Fig. 5: Light-power-response RTP and application.
From: Photo-thermo-induced room-temperature phosphorescence through solid-state molecular motion
a Changes in the photothermal temperature of powdered p-Br-TRZ on increasing the power of 365 nm light from 0 to 516 mW/cm2 demonstrate a linear relationship between photothermal temperature and irradiation powder. b Three-dimensional plot of luminescence of p-Br-TRZ vs power of 365 nm light vs wavelength showing dynamics of enhancement of phosphorescence and phosphorescence/fluorescence intensity ratio on increasing irradiation power. c Corresponding 1931 CIE coordinate diagram of p-Br-TRZ with different power 365 nm irradiation, in accordance with (b). d Imprint lithography with luminescent dyes for a multilevel anticounterfeiting pattern. By modulating the irradiation light power (0→216→516 mW/cm2), different luminescence colors can be recorded; all letters were prepared using commercially available blue dye naphthalene except for “R” (p-Br-TRZ), “T” (m-Br-TRZ), and “P” (o-Br-TRZ).
