Comparative studies of optical absorption, photoluminescence and EPR spectra of PbMnI2 bulk layers and nanocrystals

Abstract

Abstract. We report a study of the layered diluted magnetic semiconductor (DMS) were prepared by cooling the boiling saturated aqueous solution to room temperature. The exciton structure of the absorption spectra of nanoparticles exhibits blue shift due to the quantum confinement effect. In photoluminescence spectra of nanocrystals, two main peaks were revealed, which are attributed to the band-edge transitions and defect states. The EPR spectra for bulk layers and nanocrystals consist of an intense broad line and several weak narrow lines that correspond to hyperfine spectra of Mn 2+ ions.