Title: Metal Oxide Based on Nanomaterials as Hole Transport Materials for High Efficiency and Stable Perovskite Solar Cells

Abstract:

Perovskite solar cells (PSCs) have certified efficiencies up to now around 25.5 %. This achievement is achieved in the presence of expensive organic hole‐transporting materials. In contract, inorganic hole‐ transport materials (HTMs) are still crucial and less used because the problem of solution processing. PSCs based on inorganic HTMs would reduce the cost associated with higher mobility and stability. In this way, the application of Cu2O in PSCs as top layer is still complicated due to the difficulty of solution processing. Herein, a solution‐ processing technique is applied for preparing Cu2O nanocubes as a new p‐type HTL in regular structure (n‐i‐p) PSCs. Cu2O nanocubes is achieved in a size range of 60–80 nm without using any surfactants, which are usually toxic and tricky to remove. Cu2O nanocubes with new structure enhances the carrier mobility with preferable energy alignment to the perovskite layer and superb stability. The PSCs based on this Cu2O nanocubes as HTMs could achieve higher efficiency exceeding 17 % with high stability, whereas organic P3HT‐based PSCs display an efficiency of 15.59 % with less stability. Finally, Cu2O nanocubes is indicates that a promising HTM for efficient and stable PSCs

Biography:

Ahmed Mourtada Elseman has obtained his B.Sc., M.Sc., and Ph.D. in Inorganic and Analytical Chemistry from Faculty of Science, Al-Azhar University, Egypt. He was awarded his Ph.D. in perovskite solar cells (February 2017). Also, he obtained two diplomae from Inner Mongolia Institute of Scientific and Technological, Hohhot, China 2015, and the second one from the Institute of New Energy, Wuhan, China, 2017. He works as Research Assistant Professor at the Department of Electronic and Magnetic Materials, Central Metallurgical Research & Development Institute (CMRDI), Egypt. He is awarded Talent Young Scientific (TYSP) Postdoctoral Research Fellow position funded by the Chinese Ministry of Science and Technology (MOST), Beijing, China, 2017-2018. Then, he received a lecturer position in the School of Materials and Energy, Southwest University, Chongqing. China (2018 – 2020). He is awarded the CMRDI prize for excellence scientific publication (2018). Awarded the 1st classification in Africa and Egypt in the field of low-cost perovskite solar cell research through the SciVal Analyzer website, 2020. His current research focuses on understanding the mechanisms, fundamental properties, and developing scalable protocols for high-efficiency perovskite solar cells. He is a reviewer and member of the editorial board for some journals.

Title: Critical Green Routing Synthesis of Silver NPs Using Jasmine Flower Extract for Biological Activities and Photocatalytical Degradation of Methylene Blue

Abstract:

Herin, we prepared silver NPs using jasmine flower extract. The green synthesis process reports a eco-friendly, nontoxic, cost-effective and simple approach to the synthesis of metal and metal oxide nanoparticles. Extract of jasmine flower acts as capping as well as stabilizing agent. The average crystalline size of the XRD pattern is estimated to be 40 nm. FT-IR (Fourier Transform Infrared) spectra confirm the existence of Ag NPs. The UV-Visible spectrum exhibits an absorption peak of between 380 and 440 nm. Structural analysis for silver nanofibers reveals with SEM and TEM technique. The antimicrobial activity of silver NPs was tested for both grams positive and negative bacteria by Agar well diffusion method. Methylene blue is used as a pollutant dye. Silver nanoparticles result in a maximum degradation efficiency of 78% at the end of 120 minutes.

Biography:

Awais Ahmad currently works at the Department of Chemistry, University of Lahore, Lahore Pakistan. He is editor of 4 International Elsevier book under micro and nanotechnologies series. He main focus is Exploring new products with help of nanomaterials, MOF, Polymer nanocomposite for promising applications such as photocatalysis, single atom catalysis, wastewater treatment, electrochemical sensor, biosensor, energy devices, water splitting, C02 fixation as well as hydrogen evaluation etc.