Review
Chemistry, Physical
A. Ashery
Summary: This study demonstrates the existence of negative capacitance at all frequencies and reveals that capacitance values can be both positive and negative across all frequencies, while conductance values are positive only. The structural and electrical characterization of the Au/AlCu/SiO2/p-Si/Al structure was investigated to understand the conduction mechanism.
Article
Physics, Condensed Matter
Gourab Bhattacharya, N. Vijay Prakash Chaudhary, Tapasendra Adhikary, Shampa Aich, A. Venimadhav
Summary: This study investigated electron transport across Galfenol and Nickel-based Schottky contacts on n-Si substrates through DC current-voltage measurements and AC Impedance spectroscopy. Improper back contact can cause additional bias dependent Resistance-capacitance components, which were studied using proper equivalent circuit models. The results showed distinct behavior in capacitance and barrier height, with negative capacitance observed in certain conditions. The use of an equivalent circuit with inductor-resistor relaxation provided a better fit for the experimental results.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Physics, Condensed Matter
Hassan M. Jaber Al-Ta'ii, Ali Ijam
Summary: This study examined the influence of alpha energy level on the Al/DNA/Al Schottky diode through J-V curve. The series resistance for irradiated samples was found to be higher, while the current density increased with increasing electric field. The electrical conductivity of non-radiated samples was higher at a voltage of 6.0 V, highlighting the significance of this device as a detector for alpha particles' radiation in bioelectronics applications.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
Andac Batur Colak, Tamer Guzel, Anum Shafiq, Kamsing Nonlaopon
Summary: This paper presents a new model that represents the symmetric connection between capacitance-voltage and Schottky diode. An artificial neural network structure is used to predict the capacitance voltage characteristics of the Schottky diode with organic polymer edge, and the effect of neuron numbers on prediction accuracy is evaluated.
Article
Multidisciplinary Sciences
Y. H. Wang, J. H. Su, T. W. Wang, Z. Y. Lei, Z. J. Chen, S. P. Shangguan, J. W. Han, Y. Q. Ma
Summary: This study quantitatively analyzed the defect properties of the AlCu-Si interface after high-temperature annealing by studying the deep level transient spectrum. It was found that the defect is located at +0.41eV on the valence band, with a concentration of 2.8 x10^13/cm^2 and a capture cross section similar to 8.5 x10^17. High-temperature treatment increased the density of states at the AlCu-Si interface, resulting in an increased reverse current of the heterojunction.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Condensed Matter
Mustafa Okutan, Andreas Bablich, Peter Haring Bolivar
Summary: This work reports on the performance enhancements of a double Schottky rectifier diode with Cu contact on top of p-type Si and a back-side-Al contact due to an optimized thermal annealing process. Thorough hydrofluoric acid treatment prior to annealing the sample for 15 min. at 450 degrees C in N2 atmosphere resulted in a decrease of the ideality factor and barrier height for non-ohmic and ohmic Schottky contacts. The results demonstrate the potential of these ohmic contacts for high current and low resistance Schottky diodes and applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Engineering, Electrical & Electronic
Jigui Miao, Yang Liu, Quan Yin, Shuai Zhao, Haichun Li, Huai Wang
Summary: This article proposes a lifetime estimation methodology that requires fewer data and testing time by introducing humidity dummy variables into the degradation model based on the multivariate linear regression (MLR) algorithm. The impact of introduced dummy variables with different structures on the degradation model is studied and the effect of the proposed lifetime estimation method is verified.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Liansheng Zhao, Yidan Tang, Yun Bai, Menglin Qiu, Zhikang Wu, Yu Yang, Chengyue Yang, Xiaoli Tian, Xinyu Liu
Summary: This study investigated the defects and electrical characteristics of 4H-SiC JBS diodes irradiated by 2 MeV protons at temperatures ranging from 100 to 400 K. It was found that as the irradiation temperature increased, the on-resistance decreased, leakage current increased, and DLTS spectrum intensity decreased.
