Ultrastable and colorful afterglow from organic luminophores in amorphous nanocomposites: advanced anti-counterfeiting and in vivo imaging application

Photo-induced ultralong phosphorescence of carbon dots for thermally sensitive dynamic patterning

“…Ultralong room temperature phosphorescent (URTP) materials with luminescence lifetime exceeding 100 ms have garnered intense research interest in recent years. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] The long aerglow emission (lasting for seconds to hours aer excitation) of these materials provides time-resolved optical information with an outstanding signal-to-noise ratio, which endorses their vast applications in different elds including optical encryption and anti-counterfeiting, [1][2][3][12][13][14][15][17][18][19] illumination/display, 9 bioimaging, 4,11 etc. Compared to their inorganic counterparts, organic URTP materials like molecular crystals or amorphous polymer composites show signicant advantages such as lower cost, better processability and environmental friendliness.…”

A metal-free 2D layered organic ammonium halide framework realizing full-color persistent room-temperature phosphorescence

“…The Ф P of HLC-NAAC is 5.1% which is longer than that of most of UOP materials with lifetime larger than 1s. 3,7,[33][34][35][36] Interestingly, a white emission was found when excited HLC-NIAC with a 365 nm of UV light. The white emission is originated from the matched fluorescence and phosphorescence with comparable intensity at 470 nm and 586 nm, respectively (Fig.…”

Luminescence anti‐counterfeiting: From elementary to advanced

“…The anti‐counterfeiting labels in multilevel luminescence anti‐counterfeiting can change more than two times under the regulation of excitation light, luminescence lifetime, heat stimuli, chemical reagents, mechanical force, and so on. Based on the category of regulation factors, multilevel luminescence anti‐counterfeiting can be divided into five types: (1) regulated by excitation light; [ 64–80 ] (2) co‐regulated by excitation light and luminescence lifetime; [ 81–92 ] (3) co‐regulated by excitation light and heat stimuli; [ 35,63,93–96 ] (4) co‐regulated by excitation light and chemical reagents; [ 16,97–105 ] and (5) co‐regulated by other factors. [ 106–121 ]…”

“…Similarly with luminescence anti‐counterfeiting regulated by excitation light, the luminescence anti‐counterfeiting co‐regulated by excitation light and luminescence lifetime can also be realized by tuning excitation wavelength, [ 81,82,84,85,87–89 ] irradiation time, [ 83 ] and irradiation mode. [ 86 ] But differently, only one kind of excitation light can also realize multilevel luminescence anti‐counterfeiting due to the introduction of temporal dimension.…”