Blue-to-green manipulation of carbon dots from fluorescence to ultralong room-temperature phosphorescence for high-level anti-counterfeiting

Time‐ and Excitation Wavelength‐ Dependent Afterglow Supramolecular Assembly for Multi‐Modal Anti‐Counterfeiting Application

“…As displayed in Video S19 – S20 and Figure 4b, four numbers use A 1 B 4 @ Lap , A 2 B 3 @ Lap , A 3 B 2 @ Lap and A 4 B 1 @ Lap samples respectively, which exhibited similar emission behavior under excitation sources of 254 nm and 302 nm. Such excellent excitation wavelength‐ dependent and time‐dependent features can enrich the encoding information in high‐level data encryption and anticounterfeiting application [51–55] …”

“…Such excellent excitation wavelength-dependent and time-dependent features can enrich the encoding information in high-level data encryption and anticounterfeiting application. [51][52][53][54][55]…”

Evolution and fabrication of carbon dot-based room temperature phosphorescence materials

“…Realizing the final application is the value of a material. 110,126,127,[144][145][146][147][148][149][150] information encryption, 113,115,118,119,121,123,128,[151][152][153][154][155][156][157][158][159][160] sensor detection, 114,124,129,130,147,[161][162][163][164][165][166][167][168][169][170][171][172][173][174] LEDs, [175][176][177][178]…”

“…It allows significantly increased time to visualize cell states, enables speedy detection, and also facilitates bioimaging and detection. Generally speaking, the RTP material based on CDs possesses huge application prospects in the field of anti-counterfeiting, 110,126,127,144–150 information encryption, 113,115,118,119,121,123,128,151–160 sensor detection, 114,124,129,130,147,161–174 LEDs, 175–179 biological imaging, 134,180,181 logic gates, 133 fluorescent ink 112,182–184 and other fields 116,117,122,185–195 with the properties of DF, TADF, long afterglow life and adjustable afterglow color.…”

Metal Ions as the Third Component Coordinate with the Guest to Stereoscopically Enhance the Phosphorescence Properties of Doped Materials

“…Organic room-temperature phosphorescence (RTP) materials with a long-afterglow phenomenon exhibit unique advantages in anticounterfeiting, biological diagnosis and treatment, and optoelectronic devices. − Intersystem crossing (ISC) of excitons and stable triplet excitons are prerequisites for organic materials to exhibit phosphorescence. − As an emerging technology in recent years, the guest–host doped strategy exhibits immense advantages in the construction of organic RTP materials, which has attracted considerable interest. − Not only can the host matrix help the energy transfer of guest excitons, but also the rigid structure of the host can effectively limit the motion of the guest molecules, thereby stabilizing the triplet excitons. − In addition, the low content of the guest reduces synthesis costs, abundant varieties broaden the doped systems, and the special interaction between the host and guest can optimize and regulate phosphorescence performance. − However, despite the rapid development of doped RTP materials, these systems are basically two-component systems, which are limited by low performance and limited functionality.…”