Enhanced stability of CsPbBr3 Quantum Dots by anchoring on the hierarchical three-dimensional layered double hydroxide

The poor stability of all-inorganic perovskite quantum dots (QDs) limits its application in the field of optoelectronics although it possesses prominent luminescent properties. Herein, we proposed a selective nucleation-growth strategy through anchoring the CsPbBr 3 QDs on the aminated hierarchical three-dimensional layered double hydroxide (A3D-LDH). The strong interaction between the amino group and Pb 2+ endows the anchoring effect of A3D-LDH. Coordinated with the isolation effect of flower-like structure, the A3D-LDH/CsPbBr 3 composites exhibited high solid photo-luminescence quantum yield (82.35%) and enhanced stability against the adverse environment (humidity air, irradiation, and heat), which is attributed to restricted aggregation and surface passivation of CsPbBr 3 QDs. Benefiting from the advantageous properties, an efficient white light-emitting diode (LED) is fabricated by introducing A3D-LDH/CsPbBr 3 composites as green phosphors with color coordinates (0.349, 0.349) at a correlated color temperature of 4841 K. We believe that our method offered a promising candidate for solid-state lighting and display.