Article
Physics, Condensed Matter
D. A. Oeba, J. O. Bodunrin, S. J. Moloi
Summary: The effects of proton irradiations on n-silicon-based Schottky diodes include a reduction in effective carrier density and an increase in resistivity of the material. These changes are caused by defects induced by proton irradiation, which play a role in recombination/compensation of charge carriers.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Abdullah G. G. Al-Sehemi, A. Tataroglu, Abdulkerim Karabulut, Aysegul Dere, Ahmed A. A. Al-Ghamdi, F. Yakuphanoglu
Summary: Al/ZnO/p-Si diodes with different doping concentrations of a boric acid-doped ZnO interlayer were fabricated. The boric acid-doped ZnO films were obtained using the sol-gel method and spin-coating technique. The diodes exhibited photovoltaic behavior under both dark and illumination conditions, with the diode with 5 wt.% H3BO3-doped ZnO interlayer showing the best diode properties. The diodes also exhibited photodiode and photocapacitor behavior, and their capacitance and conductance measurements indicated their potential use in optoelectronic technologies.
Article
Chemistry, Physical
Omer Sevgili, Faruk Ozel, Aydin Rusen, Evin Yigit, Ikram Orak
Summary: In this study, an Al/Ba2P2O7/p-Si device was fabricated using barium-based pyrophosphate at the interface layer. Characterization techniques such as AFM, SEM, and XRD were used to analyze the surface morphology and material characteristics. The electrical properties and photoresponsivity of the device were investigated, and various diode parameters were calculated. Additionally, the temperature response and capacitance-conductance-voltage characteristics of the device were studied.
SURFACES AND INTERFACES
(2022)
Article
Physics, Applied
Hajime Okumoto, Tetsuo Tsutsui
Summary: The study demonstrates that self-heating of devices is a source of negative capacitance in organic light-emitting diodes and hole-only devices. The principal mechanism of negative capacitance is the nonlinear coupling of the real and imaginary parts of admittance caused by AC temperature modulation. External heating induced negative capacitance, reflecting the heat transfer characteristics of the devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Sahar Elnobi, M. Dongol, T. Soga, Amr Attia Abuelwafa
Summary: The impact of a NiTPP thin film on the performance of an Au/n-Si Schottky device was investigated. The structural and topographical properties of the NiTPP/n-Si film were analyzed using XRD and AFM. The film was found to be nanocrystalline, with a average crystallite size of 33.87 nm and roughness of 4.30 nm. The molecular structure and purity were confirmed using Raman spectra. The diode parameters and conduction processes were determined and the photoresponse qualities were examined. Impedance spectroscopy was performed, and the equivalent circuit model was investigated to assess interface and recombination processes. The study highlights the potential of the Au/NiTPP/n-Si/Al diode as a photodetector in next-generation electronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Ali Baltakesmez, Betul Guezeldir
Summary: In this study, the effect of chlorine doping on GUAPbI3-xClx perovskite film formation and device applications was investigated. The results showed that chlorine doping improved the structure and performance of GUAPbI3-xClx perovskite film. The MIS and FET devices fabricated using GUAPbI3-xClx showed promising performance parameters, indicating the potential application of chlorine-doped perovskite materials in optoelectronic devices.
