Perovskite nanocrystals and quantum dots(QDs)have at-tracted great attention due to their potential in optical and optoelectronic applications,especially in ultra-high defini-tion displays because of their high purity of photo/electro-luminescence(PL/EL)[1,2].Although the external quantum efficiency(EQE)of light-emitting diodes(LEDs)based on perovskite quantum dots(PeQDs)has been over 20%[3,4],another key problem,the PL/EL stability,still remains open.