Direct digital light processing for patterning stability-enhanced encapsulated perovskite quantum dots

Perovskite quantum dots (PQDs) possess remarkable optoelectronic properties, making them ideal candidates for advanced display technologies. Nevertheless, their poor environmental stability limits their application in precisely patterned optoelectronic devices. Conventional patterning methods such as photolithography, inkjet printing, and laser direct writing suffer from issues related to resolution, material compatibility, and degradation. Here, we present a one-step direct patterning strategy based on Digital Light Processing (DLP) technology for fabricating high-resolution, stable PQD patterns. Silane-encapsulated CsPbX₃ (X = Cl, Br, I) quantum dot resins enhance the processability and long-term stability of PQDs, retaining 88.4 % of their initial luminescence after 30 days in water and over 94.7 % after 6 months in air. This method paves the way for the fabrication of complex patterned perovskite-based devices, making it suitable for applications in diverse integrated optoelectronic devices.