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      • Full-Colored Micron-Scale Photopatterning of Perovskite Nanocrystals

        고재완,마경연,방준하 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1

        Perovskite nanocrystals (PNCs) are a class of nanomaterials with superb color purity and high luminous efficiency. Despite many promising properties, There are still many remaining issues to integrate PNCs in real devices, such as i) enhancing poor stabilities and ii) devising efficient micro-patterning technology for high-resolution display. Herein, we report functional polymer encapsulated PNCs which enable us to demonstrate stable, full-colored, and high-definition patterns. Specifically, polymer ligands contain photo-cross likable cinnamoyl group on the backbone, and terminal ammonium halide group which can effectively passivate defect sites on the PNC. As a result, PNCs exhibited not only better optical properties but also improved stability. Furthermore, RGB microarrays with high pixels per inch (PPI) value of ~ 465 are successfully fabricated. We believe our patterning technique significantly contribute to the commercialization of PNCs in the field of next-generation display.

      • Multicolor Patterning of Perovskite Nanocrystals for High Resolution Display

        고재완,마경연,방준하 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2

        Patterns with high reliability, uniformity, and fine resolution has continuously been demanded for various optoelectronic devices. However, structural lability of perovskite nanocrystals always hinders them from being integrated into real device operation. Herein, we report patternable perovskite nanocrystals with high stability by introducing functional polymer ligand. By appplying low dosage of 365 nm UV, full-colored pattern arrays were fabricated with extremely high resolution (~465 PPI). This work present a promising strategy for designing sophisticated optoelectronic devices based on perovskite nanocrystals.

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