Luminescence of CsPbCl₃-like quantum dots in CsCl:Pb crystals

Absorption and luminescence characteristics of CsPbCl₃-like quantum dots in as-received as well as in quenched and subsequently annealed CsCl:Pb crystals have been studied with a spectral resolution of 0.2 nm at temperatures 12-300 K. A complicated structure of absorption, emission and excitation spectra has been found and its dependence on the annealing temperature and time duration is examined. The temperature dependences of the intensities, positions and halfwidths of the spectral bands have been measured. An anisotropic quantum dot growth has been proposed for the explanation of the structural character of the spectra and their temperature dependences.