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Ultra‐Narrow Linewidth Photo‐Emitters
In article number 2204302, Khurram Shehzad, Hui Wu, Zhiming Wang, and co‐workers report that hot‐pressing bulk Selenium into nanoflakes induces structural changes in the Selenium lattice, which leads to ultra‐narrow bandwidth photoemission with full width at half maximum of 330 ± 90 μeV, an order of magnitude narrower than the other 2D materials at 300 K.
Photoluminescence (PL) in state‐of‐the‐art 2D materials suffers from narrow spectral coverage, relatively broad linewidths, and poor room‐temperature (RT) functionality. The authors report ultra‐narrow linewidth photo‐emitters (ULPs) across the visible to near‐infrared wavelength at RT in polymorphic selenium nanoflakes (SeNFs), synthesized via a hot‐pressing strategy. Photo‐emitters in NIR exhibit...
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