Roy, Eisuke Tokumitsu, Hye-Yong Chu, Sung Chul Kim, Jin Jang
Summary: By employing one-step annealing, we successfully induced ferroelectricity in spray coated ZrO2 with sputtered amorphous InGaZnO (a-IGZO) capping layer, achieving a large memory window of 1.5 V, high I-ON/I-OFF ratio of 1 x 10(7), and steep subthreshold swing (SS) of 0.12 V/decade. The low thermal expansion coefficient of a-IGZO helped induce the polar orthorhombic phase in the underlying ZrO2 layer by providing suitable mechanical stress. This work provides a new approach for inducing ferroelectricity in ZrO2 for high performance ferroelectric thin film transistors.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Hong Hu, Xuyun Guo, Yaokang Zhang, Zijian Chen, Lei Wang, Yuan Gao, Ziran Wang, Yuqi Zhang, Wenshuo Wang, Mingming Rong, Guoqiang Liu, Qiyao Huang, Ye Zhu, Zijian Zheng
Summary: A strategy called elasto-plastic design of an ultrathin interlayer is proposed to enhance the strain tolerance of flexible electronics. By inserting an ultrathin, stiff, and elastic interlayer between a rigid film/device and a soft substrate, the actual strain applied on the film/device can be significantly reduced when the substrate is bent.
Review
Materials Science, Multidisciplinary
Christabel Choi, Shubhi Bansal, Niko Munzenrieder, Sriram Subramanian
Summary: Acoustic metamaterials and phononic crystals have the potential to revolutionize human interactions and sensory communications. Understanding the fundamental theory and design principles alone is not enough; physical realization of these structures through fabrication and assembly is equally important. The paper critically examines fabrication and assembly approaches, addressing crucial parameters for efficient structural implementation. Various assembly techniques are proposed, uncovering innovative designs and supporting a fresh paradigm for innovation.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Pasindu Lugoda, Julio C. Costa, Leonardo A. Garcia-Garcia, Arash Pouryazdan, Zygimantas Jocys, Filippo Spina, Jonathan Salvage, Daniel Roggen, Niko Munzenrieder
Summary: This study presents a biocompatible and inexpensive strain sensor filled with natural coconut oil and carbon black. The sensor has a high gauge factor and a porous morphology filled with an oily suspension. Results show that the liquid filled porous structure can improve the reliability of resistive strain sensors compared to sensors fabricated using non-polar solvents.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Physics, Applied
Arash Pouryazdan, Robert J. Prance, Helen Prance, Julio C. Costa, Niko Munzenrieder
Summary: Conductivity is a fundamental property of materials, and precise quantification of electrical sheet resistance is crucial for the development of electronic thin-film devices. This study introduces an alternative technique based on the attenuation of low frequency electric fields to quantify the conductivity variation in a flexible indium-gallium-zinc-oxide semiconductor film, showing a high degree of correlation with conventional DC measurements.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Arash Pouryazdan, Alio C. Costa, Leonardo Garcia-Garcia, Pasindu Lugoda, Robert J. Prance, Helen Prance, Niko Munzenrieder
Summary: This study introduces a novel design of a flexible array of electric potential probes, which can improve scanning speed and provide higher spatial resolution by combining flexible thin-film probes with advanced discrete conditioning circuits. This method can be used for fingerprint imaging, obtaining the surface topography of conductive samples, and visualizing local dielectric variations.
IEEE SENSORS JOURNAL
(2021)
Article
Pharmacology & Pharmacy
Deck Khong Tan, Niko Munzenrieder, Mohammed Maniruzzaman, Ali Nokhodchi
Summary: Low-cost biocompatible filaments suitable for FDM 3D printing were successfully produced using single-screw and twin-screw hot melt extrusion techniques. The addition of PEG can lower the melting point of PLA polymer, improve filament plasticity, and enhance its potential for medical and pharmaceutical applications.
