Metal‐Free Triplet Phosphors with High Emission Efficiency and High Tunability

Abstract

Design of highly efficient phosphorescent emitters based on metal- and heavy atom-free boron compounds has been demonstrated by taking advantage of the singlet fission process. The combination of a suitable molecular scaffold and appropriate electronic nature of the substituents has been utilized to tailor the phosphorescence emission properties in solution, neat solid, and in doped PMMA thin films.

Tailoring Oxygen Sensitivity with Halide Substitution in Difluoroboron Dibenzoylmethane Polylactide Materials

“…For example, Venkatesan et al successfully generated β–ketoiminates that exhibited phosphorescence across the visible spectrum at different concentrations in CH 2 Cl 2 and poly(methyl methacrylate) (PMMA) environments. 11 In the solid-state, dye structure is critical in determining how dye-dye interactions influence material optical properties. Phenyl-phenyl systems (BF 2 dbmPLA) reached a maximal blue-shifted fluorescence at a MW of ~20 kDa, which corresponded to about 1% dye by total mass; further dilution did not affect the fluorescence color significantly.…”

Recent progress of optical functional nanomaterials based on organoboron complexes with β-diketonate, ketoiminate and diiminate

“…[39][40][41][42] By grinding powder samples in the crystal state, materials typically convert into the amorphous state; the resulting molecular distribution would thus be randomized, and the degree of intermolecular interactions should be significantly different. As a result, changes in emission color or intensity can thus be observed.…”

White-light emission from a single heavy atom-free molecule with room temperature phosphorescence, mechanochromism and thermochromism

“…1 With regards to white-light emission the majority of the documented materials rely on employing multiple cooperating emitters to create at least dual complementary colors ( e.g. blue and yellow) to cover the entire visible spectral region.…”