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

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 CsPbBr₃ or CsPbI₃ 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 Ti₃O₅/SiO₂ 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.