CURRENT DRUG DELIVERY
(2021)
Review
Physics, Applied
Federica Catania, Hugo de Souza Oliveira, Pasindu Lugoda, Giuseppe Cantarella, Niko Munzenrieder
Summary: The development of new materials and advanced fabrication techniques has allowed electronics to transform from bulky rigid structures to unobtrusive soft systems, leading to the realization of new thin-film devices on unconventional substrates. These innovations have enabled the creation of smart structures for tasks beyond the capabilities of traditional electronics or substrates.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Federica Catania, Mukhtar Ahmad, Dianne Corsino, Niloofar Saeedzadeh Khaanghah, Luisa Petti, Niko Munzenrieder, Giuseppe Cantarella
Summary: This study presents the fabrication and performance evaluation of flexible transparent transistors and circuits. The experimental results indicate that these transistors exhibit excellent performance and functionality, even when bent to small radii.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Niloofar Saeedzadeh Khaanghah, Dianne Corsino, Federica Catania, Julio Costa, Giuseppe Cantarella, Niko Munzenrieder
Summary: The AC performance of flexible TFTs is affected by the parasitics caused by tolerances needed for the fabrication on free-standing plastic foils. The width of the semiconductor island can either be wider or narrower than the source/drain contacts. It is shown that flexible InGaZnO TFTs with wider semiconductor islands exhibit better frequency performance due to current spreading and the frequency dependency of the gate capacitance.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Hugo De Souza Oliveira, Federica Catania, Albert Heinrich Lanthaler, Alejandro Carrasco-Pena, Giuseppe Cantarella, Niko Munzenrieder
Summary: Innovation in materials and technologies have allowed the fabrication of thin-film electronics on previously incompatible substrates. Transfer techniques using supportive carriers in the electronics stack have been developed to mitigate potential damages caused by conventional fabrication processes. A substrate-free approach for the transfer of ultra-thin electronics has been presented, enabling the development of ultra-thin devices on unconventional surfaces.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Hugo de Souza Oliveira, Niloofar Saeedzadeh Khaanghah, Violet Yinuo Han, Alejandro Carrasco-Pena, Alexandra Ion, Michael Haller, Giuseppe Cantarella, Niko Munzenrieder
Summary: Sensors and electronics have attracted considerable attention recently due to their ability to conform to surfaces while retaining functionality. This study presents a lightweight and permeable flexible sensor using melamine foam as a substrate, coated with metallic copper (Cu) and semiconductive Indium-Gallium-Zinc-Oxide (InGaZnO). The sensor demonstrated stable response to temperature cycling, with maximum sensitivity, permeability, and resistance variation. It also remained fully functional after being bent to a 5 mm radius.
IEEE SENSORS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Niloofar Saeedzadeh Khaanghah, Hugo de Souza Oliveira, Raheel Riaz, Federica Catania, Martina Aurora Costa Angeli, Luisa Petti, Giuseppe Cantarella, Niko Munzenrieder
Summary: The recent interest in flexible and stretchable strain sensors is due to their potential applications in various fields, such as healthcare monitoring, soft robotics, and electronic skins. Self-healability is also an important property of stretchable strain sensors, as it increases their lifespan and reduces electronic waste and cost.
IEEE SENSORS LETTERS
(2023)
Proceedings Paper
Computer Science, Theory & Methods
Leonardo A. Garcia-Garcia, George Valsamakis, Niko Munzenrieder, Daniel Roggen
Summary: This paper investigates the feasibility of using smart textile sleeves for capturing body shapes and designing orthoses, as well as introducing technological innovations and methods developed during the development process.
PERVASIVE COMPUTING TECHNOLOGIES FOR HEALTHCARE, PERVASIVE HEALTH 2021
(2022)
Proceedings Paper
Metallurgy & Metallurgical Engineering
Niko Munzenrieder, Giuseppe Cantarella, Luisa Petti, Julio Costa
Summary: Unobtrusive magneto-reception can be used in various scenarios, such as human-computer interaction and controlled movement of micro-robots. Innovations in bio-compatible magnetic sensor systems are essential for achieving excellent performance in diverse applications. The integration of magnetic sensors with flexible oxide conditioning circuits on large-area substrates is crucial for enhancing the performance of magnetic sensor systems.
TMS 2021 150TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Leonardo A. Garcia-Garcia, Julio C. Costa, Pasindu Lugoda, Daniel Roggen, Niko Munzenrieder
Article
Engineering, Electrical & Electronic
Julio Cesar Costa, Arash Pour Yazdan Panah Kermani, Giuseppe Cantarella, Luisa Petti, Christian Vogt, Alwin Daus, Stefan Knobelspies, Gerhard Troster, Niko S. Munzenrieder
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2020)