Guided by the above-mentioned principles, several organic RTP materials, such as molecular crystals , supramolecules , polymer composites , COF and MOF have been developed. These materials can be processed into RTP powders, films, liquids, structural materials and fibers . The latter have shown great potential and bottom-up approaches have been explored for their production via doping synthesized phosphors into polymeric fibers . For example, organic phosphors , perovskites , transition elements and sulfide materials can be doped in a polymer matrix to achieve photoluminescence in the respective optical fibers. However, these technologies suffer from costly and complex processing and mostly rely on resources based on fossil carbon.