Fig. 4
From: Highly sensitive switching of solid-state luminescence by controlling intersystem crossing
High performance On–Off MRL properties of TPE-4N in thin-film state. a Luminescent and room-light transparent photos of TPE-4N thin film spin-coated on quartz plate and records of the writing and erasing processes, Process I: heated by a handed heat gun at 150 °C for 3 s; Process II: writing with a fine glass tube. Scale = 1 cm. b PL spectra of coated and annealed thin film. c Polarizing optical microscopic images of annealed, slightly scratched and recovered film under room light and UV light. Scale = 100 µm. d PL intensity contrast spectrum for the slightly ground film in c. All the luminescent photos were taken under UV irradiation at 365 nm
