Synthesis and optical properties of doped CsPbCl3 nanocrystals

Tb, Mn, and Br ions are introduced to CsPbCl3 to prepare doped CsPbCl3 nanocrystals by hot injection method. The prepared doped CsPbCl3 nanocrystals are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and photoluminescence (PL) techniques to study the structural, morphological, and optical properties. The structure is not influenced by doping, which is confirmed by XRD data. Tb doping leads to larger particle sizes compared to undoped CsPbCl3 nanocrystals (8 nm 12 nm). However, the Mn and Br doping does not affect the sizes that much. The optical properties of CsPbCl3 nanocrystals can be controlled by doping. Green emission at 543 nm from Tb is observed for CsPbCl3:Tb nanocrystals. Red emission at 590 nm is obtained for Mn doping. Controlled exciton emission from CsPbCl3 is achieved by Br doping. The influence of Mn doping on the PL of CsPbCl3Br3-x is also investigated.