SURFACES AND INTERFACES
(2023)
Article
Physics, Condensed Matter
U. Chaitra, A. V. Muhammed Ali, M. G. Mahesha, Akshayakumar Kompa, Dhananjaya Kekuda, K. Mohan Rao
Summary: This study investigates the structural, optical and electrical properties of pristine and aluminium doped zinc oxide thin films deposited on fluorine doped tin oxide coated glass substrates using sol-gel spin coating technique. The effect of doping on the performance of Au/AZO/FTO Schottky diode was analyzed through I-V characterization, with parameters such as Schottky barrier height, ideality factor and series resistance determined to depend on doping concentration. Devices with undoped and 6 at% aluminium doped ZnO thin films showed better rectification performance.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Biochemistry & Molecular Biology
C. Karthikeyan, G. Jenita Rani, Fong-Lee Ng, Vengadesh Periasamy, M. Pappathi, Michael Jothi Rajan, Abdullah G. Al-Sehemi, Mehboobali Pannipara, Siew-Moi Phang, Md Abdul Aziz, G. Gnana Kumar
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2020)
Article
Chemistry, Physical
Souhad M. A. Daraghma, Sara Talebi, Vengadesh Periasamy
EUROPEAN PHYSICAL JOURNAL E
(2020)
Article
Chemistry, Multidisciplinary
Fong-Lee Ng, Siew-Moi Phang, Mitsumasa Iwamoto, Takaaki Manaka, Cheng-Han Thong, Keito Shimosawa, Vengadesh Periasamy, G. Gnana Kumar, Kamran Yunus, Adrian C. Fisher
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Materials Science, Multidisciplinary
Nastaran Rizan, Hairul Anuar Tajuddin, Yee Shin Tan, Zanariah Abdullah, Azila Idris, Vengadesh Periasamy
Summary: The use of DNA in molecular electronics and biosensors has attracted much interest due to its unique self-assembling behavior. Ionic liquid ([BMIM][Ace]) is a potential solvent that ensures long-term stability of DNA structures, improving rectifying profiles in DNA-based devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Souhad M. A. Daraghma, Sara Talebi, Vengadesh Periasamy
Summary: DNA, the blueprint of life, has attracted recent attention in its potential applications in electronics. Through experimental and theoretical studies, a better understanding of the electronic properties of DNA, particularly in the charge transfer process, has been achieved. This research provides a clearer conceptualization of the role of each nitrogenous base in the charge transfer process through the DNA molecule.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Nur Fatin Farhanah binti Nazarudin, Nastaran Rizan, Noor Azrina Talik, Vengadesh Periasamy, Hideki Nakajima, Saadah Abdul Rahman, Boon Tong Goh
Summary: In this study, DNA/NiSi NWs and DNA/Ag NPs-NiSi NWs Schottky diodes were fabricated, demonstrating significant morphological changes and optical property effects of DNA. Ag NPs-NiSi NWs exhibited better conductivity and rectifying behaviors, indicating higher sensitivity towards DNA compared to NiSi NWs diode.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Biotechnology & Applied Microbiology
Fong-Lee Ng, Siew-Moi Phang, Cheng-Han Thong, Vengadesh Periasamy, Jeccy Pindah, Kamran Yunus, Adrian C. Fisher
Summary: This study focused on utilizing microalgae for bioremediation of palm oil mill effluent (POME) and developing an algal-biophotovoltaic device to generate bioelectricity. Results showed that culturing microalgae in POME improved growth rate and photosynthetic performance.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Chemistry, Applied
Cheng-Han Thong, N. Priyanga, Ng Fong-Lee, M. Pappathi, Vengadesh Periasamy, Siew-Moi Phang, G. Gnana Kumar
Summary: Microalgae based biophotovoltaic (BPV) cells are proven to be innovative renewable energy generation devices. The development of electrochemically active and stable catalysts is crucial for improving BPV performance. By preparing bimetallic metal organic frameworks (MOFs) of copper (Cu) and nickel (Ni) and loading them onto indium tin oxides (ITO) as BPV anodes, efficient green energy generation can be achieved.
