The University of Massachusetts Amherst

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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: 8/10/2023   |   Inventor(s): Todd Emrick, Thomas Russell, Zachariah Page, Yao Liu
Category(s): Physical Science, Material science, Clean Energy, Devices
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: 8/10/2023   |   Inventor(s): Todd Emrick, Zachariah Page, Yao Liu, Thomas Russell
Category(s): Physical Science, Material science, Clean Energy
Polymeric Interlayer Boosts Performance of Organic Solar Cells
This invention provides new polymeric interlayer materials that can greatly enhance the power conversion efficiency (PCE) of organic or polymer solar cells.
Published: 8/10/2023   |   Inventor(s): Todd Emrick, Thomas Russell, Zachariah Page, Yao Liu
Category(s): Material science, Physical Science, Clean Energy