Visible Light Activated Organic Room-Temperature Phosphorescence Based on Triplet-to-Singlet Forster-Resonance Energy Transfer

Stimuli-responsive room-temperature phosphorescence (RTP) materials have drawn widespread attention in information encryption, sensors, and bio-imaging. In this work, a photoactivated organic RTP material through triplet-to-singlet Forster-resonance energy transfer (TS-FRET) inhibited by visible-light stimulation is reported. A stable phosphorescence energy donor and a fluorescent dye sensitive to visible light as the energy acceptor are doped into polyvinylpyrrolidone (PVP) polymer matrix to construct an amorphous organic RTP system. Due to the photodegradation characteristic of the energy acceptor, the phosphorescence intensity of the energy donor increases visually upon irradiation with visible light. This study provides a novel strategy to design stimuli-responsive organic RTP materials.

Automated summary

This work presents a photoactivated organic room-temperature phosphorescence material, which utilizes triplet-to-singlet Forster-resonance energy transfer (TS-FRET) inhibited by visible-light stimulation. By doping a stable phosphorescence energy donor and a visible light-sensitive fluorescent dye into a polymer matrix, an amorphous organic RTP system is constructed. The phosphorescence intensity of the energy donor increases upon irradiation with visible light due to the photodegradation of the energy acceptor.