Luminescence and Colorimetric Properties of Ultrathin Cadmium Selenide Nanoscrolls

Luminescence and colorimetric properties of ultrathin two-dimensional CdSe nanostructures rolled into scrolls 2.5 monolayers thick are studied. It is shown that photoluminescence of samples under study is caused by interband transitions which corresponds to the violet region of the visible spectrum, and transitions involving surface states, which corresponds to the almost entire optical range. The relaxation dynamics of the excited states corresponding to these transitions was studied. The chromaticity coordinates and dominant wavelengths are calculated for ultrathin CdSe nanoscrolls. The colorimetric characteristics of nanoparticles under study are analyzed in comparison with thicker nanoscrolls and quasi-two-dimensional CdSe nanocrystals from the literature sources.