Nanomaterials for Polymer and Perovskite Light-Emitting Diodes

Abstract This chapter focuses on summarizing the deliberate applications of various materials for polymer and perovskite light-emitting diodes (PLEDs and PeLEDs). Distinct similarities exist between PLEDs and PeLEDs, such as the wet-processed fabrication method, device structure, and application areas in RGB displays and lighting. Nevertheless, due to the dissimilarity of film formation and photophysical properties for polymers and perovskites, the detailed material design work is different. For polymers, singlet/triplet harvest tactics are important, stimulating the exploration of diverse materials, including fluorescent, phosphorescent, hybrid, and thermally activated delayed fluorescent polymers. For perovskites, attempts have focused on the polycrystalline ABX 3 structure that control stoichiometric ratio, element component, and crystal dimensions, which facilitates the formation of radiative excitons in perovskites and produces high-quality perovskite film. The promising perovskite quantum dot scaffold is also introduced because of its peculiarity in convenient synthesis and huge advantages in high exciton-binding energy for efficient PeLEDs.