Article
Polymer Science
R. Marnadu, J. Chandrasekaran, Tien Dai Nguyen, J. H. Chang, K. Mohanraj, T. Alshahrani, Mohd. Shkir, P. Kathirvel
Summary: The study successfully prepared pure CeO2 and Ni-doped cerium oxide (NDC) films using jet nebulizer spray pyrolysis process, enhancing the performance of NDC diode. Nickel doping increased the crystallite size of CeO2 film, decreased the bandgap, and had a significant impact on surface morphology and photoluminescence, resulting in a photodiode with excellent electrical properties.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Hasan Albargi, R. Marnadu, G. Sujithkumar, Ali S. Alkorbi, Hassan Algadi, Mohd Shkir, Ahmad Umar, Gedi Sreedevi
Summary: In this study, Co3O4 thin films with different doping levels were prepared and their structural, morphological, optical, and electrical properties were analyzed. The optical band gap of Co3O4 film was found to increase after adding Sn ions, and p-Sn doped Co3O4/n-Si junction diodes showed reduced ideality factors under dark and light conditions, indicating high sensitivity.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Physical
A. M. Mansour, S. A. Gad, A. M. Moustafa, G. M. Mahmoud
Summary: In this study, molybdenum trioxide (MoO3) prepared by the solvothermal method was successfully deposited using conventional thermal evaporation technique. The XRD and optical properties were studied as a function of annealing temperatures, showing enhanced crystallization and reduced defects with increasing temperatures. The films exhibited an increase in optical energy gap and refractive index due to partial filling of oxygen vacancies, leading to increased crystallinity.
Article
Chemistry, Physical
A. Ashery, Mohamed M. M. Elnasharty, I. M. El Radaf
Summary: Ni/SiO2/p-Si MIS diode was successfully developed by liquid phase epitaxy process. The structural and surface morphology were investigated, and the electrical properties were evaluated in relation to different dielectric parameters and bias dc voltage.
Article
Chemistry, Inorganic & Nuclear
M. Raja, R. Marnadu, M. Balaji, K. Ravikumar, V. Gopala Krishna, Mohanraj Kumar, Ehab El Sayed Massoud
Summary: In this work, gallium-doped tungsten trioxide (Ga@WO3) films and n-Ga@WO3/p-Si diodes were fabricated. The impact of Ga dopant on the physical properties of WO3 films was analyzed. The results showed that higher Ga dopant concentrations led to the presence of Ga in the crystal structure of o-GaWO3. The doped WO3 thin film exhibited higher conductivity and lower activation energy at room temperature. The performance of n-WO3/p-Si diodes was enhanced with Ga dopant concentration.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
S. Bhuvaneswari, M. Seetha, J. Chandrasekaran, R. Marnadu, Yoshitake Masuda, Omar M. Aldossary, Mohd Ubaidullah
Summary: Octahedral novel indium tin oxide (ITO) films were fabricated on glass substrates using spray pyrolysis technique with different tin doping concentrations. XRD, surface morphology analysis, XPS inspection, and optical properties studies showed the proper tin doping in indium oxide crystal lattice, improved conductivity, and changes in bandgap.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Electrical & Electronic
P. Vivek, J. Chandrasekaran, V. Balasubramani
Summary: The metal-insulator-semiconductor (MIS) photo detector based on Y-MoO3 film with different concentrations of Y demonstrates variations in photoelectric properties. This study provides insights into the performance of MIS devices using Y-MoO3 film.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Physics, Condensed Matter
Suhaas Gupta, Arun Kumar, Samrat Mukherjee, Kamal Kumar Kushwah, Sujeet Kumar Mahobia, Pragati Patharia, Anil Kushwaha, Deepak Yadav, Umesh Kumar Dwivedi, Sunil Kumar, Ravi Kant Choubey
Summary: In this study, ZnS thin film was deposited on a p-type Si-substrate using a chemical bath deposition method. The fabricated Ag/n-ZnS/p-Si/Ag heterojunction device showed diode behavior and its parameters were investigated in the temperature range of 0-60 degrees C. Various characterization techniques were used to analyze the properties of the ZnS thin film, including grazing incidence X-ray diffraction (GIXRD), scanning electron microscopy (SEM), UV-Visible absorption spectroscopy, photoluminescent emission (PLE) spectroscopy, and current-voltage (I-V) measurements.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Inorganic & Nuclear
T. Sasikala, K. Shanmugasundaram, P. Thirunavukkarasu, J. Chandrasekaran, P. Vivek, R. Marnadu, M. Aslam Manthrammel, S. Gunasekaran
Summary: This study demonstrated the preparation of MoS2 thin films at various temperatures using the JNSP technique, showing that films deposited at 550 degrees Celsius exhibited the smallest band gap. The conductivity values increased with substrate temperature, and a p-Si/n-MoS2 diode with positive photo conducting nature was fabricated, indicating potential for optoelectronic device applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
V Jagadeesan, Venkat Subramaniam
Summary: This study developed an automated nebulizer-spray pyrolysis system and compared the properties of zinc-doped copper oxide thin films prepared using manual and automated systems. Results showed that films prepared with the automated system had smaller crystal sizes, more uniform particles, better optical, and electrical properties.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
