Ton‐Scale Industrial Optical Polycarbonate Film: Combining Full‐Color Phosphorescence and Various Photochromic

Abstract Polymer Polycarbonate (PC) is widely used in fields such as electronics, automobiles, building materials, and packaging is one of the most common plastics in human life. Herein, PC is used as the host to achieve doped films with both phosphorescence and photochromic properties. Importantly, the PC host has very excellent universality, can be paired with dozens of phosphorescence guests and a series of photochromic guests, achieving full‐color phosphorescence emission from blue to red, as well as rapid, sensitive, and reversible transitions from colorless to pink, red, or blue–purple. More surprisingly, compared to the thirteen commonly used host matrices, extensive data show that PC ‐based doped materials have the best phosphorescence and photochromic properties, meaning that PC is the optimal host among them. Finally, large‐scale industrial preparation of doped film is achieved at the ton level, and the prepared doped film still has excellent optical properties, which can be directly used for product packaging. This work not only discovered that PC polymer is an excellent and overlooked host matrix, but also developed optical functional materials with direct commercial application value.