AI Article Synopsis
- Upconversion (UC) is a process where lower energy photons are used to emit higher energy photons, but challenges exist in achieving this on a molecular scale with lanthanide ions.
- Researchers created a molecular cluster-aggregate (MCA) that successfully demonstrates Ho ion upconversion, producing noticeable green and red emissions with a significant enhancement of the red to green ratio.
- The MCA combines a rigid spherical core and an optimal match of donor and acceptor levels, resulting in a high upconversion quantum yield of 5.24 × 10%.
Article Abstract
Upconversion (UC) is a fascinating process in which higher energy photons can be emitted from excitation by lower energy photons. The current challenge remains in downscaling and effectively achieving upconversion with lanthanide ions at the molecular scale. Here, using a rationally designed molecular cluster-aggregate (MCA), we demonstrate for the first time Ho ion molecular upconversion. The synthesized MCA exhibits identifiable Ho green and red UC emissions with a uniquely enhanced red to green ratio as well as a conventional near-infrared (NIR) emission. A combined rigid spherical cluster core with reduced molecular vibrations, ideally matched donor and acceptor excited levels a phonon-assisted mechanism, led to an upconversion quantum yield of 5.24 × 10%.
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| http://dx.doi.org/10.1039/d2nr02643k | DOI Listing |
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