G. Pradeesh, Tien Dai Nguyen, V. Ponnuswamy, R. Marnadu, J. Chandrasekaran, Mohd. Shkir
Summary: The synthesis and characterization of molybdenum oxide nanoparticles were presented in this work. The MoO3 NPs exhibited crystalline nature with an orthorhombic crystal system, confirmed by XRD profiles. SEM showed nano flakes morphology, and TEM analysis indicated a single-phase orthorhombic crystal structure. The diode prepared with Hydrochloric acid showed better rectifying behavior with lower ideal factor values.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
B. Das, J. Schulze, U. Ganguly
Summary: The article proposes an epitaxial vertical biristor with an asymmetric doping profile to achieve sub-bandgap impact ionization in the negative polarity. Experimental results demonstrate low latch-up voltage, faster programming, and a larger read window for the device.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Materials Science, Multidisciplinary
Rishabh Raj, Himanshu Gupta, L. P. Purohit
Summary: In this study, vanadium pentoxide (V2O5) thin films were successfully grown on soda-lime glass using RF magnetron sputtering technique. The impact of different sputtered power on the growth, structural and optical properties of V2O5 films was systematically studied. The results showed that V2O5 films exhibited a preferred crystal orientation and good transmittance. The performance of the Schottky diode with V2O5 interface layer (IF) for solar cell applications was also investigated, which demonstrated the important role of the V2O5 layer in enhancing the diode's performance.
Article
Chemistry, Physical
R. Marnadu, S. Karthik Kannan, M. Vidhya, G. Sujithkumar, K. Mohanraj, S. M. Maruthamuthu, Abdullah M. Al-Enizi, Mohd Ubaidullah, Sreedevi Vasudeva Reddy Minnam Reddy
Summary: A p-Si/n-SDC junction diode with higher photocurrent was fabricated using pure and Silver doped CeO2 (SDC) thin-film prepared through facile spray pyrolysis. The conductivity of SDC films was found to improve while increasing the doping level of Ag. The results showed a higher ON-OFF response for the SDC diode compared to the p-Si/n-CeO2 diode.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
R. Jansi, M. S. Revathy, S. Vinoth, Anuj Kumar, R. S. Rimal Isaac, N. Deepa, Abdullah M. Al-Enizi, Mohd Ubaidullah, Bidhan Pandit, Mohd Shahazad, Manish Gupta
Summary: In this study, different doping concentrations of Lanthanum doped Molybdenum trioxide thin films were prepared using Nebulizer spray pyrolysis technique. The crystal structure, morphology, optical properties, and gas sensing properties of the films were investigated. The results showed that 2 wt% La doped MoO3 thin film exhibited the highest crystallite size and optimal gas sensing performance.
Article
Polymer Science
P. Sumathi, J. Chandrasekaran, S. Muthukrishnan, J. H. Chang, K. Mohanraj, S. Karthik Kannan
Summary: The study involved coating WS2 and Cu-doped WS2 thin films using the JNSP technique with different doping levels and optimal substrate temperature. Various characterization methods were used to analyze the morphology, structure, and properties of the films. The results showed that Cu-doped WS2 thin films had improved optical bandgap and n-type behavior compared to pristine films.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
P. Jayamurugan, S. Deivanayaki, S. Ashokan, V. Gopala Krishnan, N. V. S. S. Seshagiri Rao, J. Chandrasekaran, Ehab El Sayed Massoud
Summary: In this study, Graphite/polyaniline composites with different weight percentages of MnO2 were synthesized at room temperature. The influence of MnO2 on the electrical, optical, structural and antibacterial activity of the composites was investigated.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
A. Panneerselvam, K. S. Mohan, R. Marnadu, J. Chandrasekaran
Summary: The study investigates the fabrication of metal-insulator-semiconductor Schottky barrier diodes with rare earth metal oxide Yb2O3 thin films as insulators using low-cost jet nebulizer spray pyrolysis technique. Various characterization techniques were used to analyze the structural, morphological, and opto-electrical properties of the Yb2O3 thin films. The experimental results show that the SBD fabricated at 550 degrees C exhibits good performance and is suitable for thermal dependent electronic device applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
V Manikandan, R. Marnadu, J. Chandrasekaran, S. Vigneselvan, R. S. Mane, Craig E. Banks, Ali Mirzaei
Summary: An ultrahigh photosensitive diode was developed using Cu-doped CeO2 thin film with good structural arrangement and mechanical properties. The electrical conductivity was improved by Cu-doping, which altered the bandgap energy and resulted in superior photoresponsivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
M. Saravanakumar, J. Chandrasekaran, M. Krishnakumar, B. Babu, B. Mohanbabu, G. Vinitha
Summary: This study focuses on the growth and characterization of single crystals of hexamethylenetetramine 4-nitrophenol monohydrate (HMTNP). Various experimental techniques were employed to investigate the crystal structure, molecular arrangement, optical properties, and charge transfer interactions of HMTNP, including X-ray diffraction, spectroscopy, and microscopy. The results reveal important insights into the crystalline nature and functional properties of HMTNP.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Engineering, Electrical & Electronic
