Review
Chemistry, Multidisciplinary
Jiajun Song, Hong Liu, Zeyu Zhao, Peng Lin, Feng Yan
Summary: Flexible and stretchable biosensors are increasingly utilized for acquiring high-fidelity signals in emerging applications. Organic thin film transistors (OTFTs) are ideal candidates for flexible and stretchable biosensing due to their soft nature, amplification function, biocompatibility, functionalization ease, low cost, and device diversity. This review provides a comprehensive overview of the advancements in flexible-OTFT-based biosensors, discussing their features, functionalization strategies, applications in wearable, implantable, and portable electronics, as well as neuromorphic biointerfaces. Special attention is given to emerging stretchable organic transistors and their engineering routes for achieving stretchability, along with their implementations in e-skin and smart textiles. The remaining challenges and future opportunities in this field are also summarized.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ping Ren, Runqiao Song, Yong Zhu, Brendan O'Connor, Jingyan Dong
Summary: The demand for cost-effective fabrication of printed flexible transistors has increased due to the need for flexible interface devices like e-skins, wearables, and medical patches. This study develops electrohydrodynamic printing processes to fabricate all components of polymer-based organic thin film transistors, streamlining the fabrication procedure. The fully EHD-printed OTFTs show good electrical performance and great mechanical flexibility, providing a cost-effective route for flexible electronics.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Li Xiang, Huaidong Ye, Hui Wang, Yuwei Wang
Summary: In this work, carbon nanotube (CNT) thin film transistors (TFTs) with excellent conformability to biological surfaces were realized, demonstrating good electrical properties and flexibility even after being deformed. A flexible amplifier constructed based on the CNT TFTs exhibited low voltage supply and wide bandwidth, providing important capabilities for future advanced biological or clinical applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
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)
Review
Engineering, Electrical & Electronic
Li-Ya Ma, Norhayati Soin, Siti Nabila Aidit, Fazliyatul Azwa Md Rezali, Sharifah Fatmadiana Wan Muhamad Hatta
Summary: This article comprehensively studies recent advancements in flexible solution-processed TFTs, focusing on their typical configurations, different active materials, biocompatible substrates, superior performance, and challenges, especially in the context of flexible wearable devices. The configurations of the flexible TFTs are classified and discussed along with their related features and applications. Different types of flexible and biocompatible substrates, solution-based semiconductors, gate dielectric, and conductors are reviewed in detail, highlighting their characteristics and latest publications. The methods used to assess the performance of flexible TFTs are also illustrated.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Jianxiong Zou, Mengyao Zhang, Keyang Zhao, Qia Zhang, Menghan Deng, Fanming Huang, Ling Kang, Zhigao Hu, Jian Zhang, Wenwu Li
Summary: A new methodology for fabricating Ag source/drain electrodes of flexible OTFTs arrays using chemical plating at room temperature has been proposed, showcasing improved electrical properties compared to conventional high-temperature evaporated method. The chemically plated electrodes demonstrate higher saturation mobility and reduced subthreshold swing, as well as smaller threshold voltage and contact resistance, contributing to stable electrical performance during bending tests. This approach holds great potential for flexible and wearable electronic devices.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Polymer Science
Zhengran He, Ziyang Zhang, Kyeiwaa Asare-Yeboah, Sheng Bi, Jihua Chen, Dawen Li
Summary: This study demonstrated the use of a metal-containing semicrystalline polymer as an additive to mediate the thin film morphology of solution-grown, small-molecule organic semiconductors, resulting in improved performance of organic thin film transistors.
Article
Chemistry, Multidisciplinary
Xingwei Ding, Bing Yang, Haiyang Xu, Jie Qi, Xifeng Li, Jianhua Zhang
Summary: UV treatment at room temperature was used to prepare high-quality IZO thin films for TFT fabrication. The structure of IZO thin films was gradually rearranged after UV treatment, resulting in good M-O-M network formation and bonds.
