Printable Off–On Thermoswitchable Fluorescent Materials for Programmable Thermally Controlled Full‐Color Displays and Multiple Encryption

• DOI: 10.1002/adma.202008055
• Publication Date: 2021-04-08T05:08:14Z
• Authors: Jiahui Du; Lan Sheng; Yuan Xu; Qiaonan Chen; Chang Gu; Minjie Li; Sean Xiao‐An Zhang
• Keywords: Full color; Information display

Abstract Thermoswitchable fluorescent materials (TFMs) have received special attention due to their unique colorimetric responses temperature. Conventional TFMs generally display unicolor with switching from one color another, showing unprintable and unsatisfied performances. These limitations greatly hinder development expansion toward advanced applications. Herein, the superior integration of full‐color, off–on mode, printability, high performance is achieved successfully. The success a thermally induced synchronous “dual/multichannel” stimulus–response mode regulated by self‐crystalline phase‐change material; that is, synergistic changes molecular existence states subsequent colors/spectra modifier fluorophores, accompanied corresponding high‐efficiency on–off Förster resonance energy transfer. are simple prepare show good performance, such as fluorescence emission contrast (>100), great reversibility (>200 cycles), easy‐to‐adjust response Particularly, these R/G/B can be prepared tricolor inks, thus full‐color emissions on flexible substrate easily obtained printing. Finally, potential in switchable dynamic interior decoration, programmatic temperature‐control information display, senior encryption illustrated. This successful exploration offers new perspective for designing optimizing various other higher comprehensive