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Ionic bonds have potential in enhancing organic phosphorescence, but often precise molecular design is required. Here, the authors report the use of ionic alkyl chain hosts for the preparation of ionic phosphorescent materials, with the chromophores having quaternary ammonium groups added.

Long-lived room temperature phosphorescence (LRTP) is important in organic photonics but exploring a universal approach to obtain LRTP in amorphous polymers is challenging. Here the authors present a facile chemical strategy to achieve ultralong phosphorescence in polymers by ionic bonding cross-linking.

The monolayer transition-metal dichalcogenide molybdenum disulphide has recently attracted attention owing to its distinctive electronic properties. Cao and co-workers present numerical evidence suggesting that circularly polarized light can preferentially excite a single valley in the band structure of this system.

Sustainable afterglow room temperature phosphorescence (RTP) Structural materials are difficult to achieve. Here, the authors demonstrate a wood based RTP material by oxidation of lignin to realize an afterglow RTP material with a lifetime of ~ 408 ms.

Despite great success in generation of ultralong organic phosphorescence (UOP) by suppressing non-radiative transitions through attractive interactions, consideration of repulsive interactions on UOP remains largely unexplored. Here, the authors introduce carboxyl groups into organic phosphors, enabling formation of the intense repulsive interactions between the isolated molecules and the matrix in rigid environment.

A strategy to confine phosphorescent organic chromophores within ionic crystals proves effective in suppressing non-radiative recombination channels and increasing the phosphorescence efficiency of blue-emitting heavy-atom-free emitters.

Organic, metal-free materials that act as efficient X-ray scintillators could bring new opportunities for X-ray imaging.

Architected materials can have enhanced properties compared to bulk but are difficult to design. Here the authors propose a machine-learning-based pipeline to design architected materials with predetermined elastic modulus and enhanced yield strength and test it in additive manufacturing.

Tunable afterglow emission in the visible region is enabled by trap-induced persistent luminescence in organic host–guest materials, with controllable trap depths.

In thermally stimulated phosphorescent materials a thermal stimulus inevitably quenches the emission due to intensive non radiative transition. Here, the authors report an abnormal thermally stimulated phosphorescence behavior in organic phosphors and show enhancement of phosphorescence and change of the emission color upon temperature increase.

Functional materials displaying tunable emission and long-lived luminescence are a powerful tool in information encryption, organic electronics and bioelectronics. Here the authors design a color-tunable ultralong organic room temperature phosphorescence polymer through radical multiple component cross-linked copolymerization.