Surface Modification of ZnO Nanocrystals with Conjugated Polyelectrolytes Carrying Different Counterions for Inverted Perovskite Light-Emitting Diodes.

ABSTRACT: In this work, bromide ions (Br^-) on the conjugated polyelectrolytes (CPEs) were converted to tetrafluoroborate (BF₄^-) or hexafluorophosphate (PF₆^-) ions through anion exchange. The three CPEs (PFN-Br, PFN-BF₄, and PFN-PF₆) were utilized solely for surface modification of zinc oxide nanocrystals (ZnO NCs). The ionic groups on CPEs can form permanent dipoles to facilitate charge injection from ZnO NCs to cesium lead bromide (CsPbBr₃) NC emitters, therefore promoting luminescent properties of inverted perovskite light-emitting diodes (PeLEDs). The experimental results reveal that ZnO NC films were smoothened by CPEs that allowed flat deposition of the perovskite active layers; moreover, the improved contac

SUBMITTER: Chiu FB 

PROVIDER: S-EPMC10233845 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature