Kilogram‐Scale Fabricated Organic Long‐Persistent Luminescence Materials with Multi‐Level Temperature Response

Purely organic long-persistent luminescence materials (OLPLMs) have shown great application potential in the fields of anti-counterfeiting and information encryption, due to their eco-friendly preparation, low synthesis cost, and easy-to-tune luminescence. Notably, the development of efficient large-scale fabrication methods will facilitate the commercial application of OLPLMs. Here, we realized the kilogram-scale preparation of organic doped-crystals with different long-persistent luminescence durations by a facile water-based method under ambient conditions. Additionally, the function of reversible multi-level temperature response of LPL performance based on this kind of OLPLMs has been achieved, showing the unique application prospects in the field of anti-counterfeiting and information encryption. This work provides an effective strategy for large-scale fabrication of OLPLMs, and will accelerate the research and development of temperature-responsive OLPLMs.