Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session F21: Towards Realizing the Energy FutureInvited Undergrad Friendly
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Sponsoring Units: GERA Chair: Maria Chan, Argonne Natl Lab Room: 302 |
Tuesday, March 3, 2020 8:00AM - 8:36AM |
F21.00001: Three Terminal Tandem Solar Cells Invited Speaker: Emily Warren Tandem and multi-junction solar cells provide a path to improved efficiencies and energy yields over single-junction solar cells. Mechanically-stacked, multi-terminal, multi-junction cells have proven to be the most efficient 1-sun devices at the laboratory scale. This approach enables the use of subcells grown by different techniques and does not require current or lattice-matching. For example, III-V or perovskite cells can be processed separately and then mechanically integrated with a Si bottom cell. However, this type of tandem device enables multiple approaches to interconnect the subcells, and each interconnection scheme has different implications for ease of fabrication, efficiency, and module assembly. |
Tuesday, March 3, 2020 8:36AM - 9:12AM |
F21.00002: Vertical GaN Power Electronics – Opportunities and Challenges Invited Speaker: Robert Kaplar Tremendous progress has been made in wide-bandgap (WBG) power electronic devices. Most WBG |
Tuesday, March 3, 2020 9:12AM - 9:48AM |
F21.00003: Advancements in soft magnetic materials for future energy needs Invited Speaker: Todd Monson Power electronics and motor drives are now transitioning to wide band gap semiconductors, operating at higher frequencies, and enabling faster rotational speeds in electrical machines. This is creating a need for improved soft magnetic materials that can sustain higher flux densities with lower losses. Many different materials and strategies are being pursued and it is almost certain that a mix of soft magnetic materials will be required to meet all current and emerging applications. I will provide a brief overview of the history of soft magnetic materials and discuss some of the most promising approaches to meet the needs of future power electronics and rotating machines. |
Tuesday, March 3, 2020 9:48AM - 10:24AM |
F21.00004: Data-Driven Discovery of Materials for Photocatalytic Energy Conversion Invited Speaker: Arunima Singh Photocatalytic fuel production, e.g. generation of hydrogen from water splitting or the conversion of the greenhouse gas carbon dioxide to chemical fuels, promises us alternative energy sources that are clean, environmentally friendly and renewable. Advancements have been made in improving the efficiencies and product selectiveness of currently known photocatalysts, but the attempts for finding new photocatalytic materials have been few and based largely on trial and error. |
Tuesday, March 3, 2020 10:24AM - 11:00AM |
F21.00005: Mixed Cation Water-in-salt electrolytes: Concentration study of Ion solvation, local order and nano-heterogeneity Invited Speaker: Michael Toney Solvent-in-salt (SIS) electrolytes differ substantially from the traditional electrolytes: in such systems amounts of the dissolved salt is equivalent or more by weight/volume of that of the solvent. As a result, SIS systems feature a number of unique properties and provide electrochemical performance advantages that could not be attained by usage of the traditional electrolytes. One of the notable examples of SIS electrolytes are highly concentrated “water-in-salt”, WIS, systems which were demonstrated to be highly attractive electrolytes for aqueous batteries since they can offer significantly extended stability window, improved coulombic efficiency and cycling stability.1,2,3,4 Yet, while it is clear that such an extreme increase in salt concentration would result in highly modified interactions of the ionic and molecular components of the electrolyte a detailed our understanding is still lacking. |
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