UV‐Curable Perovskite Nanocrystal Inks Integrated with Distributed Bragg Reflectors for Blue‐To‐Green and Blue‐To‐Red Photoconversion

Abstract Metal halide perovskite nanocrystals (NCs) offer efficient color conversion for full‐color light‐emitting diode (LED) based displays, but formulating high‐content luminescent NC inks for optimal inkjet printing remains a challenge. In this work, two highly concentrated inks based on polymerizable isobornyl acrylate (IBOA) and CsPbBr 3 or CsPbI 3 perovskite NCs are introduced, exhibiting pure green (528 nm) and pure red (643 nm) emissions with narrow linewidths. Both inks demonstrate photoluminescence quantum yields exceeding 92%, alongside excellent UV‐curability and printability for color conversion layers. When integrated with an optimized Ti 3 O 5 /SiO 2 distributed Bragg reflector, these color conversion layers achieved photoconversion efficiencies of 59.8% (blue‐to‐green) and 48.8% (blue‐to‐red), positioning them as attractive components in combination with blue micro‐LED backlights.