AI Article Synopsis
- The instability of red perovskite nanocrystals (PeNCs) has been a major barrier for their use in patterning applications.
- A new dual-ligand passivation strategy was developed to enhance the stability of PeNCs and prevent halogen ion migration during high-voltage EHD inkjet printing.
- This method produced high-emission, stable red arrays and enabled successful creation of single-color and tricolor layers with impressive resolution, demonstrating potential for use in near-eye micro-LED displays.
Article Abstract
The lack of stability of red perovskite nanocrystals (PeNCs) remains the main problem that restricts their patterning application. In this work, the dual-ligand passivation strategy was introduced to stabilize PeNCs and inhibit their halogen ion migration during high-voltage electrohydrodynamic (EHD) inkjet printing. The as-printed red arrays exhibit the highest emisson intensity and least blue shift compared with samples with other passivation strategies under a high electric field during EHD inkjet printing. Combining with blue and green PeNC inks, single-color and tricolor color conversion layer arrays were successfully printed, with minimum pixel size of 5 μm and the highest spatial resolution of 2540 dpi. The color coordinate of CsPbBrI NCs arrays are located close to the red point, with a color gumat of 97.28% of Rec. 2020 standard. All of these show great potential in the application of color conversion layers in a near-eye micro-LED display.
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| http://dx.doi.org/10.1021/acs.nanolett.3c04927 | DOI Listing |
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