Near?Infrared?Excited Multicolor Afterglow in Carbon Dots?Based Room?Temperature Afterglow Materials

Room-temperature afterglow (RTA) materials with long lifetime have shown tremendous application prospects in many fields. However, there is no general design strategy to construct near-infrared (NIR)-excited multicolor RTA materials. Herein, we report a universal approach based on the efficient radiative energy transfer that supports reabsorption from upconversion (UMs) carbon dots-based (CDAMs). Thus, emission (blue, cyan, green, and orange) of various CDAMs can be activated by UMs under NIR continuous-wave laser excitation. The ensured persistent up 7 s, 6 5 0.5 s naked eyes, respectively. Given unusual properties, demonstrated preliminary applications fingerprint recognition information security. This work provides new avenue for activation NIR-excited will greatly expand