Recently, The team of Cao Sheng & Zhao Jialong from SKL is entitled "Boosting photoluminescence efficiency and stability of Mn²⁺doped CsPbCl₃perovskite nanocrystals via europium ion codoping" was published in the Journal of Rare Earths.

Mn2+ doped CsPbCl3 (Mn2+:CsPbCl3) nanocrystals (NCs) have attracted considerable attention due to their unique strong and broad orange-red emission band, presenting promising applications in the field of photoelectric devices. However, pristine Mn2+:CsPbCl3 NCs commonly suffer from low photoluminescence quantum yield (PL QY) and stability issues. Herein, we introduced europium ions (Eu3+) into Mn2+:CsPbCl3 NCs via the thermal injection synthesis method to obtain high performance Eu3+ and Mn2+ codoped CsPbCl3 (Eu3+/Mn2+:CsPbCl3) NCs. The maximum PL QY of the resulting Eu3+/Mn2+:CsPbCl3 NCs reaches up to 90.92%. It is found that the doping of Eu3+ ions significantly reduces the non-radiative recombination caused by high defect states, and improves the energy transfer efficiency from exciton to Mn2+, thereby boosting the PL performance. Moreover, doping Eu3+ ions notably improves the UV-light and water stability of Mn2+:CsPbCl3 NCs. We further demonstrate the application versatility of Eu3+/Mn2+:CsPbCl3 NCs in white light emitting diodes (WLEDs) and optical anti-counterfeiting applications. This work provides a valuable perspective for the attainment of high performance Mn2+:CsPbCl3 NCs and lays a foundation for the codoping of other lanthanide ions to adjust the luminescence properties of Mn2+:CsPbCl3 NCs.