Excitons and narrow bands determine the optical properties of cesium bismuth halides
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DOI: 10.1103/physrevb.100.201404
Abstract: We study the optical properties of ${\mathrm{Cs}}_{3}{\mathrm{Bi}}_{2}{\mathrm{I}}_{9}$ nanoplatelets using a combination of first-principles density functional theory, $\mathit{GW}$ plus Bethe-Salpeter equation calculations, and spectroscopic experiments. We show that the material exhibits flat bands and hence high… read more here.
Keywords: determine optical; optical properties; excitons narrow; bands determine ... See more keywords