Article
Engineering, Electrical & Electronic
J. Saravanan, Mehboobali Pannipara, Abdullah G. Al-Sehemi, Sara Talebi, Vengadesh Periasamy, Syed Shaheen Shah, Md. Abdul Aziz, G. Gnana Kumar
Summary: The CuO/NiO/ACF membrane demonstrated high sensitivity, low sensing limit, and wide linear range in glucose sensing. The flexibility and innovative technological platform of CuO/NiO/ACF make it a promising material for high performance and durable glucose sensors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Hassan M. Jaber AL-Ta'ii, Entethar Jamil Rmadhan
Summary: The optical and structural properties of cellulose nitrate polymer (CN-85) were studied after annealing and irradiation, revealing changes in band gap energy and Urbach's energy values. UV-VIS analysis showed a shift in absorption edge towards longer wavelengths. This technique holds potential benefits for a wide range of applications including optoelectronics and microelectronic devices.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Chemistry, Multidisciplinary
Vengadesh Periasamy, Muhammad Musoddiq Jaafar, Karthikeyan Chandrasekaran, Sara Talebi, Fong Lee Ng, Siew Moi Phang, Georgepeter Gnana Kumar, Mitsumasa Iwamoto
Summary: The prevalence of photosynthesis and its potential as a renewable energy source has led to the development of solid-state semiconductive devices like photovoltaic solar cells. However, direct utilization of plant-based biophotovoltaics (BPV) has been impracticable. In recent years, fuel cells (FCs) relying on redox potentials of algae suspensions or biofilms have shown promise as clean power generators. These algal BPVs offer advantages such as carbon sequestration and biomass harvesting. Development of high-performance BPVs is reliant on upgraded anode materials with dynamically nanostructured surfaces, but challenges in optimizing these materials hinder commercial viability. Graphene-based carbonaceous materials have been explored for FCs due to their flexible surface functionalization properties, but disorders on the molecular scale restrict efficient charge coupling. Langmuir-Blodgett (LB) film has shown potential in addressing these limitations, but its application in BPVs remains untapped. A comprehensive understanding of LB film fabrication and electron transfer mechanisms is crucial for the scalability of BPVs.
Article
Physics, Condensed Matter
Hassan M. Jaber Al-Ta'ii, Ali Ijam
Summary: This study examined the influence of alpha energy level on the Al/DNA/Al Schottky diode through J-V curve. The series resistance for irradiated samples was found to be higher, while the current density increased with increasing electric field. The electrical conductivity of non-radiated samples was higher at a voltage of 6.0 V, highlighting the significance of this device as a detector for alpha particles' radiation in bioelectronics applications.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Biotechnology & Applied Microbiology
Cheng-Han Thong, Fong-Lee Ng, Vengadesh Periasamy, Wan Jeffrey Basirun, G. Gnana Kumar, Siew-Moi Phang
Summary: The global community is addressing the serious consequences of excessive fossil fuel use by utilizing renewable and non-renewable energy sources together. Biomass feedstocks, including microalgae, are being recognized as important energy providers to meet the needs of a growing economy and society. Algae are efficient at photosynthesis, can grow on various substrates, and are tolerant to extreme conditions. Integrating microalgae into photovoltaic platforms is an innovative technique for low-power energy supply. Our algal biophotovoltaic (BPV) platforms have been improved to produce bioelectricity, treat wastewater, and absorb CO2. This study demonstrates the sustained power output and performance of our BPV platforms after nutrient replenishment, showing their potential as long-term low-power generators.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Vengadesh Periasamy, Prince Nishchal Narayanaswamy Elumalai, Sara Talebi, Ramesh T. T. Subramaniam, Ramesh Kasi, Mitsumasa Iwamoto, Georgepeter Gnana Kumar
Summary: Conventional three-electrode systems used in electrochemical measurement require time-consuming and maintenance intensive procedures. In this study, a miniaturized printed circuit board (PCB) with the same metal (gold) for all three electrodes was used to simplify the design. The novel PCB-based same-metal three-electrode system showed comparable cyclic voltammetric profiles to conventional systems, but required fewer activation cycles and exhibited higher redox sensitivity and detection window.
Meeting Abstract
Plant Sciences
Cheng Han Thong, Siew Moi Phang, Fong Lee Ng, Vengadesh Periasamy, Kamran Yunus, Adrian C. Fisher