Enhancing Mn Emission of CsPbCl3 Perovskite Nanocrystals via Incorporation of Rubidium Ions

Mn doped cesium lead halide perovskite nanocrystals (NCs) have potential application for white light emitting diodes. However, the emission of doped NCs is limited to trap-mediated energy transfer. The Mn doped CsPbCl3 NCs with corporation of rubidium (Rb+) ions (Mn:Cs1-xRbxPbCl3NCs, x = 0, 0.1, 0.2, 0.3, and 0.4) were synthesized. The effect of the optical and structural properties of Mn:Cs1-xRbxPbCl3NCs were studied by steady-state and time-resolved photoluminescence spectroscopy. The photoluminescence quantum yields and lifetimes of Mn doped CsPbCl3 NCs with different Rb+ contents were obtained. It was found that the Mn doped CsPbCl3 NCs with Rb+ content of 0.1 exhibited the highest Mn2+ emission quantum yield up to 63.18%. Interestingly, the temperature-dependent PL spectra demonstrated the enhanced Mn2+ emission of Mn doped CsPbCl3 NCs at low temperature of 80 K. The experimental result indicated the Mn2+ emission of Mn doped CsPbCl3 NCs was enhanced by incorporating Rb+ ions.

Automated summary

This study investigated the optical and structural properties of Mn-doped cesium lead halide perovskite nanocrystals with the incorporation of rubidium ions. It was found that the Mn2+ emission quantum yield was highest at 63.18% with a Rb+ content of 0.1, and the emission was significantly enhanced at low temperature. Incorporating Rb+ ions enhanced the Mn2+ emission of the Mn-doped nanocrystals.