A Wireless‐Driven Electric Responsive Long‐Lived Room Temperature Phosphorescent Switching Device

Long‐lived room temperature phosphorescent (RTP) materials have prospective applications, but endowing long‐lived RTP materials with on‐off regulation property is challenging. Here, the first electric responsive long‐lived RTP switching device under photoexcitation with a wireless power transmission (WPT) system is demonstrated. It exhibits long persistent phosphorescence (180.1 ms for the film and 180.8 ms for the device) and excellent reversibility (>1000 cycles). Due to the effective dual‐state Förster resonance energy transfer (FRET) process from the triplet and singlet states of the chromophore donor to the singlet state of the dye acceptor, the devices exhibit switching characteristics. The appearance of the dye's absorption can be modulated by electro‐acid based on proton‐coupled electron transfer (PCET) mechanism, resulting in the device being electrically controlled. In addition, by integrating WPT coils outside the device, it can be driven wirelessly, thereby overcoming the reliance on electrical stimulation methods on the power supply. Finally, due to the multiple switching characteristics (color, fluorescence, phosphorescence) of this device, it is successfully applied in anti‐counterfeiting and information encryption.