Surface engineering of ZnO nanocrystals with conjugated polyelectrolytes tethering different counterions for inverted PeLEDs

Fu-Bing Chiu; Sheng-Hsiung Yang

doi:10.1117/12.3009749

18 June 2024 Surface engineering of ZnO nanocrystals with conjugated polyelectrolytes tethering different counterions for inverted PeLEDs

Fu-Bing Chiu, Sheng-Hsiung Yang

Author Affiliations +

Proceedings Volume 13015, Photosensitive Materials and their Applications III; 1301511 (2024) https://doi.org/10.1117/12.3009749
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

The bromide (Br) ions on a conjugated polyelectrolyte (CPE) PFN-Br were converted to tetrafluoroborate (BF₄) or hexafluorophosphate (PF₆) ions through anion exchange to obtain two polymers PFN-BF₄ or PFN-PF₆ for surface engineering 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) NCs emitters and therefore promote luminescent properties of inverted perovskite light-emitting diodes (PeLEDs). The incorporation of CPEs also helped to passivate the defects of ZnO NCs films, improve contact between ZnO and perovskite layers, and prolong carrier lifetime of CsPbBr₃ NCs. PeLEDs based on different CPEs were fabricated and evaluated.

Conference Presentation

Citation Download Citation

Fu-Bing Chiu and Sheng-Hsiung Yang "Surface engineering of ZnO nanocrystals with conjugated polyelectrolytes tethering different counterions for inverted PeLEDs", Proc. SPIE 13015, Photosensitive Materials and their Applications III, 1301511 (18 June 2024); https://doi.org/10.1117/12.3009749

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