Synergistic Surface Modification for High-Efficiency Perovskite Nanocrystal Light-Emitting Diodes: Divalent Metal Ion Doping and Halide-Based Ligand Passivation.

ABSTRACT: Surface defects of metal halide perovskite nanocrystals (PNCs) substantially compromise the optoelectronic performances of the materials and devices via undesired charge recombination. However, those defects, mainly the vacancies, are structurally entangled with each other in the PNC lattice, necessitating a delicately designed strategy for effective passivation. Here, a synergistic metal ion doping and surface ligand exchange strategy is proposed to passivate the surface defects of CsPbBr₃ PNCs with various divalent metal (e.g., Cd²⁺ , Zn^2+, and Hg²⁺ ) acetate salts and didodecyldimethylammonium (DDA⁺ ) via one-step post-treatment. The addition of metal acetate salts to PNCs is demonstrated to suppress the defect formation energy effe

SUBMITTER: Jeong WH 

PROVIDER: S-EPMC10811502 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature