Efficient deep-blue LEDs based on colloidal CsPbBr₃ nanoplatelets meeting the Rec.2020 standard.

ABSTRACT: Colloidally quantum-confined CsPbBr₃ nanoplatelets (NPLs) exhibit narrow emission linewidths and thickness-tunable photoluminescence, making them ideal candidates for deep-blue perovskite light-emitting diodes (PeLEDs). However, the weak surface coordination of conventional long-chain ligands (e.g., oleylamine and oleic acid) leads to face-to-face stacking of the NPLs, resulting in undesirable emission redshifts in their PeLEDs. Herein, we report an efficient deep-blue PeLED based on colloidal CsPbBr₃ NPLs that meet the Rec.2020 color standard, enabled by an acid-assisted ligand passivation strategy. Surface chemical analysis reveals that hydrobromic acid facilitates proton-assisted stripping of the long-chain ligands, followed by the formation of stable Pb-S-P coordi

SUBMITTER: Song Y 

PROVIDER: S-EPMC12454636 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature