Peer-reviewed veterinary case report
Ultrathin metal mesh electrodes for clear organic solar cells
By Ning S et al.·2025·Westlake Institute for Optoelectronics, China·View original on Europe PMC →
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Original publication title: Ultrathin Metal Mesh Transparent Electrodes for ITO-Free Organic Photovoltaics.
Plain-English summary
This research focuses on a new type of transparent electrode made from a very thin copper and silver mesh, which could be useful for solar panels that don’t use indium tin oxide (ITO). The researchers found that by adjusting the spacing and width of the mesh, they could improve how well it collects energy from sunlight while still allowing a lot of light to pass through. When they set the mesh spacing to 5 micrometers and the width to 1 micrometer, the electrode allowed 85% of visible light to pass through and had a low resistance, making it effective for use in solar panels. They created a solar panel using this mesh that achieved a high efficiency of 14.2%, and they also made a semitransparent version with an efficiency of 8.3%. Overall, the new mesh electrode showed promising results for improving the performance of organic solar cells.
Abstract
With the advantages of low cost, high transparency and high conductivity, metal mesh electrodes are emerging as promising transparent electrodes in the electronics industry. However, due to the large spacing of the mesh, it is difficult to efficiently collect photogenerated carriers from the active layer, which makes metal mesh electrodes inapplicable to organic photovoltaic (OPV) devices. In this work, we report an ultrathin copper/silver (Cu/Ag) mesh transparent electrode with suitable mesh spacing by ultraviolet lithography technology. The mesh spacing and width can be fine-adjusted to tune the transparency and improve the charge collection efficiency. When the spacing was 5 μm and the width was 1 μm, the mesh electrode exhibited an average visible transmittance (AVT) of 85% with a sheet resistance (<i>R</i><sub>s</sub>) of ∼200 Ω/sq. Adopting this mesh electrode as the bottom transparent electrode, the ITO-free OPV was fabricated with a champion efficiency of 14.2%. Notably, the semitransparent device was also established with an efficiency of 8.3% and an AVT of 30.3% by using the ultrathin Cu/Ag mesh transparent electrode.
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Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/41217029