The Polymer Society of Korea

Abstract

Perovskite quantum dots (QDs) have garnered significant interest as next-generation optoelectronic materials due to their exceptional color purity and tunable emission spectra. However, their practical application is often hindered by structural instability; the crystal framework undergoes rapid degradation upon exposure to ambient air and moisture, largely driven by under-coordinated surface sites and associated trap states. While previous studies have addressed these issues through metal doping or core–shell encapsulation, we herein suggest a straightforward yet highly effective alternative utilizing functional ligands as additives. By systematically employing X-type and L-type ligands focusing on the distinct coordination mechanisms of amino and thiol groups we achieve comprehensive passivation of surface defects. This study offers a versatile and scalable strategy for advancing the durability and performance of perovskite QD-based optoelectronics.