Evoking ultra-long molecular room temperature phosphorescence of pure carbazole derivatives

Rational molecular and doping strategies to obtain organic polymers with ultralong RTP

“…Moreover, the effect of comparable-structure dopants and material aggregates on organic RTP properties is incompletely understood. 1,20,22–24…”

“…Moreover, the effect of comparablestructure dopants and material aggregates on organic RTP properties is incompletely understood. 1,20,[22][23][24] We are interested in whether RTP lifetimes can be advanced to a higher level and the mechanism of such advancement. Considering the prominent roles played by aromatic boronic acids and carbazole units in ultralong organic-doped RTP polymers, we intended to develop boronic acid-containing Nphenyl-carbazoles as dopants because the coexistence of boron and nitrogen is conducive to inter-system crossing.…”

Polymer-Based Long-Lived Phosphorescence Materials over a Broad Temperature Based on Coumarin Derivatives as Information Anti-Counterfeiting

“…Among them, the advantages of RTP materials over inorganic materials , are wide variety, rich source, good processability, excellent environmental and thermal stability, variable properties, and low cost. − However, owing to the instability of the excited triplet state and the weak spin–orbit coupling (SOC), organic materials are readily inactivated by oxygen, vapor, and thermal vibration . To obtain a pure organic component with long-lived and high luminescent efficiency, a set of feasible methods based on the design of organic molecular structure and other performance enhancement strategies, such as doping in rigid matrixes, − crystallization engineering , and host–guest interactions, and so on, , have been developed to suppress nonradiative, facilitate SOC, or boost the intersystem crossing (ISC) . In recent years, the major strategies for developing RTP materials have been to synthesize and discover new chromophore molecules.…”

Water-soluble polymers with aggregation-induced emission and ultra-long room temperature phosphorescence

“…16,17 Phosphorescent materials have great potential application due to their continuous light-emitting property, which has attracted extensive attention from researchers. [18][19][20][21] Phosphorescence usually occurs in rigid substrates at 77 K, but less at room temperature. This phenomenon is mainly due to the instability of triplet excitons, which are quenched by oxygen, humidity, and thermal motion.…”