The Polymer Society of Korea

Abstract

As the demand for high-resolution displays based on colloidal quantum dots (QDs) and perovskite nanocrystals (PNCs) increases, achieving both long-term stability and precise patternability has become a critical challenge. In this work, we present a versatile strategy to enhance the physicochemical durability and processability of these nanocrystals by employing multifunctional photocrosslinkable polymer ligands. The polymer backbone contains a cinnamoyl group that has been widely employed as a photocrosslinker under 365 nm UV irradiation. Also, the terminal group is readily adjustable between NH₃Cl, NH₃Br, and NH₃I, allowing us to obtain multicolored PNCs via instant anion exchange. Using anion exchanged PNCs, RGB microarrays with a subpixel size of 10 mm × 40 mm were successfully demonstrated. This universal patterning strategy, combining cost-efficiency with superior stability, offers a promising framework for the fabrication of diverse next-generation optoelectronic devices.