Deep-red electro-fluorescence based on an excimer emission with hot-exciton channels

Abstract

Red and deep-red fluorescent materials are broadly applied in many fields such as organic light emitting diodes (OLEDs), biological imaging and night-vision devices. In this work, we designed and synthesized...

Survey of Recent Advances in Molecular Fluorophores, Unconjugated Polymers, and Emerging Functional Materials Designed for Electrofluorochromic Use

“…In a similar manner, Y. Gao et al synthesized two deep-red emitters: AD2a and AD2b . While the emitters had a low Φ fl , namely, 4% ( AD2a ) and 9% ( AD2b ), appending a nitrile group to the conjugated system improved the Φ fl [ 80 ]. The obtained increased emission was produced by an aggregation-induced emission effect (vide infra) resulting from hydrogen bonding between two separate molecules of AD2b .…”

Excited-State Descriptors for High-Throughput Screening of Efficient Electro-Fluorescent Materials

“…However, the IQE in these hot exciton materials is still far from the upper limitation of 100% because the EUE and PLQY cannot reach 100% simultaneously (see Figure S1). ,− Namely, these empirical rules hardly produce an excellent IQE for hot exciton materials, owing to the rudimentary understanding of the EUE and PLQY. Therefore, it is urgent to unravel the underlying mechanisms and establish theoretical rules to promote the IQE of hot exciton materials.…”

Theoretical study on the mechanism of hot excitons combined with aggregation-induced emission in efficient red fluorescent molecules

“…Several hundred materials with HLCT states have been synthesized and reported, which also show high photoluminescent quantum yield (PLQY) and EUE. 8–14…”

“…Several hundred materials with HLCT states have been synthesized and reported, which also show high photoluminescent quantum yield (PLQY) and EUE. [8][9][10][11][12][13][14] Due to the limitations of current research methods, in recent years, most theoretical studies of HLCT state luminescent molecules have been concentrated in a vacuum or solvent. In real devices, however, the molecules exist in solid-state films.…”