UV-Curing Resin-Assisted Facile Synthesis of Lead-Free Zero-Dimensional Organic-Inorganic Hybrid Metal Halide Quantum Dots for Light-Emitting Application

Zero-dimensional (0D) organic-inorganic hybrid metal halides (OIMHs) have garnered significant attention due to their distinctive optoelectronic properties. Nevertheless, the straightforward synthesis of lead-free OIMHs quantum dots (QDs) remains a formidable challenge. In this study, we report the successful green synthesis of (Ph₄P)₂SbCl₅ (Ph₄P⁺ = tetraphenylphosphonium cation) QDs (average diameter of 8.3 nm) for the first time using a UV-curing resin-assisted antisolvent precipitation strategy, achieving a high photoluminescence quantum yield (PLQY) of 81.82%. The interaction between the UV-curing resin and (Ph₄P)₂SbCl₅ QDs was also described. Additionally, we have successfully synthesized (Ph₄P)₂MnBr₄ QDs colloidal solution (PLQY = 61.48%) using the same method to confirm our universal approach. The as-fabricated QDs colloidal solutions were physically mixed with additional UV-curing resin, and these mixtures were rapidly cured under 365 nm ultraviolet (UV) light irradiation, resulting in composite bulk characterized by substantial size, transparency, and flexibility. This study paves the way for the environmentally friendly synthesis of lead-free OIMHs QDs, facilitating their potential applications in solid-state lighting, display, inkjet printing, and other fields.