Bio
Elias Stathatos graduated from the Physics Department in 1991 and received his PhD in Materials Science/School of Engineering in 1999, both from the University of Patras, Greece. He was a Visiting Scholar at the University of Cincin-nati, Ohio, USA, in 2004. From 2005 to 2019, he was a faculty member of the Technological Educational Institute of Pa-tras and is currently a Professor at the University of Peloponnese. In the period 2008–2010, he was Department Head of the Electrical Engineering Department at Technological Educational Institute of Patras. His research interests encom-pass different themes, such as the conversion of solar into electrical energy using dye-sensitized, quantum dot, and per-ovskite solar cells employing nanostructured materials. Furthermore, Prof. Stathatos is also interested in the application of electrochromic nanocomposite materials in smart windows as well as OLED and OFET devices and nanosensors in environmental applications. He is the author of more than 140 papers published in ISI journals recognized by more than 6500 citations, six book chapters, and five international patents related to solar cells and electrochromic devices. He has been an invited speaker or reviewer in numerous international journals. He is also Associate Editor of the International Journal of Photoenergy (Hindawi Publishing Corporation) in addition to being on the advisory board of their publication Materials Science in Semiconductor Processing. In 2020, he was appointed as Section Editor-in-Chief for the Section "Microe-lectronics and Optoelectronics" of Electronics. He has also organized several Special Issues in international journals.

Bio
Domenico Caputo is currently Associate Professor with tenure at the Department of Information Engineering, Electron-ics and Telecommunications, University of Rome “La Sapienza,” Rome, Italy. He teaches “Electronics” and "Biomedical Instrumentations” for Biomedical Engineering and “Integrated Electronic Devices" for Electronic Engineering. His re-search interests have included the development of amorphous silicon photodetectors from the UV to the near-infrared range, of innovative electronic devices based on amorphous silicon and the electrical characterization of non-volatile memories. His current research is focused on the development of thin-film photodetector and lab-on-chip systems for DNA amplification for bacteria and virus detection. He is co-author of more than 100 papers on international journals, referee of several scientific journals and principal investigator of national and international projects.

Talk
Two-dimensional (2D) materials are promising candidates for electronic, optoelectronic, and sensing applications. In this presentation, several applications of 2D materials in transistors, sensors, and field emitting devices are reported. The focus is on the wide family of transition-metal dichalcogenides (TMDs), such as MoS2, WSe2, PdSe2, and PtSe2. Nanosheets of TMDs, obtained by either mechanical exfoliation or chemical vapor deposition on SiO2/Si substrates, are used to discuss electric transport, modulation of the conductivity by a back-gate, photoresponse, effect of electron irradi-ation, and the role of surface adsorbates. It is shown that light causes photoconductive and photogating effects as well as desorption of adsorbates, which might result in both positive and negative photoconductivity. It is highlighted how positive and negative photoconductivity can coexist in the same device, the dominance of one type over the other being controlled by the environmental pressure. Electron irradiation strongly affects the performance of the devices and is exploited to reduce the Schottky barrier at the contacts, thus improving the TMD/metal contacts. It is shown that adsorbates can change the polarity of the charge-carriers and enhance the hysteresis in the transfer characteristics of TMD-based field-effect transistors. The dominant n-type behavior in a high vacuum and the sharp-edge geometry, as well as the presence of defects, facili-tate the extraction of electrons (field emission) from 2D materials upon application of an electric field. It is shown that TMDs are effective field emitters and that their emission current can be modulated by a back-gate.

Bio
Antonio DI BARTOLOMEO is a full professor of Experimental Condensed Matter Physics and president of the Physics Education Committee at the University of Salerno, Italy where he teaches semiconductor device physics and nanoelec-tronics. His present research interests include optical and electrical properties of nanostructured materials such as carbon nanotubes, graphene, and 2D materials, van der Waals heterostructures and Schottky junctions, field-effect transistors, non-volatile memories, solar cells, photodetectors, field emission devices, supercapacitors, and fuel cells. He received the Ph.D. in Physics in 1997 from Salerno University where he held the position of researcher in Experi-mental Physics before the appointment as a professor. His scientific career started at CERN (CH) with the collaboration with experiments on neutrino oscillations and heavy-ion collisions. He spent several years in the industry as a semi-conductor device engineer (ST Microelectronics, Infineon Technologies, and Intel Corporation) and was a guest scientist at IHP-Microelectronics (Germany) and Georgetown University (Washington, DC). He has given about 100 presentations in international conferences and has authored over 150 publications in peer-reviewed journals, two physics textbooks, and two patents. He is an Editorial Board member of several journals such as MDPI Electronics, Nanomaterials, and Sensors.

Bio
Professor Surojit Chattopadhyay is currently with the Institute of Biophotonics, National Yang Ming University, Taipei, Taiwan. He has a M.S, and PhD in Physics, from the University of Calcutta, India, in 1990, and 1996, respectively. He had been a Chevening Scholar at the University of Dundee, UK, and worked at the Institute of Atomic and Molecular Sciences, Academia Sinica, the Centre for Condensed Matter Sciences, National Taiwan University, and the Department of Electrical Engineering, National Chung Hsing University, Taichung, Taiwan. His primary training and research in-terests are in the area of semiconductor and nanomaterial synthesis for applications in solar cells, anti-reflection coat-ings, photodetectors, and protective coatings. In his current position, he is working on the synthesis of novel functional nanomaterials, including upconversion, for biomedical theranostics, imaging, drug delivery, and plasmonics for food toxin detection. His lab houses state of the art spectroscopies, and synthesis platforms.

Bio
Deep Jariwala is an Assistant Professor in the Department of Electrical and Systems Engineering at the University of Pennsylvania (Penn). Deep completed his undergraduate degree in Metallurgical Engineering from the Indian Institute of Technology BHU and his Ph.D. in Materials Science and Engineering at Northwestern University. Deep was a Res-nick Prize Postdoctoral Fellow at Caltech before joining Penn to start his own research group. His research interests broadly lie at the intersection of new materials, surface science and solid-state devices for computing, opto-electronics and energy harvesting applications in addition to the development of correlated and functional imaging techniques.