Article
Chemistry, Physical
Y. X. Ma, H. Su, W. M. Tang, P. T. Lai
Summary: The resonance between gate electrode plasmons and gate oxide phonons in metal-oxide semiconductor devices can degrade carrier mobility in the semiconductor channel. This phenomenon poses a temperature-related reliability issue for electronic circuits when carrier freeze-out reduces carrier density in the gate electrode, leading to resonance-induced mobility reduction.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Hui Su, Wing Man Tang, Pui To Lai
Summary: The study found that the carrier mobility of IGZO TFTs tends to increase with increasing gate doping concentration, but may unexpectedly decrease at certain concentrations, possibly due to a resonance effect between the gate electrode and the gate dielectric.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Engineering, Electrical & Electronic
Hao Sun, Hui Su, Peter T. Lai
Summary: The influence of gate-dielectric annealing temperature on carrier mobility in InGaZnO thin-film transistors was investigated. Surprisingly, the sample with the highest annealing temperature showed the lowest carrier mobility, which can be attributed to the thickest interlayer formed at this temperature resulting in the weakest screening effect.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Chemistry, Physical
Junhwan Choi, Min Ju Kim, Joo-Young Kim, Eun Kyung Lee, Changhyeon Lee, Youngkeun Park, Juyeon Kang, Jeong-Il Park, Byung Jin Cho, Sung Gap Im
Summary: The electrical characteristics of organic thin-film transistors (OTFTs) are analyzed based on the alkyl chain length of organic semiconductors and surface polarity of polymer dielectrics in this study. It is found that the OTFT performance can be improved by increasing the alkyl chain length in organic semiconductors, while the non-polar dielectric layer can enhance the charge transport characteristics.
Article
Engineering, Electrical & Electronic
Hao Sun, Yuanxiao Ma, Zichui Liu, Peter T. Lai
Summary: This work investigates the effects of a low-kappa SiO2 interlayer on the remote phonon scattering (RPS) and carrier mobility in InGaZnO thin-film transistors (IGZO TFTs) with a double-layered high-kappa gate dielectric. The results show that the SiO2 interlayer affects the electrical coupling between the gate electrode and the high-kappa NdHfO layer, resulting in changes in carrier mobility.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Ankit Verma, V. N. Mishra, Rajiv Prakash
Summary: In this article, a self-aligned, cost-efficient, fully solution-processed, and low-voltage operated high-k dielectric-based p-channel organic thin-film transistor (OTFT) has been developed and investigated for toxic ammonia analyte at room temperature. The study reveals that this novel low-voltage OTFT device is capable of operating at -2 V and has shown a high sensitivity toward ammonia gas detection at RT.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Ankit Verma, V. N. Mishra, Rajiv Prakash
Summary: In this study, a self-aligned, cost-efficient, fully solution-processed, and low-voltage operated high-k dielectric-based p-channel organic thin-film transistor (OTFT) was developed for toxic ammonia analyte detection at room temperature. The OTFT sensor showed a high response rate of 47% at 5 ppm NH3 analyte and a low detection limit of 11.65 ppb. The developed sensor exhibited stable performance independent of relative humidity variations in the range of 30%-70%. The study demonstrates the capability of this novel low-voltage OTFT device to detect ammonia gas at room temperature.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Sungmi Yoo, Dong-Gyun Kim, Hyunjin Park, Jinha Ha, Jinsoo Kim, Jong Chan Won, Yun Ho Kim
Summary: A solution-processable and photocurable polyurea (PU) with excellent electrical and dielectric properties is synthesized and applied as a gate dielectric in high-performance organic thin-film transistors (OTFTs). The photo-crosslinked PU film improves dielectric properties and thermal and chemical resistance compared with pristine PU films. The performance of the c-PU thin film as a gate dielectric is demonstrated in DNTT-based and diketopyrrolopyrrole-thienothiophene copolymer-based OTFTs.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
S-J Wang, M. Sawatzki, H. Kleemann, I Lashkov, D. Wolf, A. Lubk, F. Talnack, S. Mannsfeld, Y. Krupskaya, B. Buechner, K. Leo
Summary: Rubrene single crystal domains with hundreds of micrometers size covering different substrates are achieved by thermal annealing and the assistance of a thin glassy underlayer, enabling high-performance rubrene crystalline transistors. The contact resistance of the transistors is significantly reduced through doping techniques, paving the way for novel high-performance organic electronics using crystalline active materials.
MATERIALS TODAY PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Ankit Verma, Shipra Gupta, V. N. Mishra, Rajiv Prakash
Summary: This study focuses on the fabrication and characterization of a low-voltage, flexible organic thin film transistor (OTFT) for ammonia sensing. The device utilizes a hybrid dielectric layer and a polymer/2-D nanocomposite as the gate oxide and active layer respectively. The results show that the fabricated device has good electrical characteristics and can detect ammonia gas at low concentrations.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Engineering, Electrical & Electronic
Sudipta Kumar Sarkar, Dinabandhu Maji, Javed Alam Khan, Siddharth Kurup, Dipti Gupta
Summary: This study demonstrates the low-cost fabrication of high-k dielectric and semiconducting layers for flexible thin-film transistors using photonic curing. These devices exhibit high performance, low-voltage operation, and mechanical flexibility. Photonic curing is shown to be a viable method for the fabrication of solution-derived ZnO and ZrO2 layers.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Zhihao Liang, Weijing Wu, Xiao Fu, Honglong Ning, Wei Xu, Xin Xiong, Tian Qiu, Cheng Luo, Rihui Yao, Junbiao Peng
Summary: In this study, a flexible dielectric layer was prepared by combining HfMgTiYZrOx high-entropy metal oxide and poly(vinyl alcohol) (PVA) organic material. The fabricated metal-insulator-metal (MIM) and TFT devices showed good performance in flexible tests, with low leakage current and high transparency. These findings suggest that high-entropy PVA hybrid films have great potential for applications in transparent and flexible devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
R. Nirosha, Rajesh Agarwal
Summary: This study presents a comparative analysis of the performance of a p-type organic thin-film transistor for temperature sensing using organic and inorganic dielectrics. The findings suggest that high-k dielectric demonstrates optimum performance with a low subthreshold slope, high ON/OFF ratio, low contact resistance, and linear decrease in threshold voltage with increasing temperature. The study emphasizes the importance of the ON/OFF ratio, threshold voltage, and subthreshold slope in determining the performance of the sensors.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Chuan Yu Han, P. T. Lai, Wing Man Tang
Summary: High-performance pentacene organic thin-film transistors with Hf-0.13 La0.87O gate dielectric and Pd gate electrode show high carrier mobility on both Si and PI substrates, with good stability after exposure to air for 30 days without encapsulation.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Zeno Schumacher, Rasa Rejali, Megan Cowie, Andreas Spielhofer, Yoichi Miyahara, Peter Grutter
Summary: Inducing an inversion layer in organic semiconductors is a critical achievement for producing OFET devices, and a new pulsed bias technique is developed to characterize the dopant type of different organic material systems. This technique accurately identifies n-doping in pentacene/PTCDI heterostructure, demonstrating that nanometer-scale lateral extent and thickness are sufficient for an OFET device to operate in the inversion regime.
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)