Inorganic Skeleton Assisted Explosive Nucleation for >45% Photoconversion Efficiency in Perovskite Quantum Dots Patterns

Micro‐light‐emitting diode (Micro‐LED) displays, distinguished by their superior brightness, expansive color gamut, and low energy consumption, constitute a significant advancement in next‐generation visual technologies. Among various approaches, quantum‐dot color conversion (QDCC) has emerged as a particularly promising method for achieving full‐color emission in these devices. Nonetheless, substantial challenges remain, including insufficient blue‐light absorption and limited photoconversion efficiency. In this study, we report the development of a high‐concentration (40 wt.%) perovskite quantum dots (PQDs) photoresist utilizing an acryloyloxypropyl‐functionalized polyhedral oligomeric silsesquioxane (A‐POSS) monomer. The A‐POSS matrix fulfills a dual role: its inorganic siloxane framework provides numerous heterogeneous nucleation sites that facilitate rapid nucleation and uniform PQD growth, while its rigid, cage‐like architecture imposes strong spatial confinement, effectively inhibiting PQD aggregation. The resulting PQD‐polymer composite film demonstrates exceptional blue‐light absorption of 98.45% and a photoconversion efficiency exceeding 45%. Moreover, high‐resolution red, green, and blue (RGB) pixel arrays were successfully fabricated through a direct in situ photolithography process. This work offers a practical and efficient strategy for producing high‐quality color conversion layers, thereby advancing the integration of QDCC‐based Micro‐LEDs in sophisticated display applications such as augmented and virtual reality (AR/VR).