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 cryst als have been studied with a spectral resolution of 0.2 nm at temperatures 12-300 K. A complicated structure of absorption, emission and excitation sp ectra has been found and its dependence on the annealing temperature and ti me duration is examined. The temperature dependences of the intensities, po sitions and half widths of the spectral bands have been measured. An anisot ropic quantum dot growth has been proposed for the explanation of the struc tural character of the spectra and their temperature dependences.