Thermally stable luminescence of Mn2+ in Mn doped CsPbCl3 nanocrystals embedded in polydimethylsiloxane films

Abstract

Mn2+ doped CsPbCl3 nanocrystals (NCs) have exhibited promising applications in the field of solid state lighting. Their thermal stability at elevated temperature should be particularly considered when they come into commercial use. Here, we reported the thermally stable luminescence of Mn2+ in Mn doped CsPbCl3 NCs embedded in polydimethylsiloxane (PDMS) films. The luminescent properties of Mn:CsPbCl3 NC/PDMS films under various heat treatment temperatures for different time were studied by steady-state and time resolved photoluminescence (PL) spectroscopy. It was found that the Mn:CsPbCl3 NC/PDMS films had more thermally stable PL of Mn2+ at temperatures of 80 and 100 °C than the pure NC films. The embedding of Mn:CsPbCl3 NCs into PDMS was considered to significantly avoid the growth of the NCs, resulting in reduced nonradiative recombination centers. The Mn:CsPbCl3 NC based light emitting diodes were fabricated by combining with green emitting Cu:ZnInS/ZnS NCs to obtain a white emission.