Article
Chemistry, Physical
Penghui Guo, Min Li, Shuangshuang Shao, Yuxiao Fang, Zheng Chen, Hongxuan Guo, Jianwen Zhao
Summary: This study achieved a reliable technique for manufacturing matched carbon nanotube thin-film transistors with low power consumption and mechanical flexibility, successfully addressing the leakage current issue in flexible electronic devices. Flexible printed CMOS circuits with high performance were constructed.
Article
Materials Science, Ceramics
Kwang Su Yoo, Dong-Gyu Kim, Seunghwan Lee, Won-Bum Lee, Jin-Seong Park
Summary: Atmospheric pressure spatial atomic layer deposition (AP S-ALD) derived Al2O3 films were investigated for their properties at different growth temperatures and applied in IGZO thin film transistor (TFT) fabrication. Increasing the growth temperature improved the growth per cycle, refractive index, and density of the Al2O3 films, reducing carbon impurities. The fabricated IGZO TFTs with Al2O3 layers exhibited excellent device performance and stability.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Huaidong Ye, Hui Wang, Xingge Yu, Ying Yao, Li Xiang
Summary: This article explores the influence of substrate roughness on the performance uniformity of carbon nanotube thin film transistors (CNT TFTs). By adopting a polyimide planarization layer to smooth the flexible substrate, highly uniform CNT deposition is achieved. The results show improved performance uniformity compared to previously reported flexible CNT TFTs. This approach promotes the uniformity of CNT TFTs on flexible substrates, enhancing the potential for practical applications in large-scale device integration.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Nanoscience & Nanotechnology
Rosemary R. Cranston, Mario C. Vebber, Jonatas Faleiro Berbigier, Nicole A. Rice, Claire Tonnele, Zachary J. Comeau, Nicholas T. Boileau, Jaclyn L. Brusso, Adam J. Shuhendler, Frederic Castet, Luca Muccioli, Timothy L. Kelly, Benoit H. Lessard
Summary: This study investigated eight axially substituted SiPcs and their application in solution-processed n-type OTFTs. It was found that the length of the alkyl chain affects device performance and thin-film morphology, and the effects of high-temperature annealing and spin coating time on film formation were explored. The study also revealed that thermal annealing and spin time significantly impact film crystallinity, morphology, and device performance, with bis(tri-n-butylsilyl oxide) SiPc showing the highest electron field-effect mobility among the studied materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Zachary J. Comeau, Nicole A. Rice, Cory S. Harris, Adam J. Shuhendler, Benoit H. Lessard
Summary: This study investigates the relationship between thin-films of phthalocyanines (Pcs) with various substituents and their response to the cannabinoid Delta(9)-tetrahydrocannabinol (THC) through organic thin-film transistor (OTFT) performance. The findings indicate that the morphology of semiconductor thin-films in Pc-based OTFT sensors can change significantly in the presence of analytes, driven by analyte-Pc coordination and film restructuring.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Yao Yao, Wei Huang, Jianhua Chen, Xiaoxue Liu, Libing Bai, Wei Chen, Yuhua Cheng, Jianfeng Ping, Tobin J. Marks, Antonio Facchetti
Summary: Flexible and stretchable bioelectronics, such as organic electrochemical transistors (OECTs), have received significant attention for in situ monitoring of biological systems. These devices exhibit advantages in biological sensing due to their ionic switching behavior, low driving voltage, and high transconductance. Recent research has focused on developing flexible/stretchable OECTs (FSOECTs) for biochemical and bioelectrical sensors, and this review summarizes the major accomplishments and challenges in this field.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Physical
Chenfang Sun, Tie Wang
Summary: The early determination of disease-related biomarkers can improve patient survival rate significantly. Therefore, explorations for new diagnosis technologies, such as optical and electrochemical methods, have been devoted to life and health monitoring. Organic thin-film transistor (OTFT), as a label-free, low-cost, facial, and rapid detection technology, has attracted significant attention. However, the reliability and accuracy of the biosensor need to be improved while ensuring sensitivity, selectivity, and stability.
