Hour‐Level Persistent Multicolor Phosphorescence Enabled by Carbon Dot‐Based Nanocomposites Through a Multi‐Confinement‐Based Approach

are demonstrated for anti-counterfeiting, long-duration phosphorescence imaging, and fingerprinting. This synthetic strategy is expected to provide strong technical support for the preparation of persistent RTP CDs and pave the way for the synthesis of persistent RTP CDs in the future.