P. Vivek, J. Chandrasekaran, V. Balasubramani
Summary: The metal-insulator-semiconductor (MIS) photo detector based on Y-MoO3 film with different concentrations of Y demonstrates variations in photoelectric properties. This study provides insights into the performance of MIS devices using Y-MoO3 film.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
T. G. Vignesh Prabhu, J. Chandrasekaran, D. Thangaraju, P. Vivek, S. Gopi
Summary: Three different natural dyes were extracted and used to fabricate natural dye-sensitized solar cells. The N-DSSC with GA photo-anode showed the highest efficiency among the dyes used in this investigation.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
M. Saravanakumar, J. Chandrasekaran, M. Krishnakumar, B. Babu, V Mohanraj, G. Vinitha
Summary: The slow evaporation method was used for growing HMTNB single crystals, and various analytical techniques were employed to investigate its crystal structure, chemical composition, and properties. The study discovered unique optical, electrical, and photoconducting properties of HMTNB, provided insights into its hydrogen bonding interactions, and established the charge transfer mechanisms using quantum chemical calculations.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
M. Saravanakumar, J. Chandrasekaran, M. Krishnakumar, Merin George, G. Vinitha, Mohd Anis
Summary: Single crystals of hexamethylenetetraminium hydrogen DL-malate (HMTM) have been synthesized by a slow evaporation method and their structure has been analyzed. The crystal shows non-centrosymmetric properties and exhibits absorption and emission properties in the UV-visible spectrum. Other properties such as dielectric behavior, photoconductivity, and second harmonic generation efficiency have also been studied.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Balaji Murugan, Sang Yeol Lee
Summary: This article presents the potential of devices based on 2D materials for developing high information density multi-valued logic circuits, and reviews the recent advances in emerging 2D materials.
Article
Engineering, Electrical & Electronic
Balaji Murugan, Sang Yeol Lee
Summary: The effect of different oxygen flow rates during RF sputter deposition on a-SZTO TFTs was investigated. Increasing the oxygen flow rate led to a positive shift in the threshold voltage, reducing the electron concentration by decreasing oxygen vacancies. UV irradiation significantly shifted the threshold voltage from enhancement to depletion mode due to the creation of oxygen vacancies. Interestingly, UV irradiation had a greater impact on Vth and ION/OFF ratio for TFTs prepared at lower oxygen flow rates. UV irradiation did not significantly affect the field-effect mobility. Negative bias stress measurements were performed and analyzed for different oxygen flow rates under UV irradiation treatment.
SOLID-STATE ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
T. G. Vignesh Prabhu, J. Chandrasekaran, D. Thangaraju, P. Vivek, V. Balasubramani
Summary: Natural dye sensitizers were extracted from Terminalia catappa, Azadirachta indica, and Clitoria ternatea using water as a solvent to sensitize the bare photo-anodes of N-DSSCs. The anchoring capability of the extracted sensitizers towards metal oxides was confirmed. UV-Vis-DRS Spectra were used to compare the light-harvesting capability of the different composites. The overall efficiency of N-DSSCs incorporated with 1wt% MoO3-based photo-anode sensitized with the natural dye sensitizers showed diminished results compared to pure TiO2-incorporated photo-anodes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Balaji Murugan, Sang Yeol Lee
Summary: We experimentally demonstrated resonant tunneling and negative differential resistance (NDR) in a-SZTO/dielectric/SZTO heterostructure thin film transistors (TFTs) at room temperature (RT) for the first time. Different middle-layer dielectric and gate biases were studied for resonant tunneling and NDR tunability. The results showed that NDR with a peak-to-valley current ratio (PVCR) of 3 at RT can be achieved using bulk oxide materials (3D) for the first time.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
V. Manikandan, G. Ayyannan, Iulian Petrila, Rajaram S. Mane, Kamil Sobczak, J. Chandrasekaran, Robert D. Crapnell, Craig E. Banks
Summary: Ni-doped alumina nanoflakes show efficient and fast response to target gas SO3 at different concentrations, with improved response and shorter response time at higher temperatures. The sensor demonstrates stability and reproducibility over a long period of testing, making it suitable for practical applications. The Ni-dopant enhances oxygen adsorption and active sites, contributing to the excellent sensing properties.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
J. H. Rakini Chandrasekaran, S. Nithiyanantham
Summary: This paper uses ultrasonic study to analyze the acoustic and thermodynamic behavior of water and water-ethanol solutions, specifically looking at the interactions between molecules. The study evaluates various parameters such as adiabatic compressibility and intermolecular free length, and discusses the significance of solute-solvent interaction in the chosen solutions. FTIR analysis is used to support the findings.
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2022)