Article
Chemistry, Physical
Maria Gireanu, Giulia Casula, Christian Blanck, Marc Schmutz, Christophe Contal, Navaphun Kayunkid, Piero Cosseddu, Analisa Bonfiglio, Ovidiu Ersen, Martin Brinkrnann
JOURNAL OF PHYSICAL CHEMISTRY C
(2015)
Article
Materials Science, Multidisciplinary
Giulia Casula, Piero Cosseddu, Yan Busby, Jean-Jacques Pireaux, Marcin Rosowski, Beata Tkacz Szczesna, Katarzyna Soliwoda, Grzegorz Celichowski, Jaroslaw Grobelny, Jiri Novak, Rupak Banerjee, Frank Schreiber, Annalisa Bonfiglio
ORGANIC ELECTRONICS
(2015)
Article
Materials Science, Multidisciplinary
P. Cosseddu, B. Fraboni, A. Scida, Y. Q. Wang, M. Nastasi, A. Bonfiglio
Article
Multidisciplinary Sciences
A. Spanu, S. Lai, P. Cosseddu, M. Tedesco, S. Martinoia, A. Bonfiglio
SCIENTIFIC REPORTS
(2015)
Article
Engineering, Electrical & Electronic
Stefano Lai, Piero Cosseddu, Annalisa Bonfiglio, Massimo Barbaro
IEEE ELECTRON DEVICE LETTERS
(2013)
Article
Engineering, Electrical & Electronic
Piero Cosseddu, Fabrizio Viola, Stefano Lai, Luigi Raffo, Annalisa Bonfiglio
IEEE ELECTRON DEVICE LETTERS
(2014)
Article
Engineering, Electrical & Electronic
Alberto Loi, Laura Basirico, Piero Cosseddu, Stefano Lai, Massimo Barbaro, Annalisa Bonfiglio, Perla Maiolino, Emanuele Baglini, Simone Denei, Fulvio Mastrogiovanni, Giorgio Cannata
IEEE SENSORS JOURNAL
(2013)
Article
Engineering, Electrical & Electronic
Lucia Seminara, Luigi Pinna, Maurizio Valle, Laura Basirico, Alberto Loi, Piero Cosseddu, Annalisa Bonfiglio, Alberto Ascia, Maurizio Biso, Alberto Ansaldo, Davide Ricci, Giorgio Metta
IEEE SENSORS JOURNAL
(2013)
Article
Materials Science, Multidisciplinary
P. Cosseddu, G. Tiddia, S. Milita, A. Bonfiglio
ORGANIC ELECTRONICS
(2013)
Article
Materials Science, Multidisciplinary
V. Scenev, P. Cosseddu, A. Bonfiglio, I. Salzmann, N. Severin, M. Oehzelt, N. Koch, J. P. Rabe
ORGANIC ELECTRONICS
(2013)
Article
Materials Science, Multidisciplinary
S. Lai, P. Cosseddu, G. C. Gazzadi, M. Barbaro, A. Bonfiglio
ORGANIC ELECTRONICS
(2013)
Article
Materials Science, Multidisciplinary
P. Cosseddu, S. Lai, G. Casula, L. Raffo, A. Bonfiglio
ORGANIC ELECTRONICS
(2014)
Article
Materials Science, Multidisciplinary
Elisa Tolu, Sebastiano Garroni, Eva Pellicer, Jordi Sort, Chiara Milanese, Piero Cosseddu, Stefano Enzo, Maria Dolors Baro, Gabriele Mulas
JOURNAL OF MATERIALS CHEMISTRY C
(2013)
Proceedings Paper
Engineering, Industrial
A. Spanu, M. Tedesco, S. Martinoia, S. Lai, P. Cosseddu, A. Bonfiglio
2015 18TH AISEM ANNUAL CONFERENCE
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
P. Cosseddu, F. Viola, S. Lai, L. Raffo, L. Seminara, L. Pinna, M. Valle, R. Dahiya, A. Bonfiglio