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Economical Buffer Layer Boosts Performance of Organic Solar Cells
New compositions of matter have been invented, specifically organic buffer layer materials that can greatly enhance power conversion efficiency (PCE) of organic photovoltaic (OPV) devices and can effectively functionalize metal electrodes. Conventional-architecture OPV devices made using the new buffer layer have average PCEs greater than 8%, with the highest PCE value exceeding 9.5%. This new buffer layer can be used with Ag, Cu, and Au cathodes, opening routes to all-solution-based device fabrication and roll-to-roll processing. In addition, the new buffer layer materials can be applied at a layer thickness of up to 55 nm, avoiding processing challenges that occur with ultrathin buffer layers and enabling a simplified and reproducible process for device fabrication.
Published: 6/11/2021   |   Inventor(s): Todd Emrick, Thomas Russell, Zachariah Page, Yao Liu
Category(s): Physical Science, Material science, Clean Energy, Devices
Stablizing Liquid Drops ofof Arbitrary Shapes by the Interfacial Jamming of Nanoparticles
Published: 6/11/2021   |   Inventor(s): Thomas Russell, Todd Emrick, Mengmeng Cui
Category(s): Material science, Nanotechnology, Engineering, Physical Science
Anti-flammable Compounds and Adhesive Materials
This invention provides new chemical compositions and methods for the preparation of adhesive materials with low flammability. The low flammability is due to newly invented organic/polymeric components used in the adhesive formulation, rather than through the addition of a conventional anti-flammable additives such as halogenated organic molecules or phosphorous-containing structures.
Published: 6/11/2021   |   Inventor(s): Todd Emrick, Justin Timmons, Megan Szyndler
Category(s): Chemicals, Environmental, Material science, Physical Science
Novel Graft Copolymers as Anti-fouling Membrane Coating Materials
When commercially available polymer membranes are exposed to aqueous solutions of salt, emulsified oil droplets, and other particulate matter, their lifetime can decrease catastrophically due to reduction in flux as a result of membrane fouling. This technology provides a new class of graft copolymers capable of extending the lifespan and functionality of water purification membranes. As a membrane coating material, the graft copolymers have excellent hydrophilicity and anti-fouling properties. In addition, they contain UV-activatable functional groups to enable UV-crosslinking of the copolymers, both within the coating itself to impart structural stability and into the underlying membrane to promote strong adhesion. These graft copolymer coatings are highly effective in preventing fouling of water-filtration membranes, and in maintaining the flux levels necessary for efficient filtration. Unlike other coating materials, the anti-fouling graft copolymers do not delaminate from the membrane substrate.
Published: 6/11/2021   |   Inventor(s): Todd Emrick, Kurt Breitenkamp, Ravindra Revanur, Benny Freeman, Bryan Mccloskey
Category(s): Physical Science, Material science
Amphiphilic Polymer Capsules and Related Methods of Interfacial Assembly
A chemical crosslinking process is used to prepare capsules from PEGylated polyolefins using either oil-in-water (i.e., oil inside the capsule in a water-based system), or water-in-oil system. The covalent network structure of these capsules make them more robust than many other systems under investigation in controlled-release.The unique nature of the crosslinking chemistry is such that the crosslinks can be made either hydrolytically stable or unstable. Those with hydrolytically stable crosslinks have longer carrier lifetimes, while those with hydrolytically unstable crosslinks will degrade over a time period that can be controlled by crosslink density and the type of crosslinker used.
Published: 6/11/2021   |   Inventor(s): Todd Emrick, Kurt Breitenkamp
Category(s): Material science, Therapeutics & prevention, Biotechnology
Novel Zwitterionic Polymers as Novel Polymeric Surfactants, Coatings and Interlayers
This invention provides a new class of zwitterionic polymers that exhibit hydrophobic properties and are soluble in polar organic solvents, allowing for their use as novel polymeric surfactants, and as functional materials in other applications.
Published: 12/20/2019   |   Inventor(s): Todd Emrick, Marcel Brown
Category(s): Material science, Chemicals, Physical Science
Branched Deoxybenzoin Polymers as Polymeric Flame Retardants
This invention provides inherently flame-resistant, branched deoxybenzoin polymers. Such polymers can be used as additives to impart flame-retardant properties to polymer blends, as well as to improve the processability of the polymer blends.
Published: 12/19/2019   |   Inventor(s): Todd Emrick, Moira Brown, Elizabeth Stubbs
Category(s): Material science, Physical Science
Novel Hydrophilic Conjugated Polymers as Efficient Hole Extraction Layers for Solar Cell Applications
This invention provides novel hydrophilic conjugated polymers that can be used as hole extraction layers in solar cells to enhance power conversion efficiency and solar cell stability. The polymers can be synthesized in water at room temperatures without using toxic transition metals or flammable organic solvents.
Published: 2/28/2019   |   Inventor(s): Todd Emrick, Zachariah Page, Yao Liu, Thomas Russell
Category(s): Physical Science, Material science, Clean Energy
Water-Soluble Temozolomide Derivatives and Polymer-Temozolomide Conjugates for Enhanced Glioblastoma Treatment
This invention provides novel compositions of water-soluble small molecule temozolomide derivatives and water-soluble polymer-temozolomide conjugates for enhanced treatment of glioblastoma multiforme.
Published: 5/9/2018   |   Inventor(s): Todd Emrick, Matthew Skinner, Banishree Saha
Category(s): Therapeutics & prevention, Life Sciences, Healthcare
Flame Retardant Monomers and Crosslinked Polymers
This invention provides flame retardant monomers and polymers. The monomers are unsaturated deoxybenzoin compounds that are inherently fire resistant and can decrease the flammability of unsaturated polymers by crosslinking the polymers.
Published: 5/1/2018   |   Inventor(s): Todd Emrick, E. Bryan Coughlin, Megan Szyndler, Aabid Mir, Justin Timmons
Category(s): Chemicals, Material science, Physical Science
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