Different types of single organic white‐light‐emitting molecules and their light‐emitting devices are summarized. The blue and complementary emissions are ascribed to the monomers of molecules and their intra‐ or intermolecular interactions, respectively. The devices based on these molecules exhibit high efficiencies and color stabilities, affording a convenient approach to light up the white organic light‐emitting diodes.

The immense threat of low‐quality drugs to millions of patients is considered to be an under‐addressed global health challenge. In addition to analytical authentication technologies, “in‐drug labeling,” including printing or encrypting, as well as microscopic, nanoscopic, and molecular tags, may become powerful tools to protect drugs from counterfeiting.