Energy-level modification of perovskite nanocrystals by dipole ligand treatment for green light-emitting diodes

Dipole ligands are used to modify the perovskite NCs surface, thus tailoring their energy level. LEDs exhibit significantly improved performance, with maximum luminance increasing from 31 145 to 64 383 cd m −2 and EQE increasing from 5.72 to 8.77%.