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The development of exciplex-type hosts for thermally activated delayed fluorescence organic light-emitting diodes is hindered by a lack of structural information for these donor:acceptor blends. Here, the authors report the pump-probe Step-Scan Fourier transform IR spectra for a D:A exciplex host.

Room temperature phosphorescence (RTP) is a topic which is currently widely studied, but a study on the correlation between types of molecular solid and RTP properties is lacking. Here the authors show that RTP is enhanced in the racemic form of axial chiral molecules due to its denser R- and S- cross packing arrangement.

Detailed knowledge of the water environment within proteins may lead to an increased understanding of protein folding and function. Here the authors present a tryptophan analogue with remarkable water catalysed proton-transfer properties that may be exploited for site-specific water sensing.

Direct conversion of solar energy to stored chemical energy can be achieved through photoisomerization. Here, authors exploit thermally activated delayed fluorescence materials as a photosensitizer and signal transducer to harness solar energy, to maximize solar spectrum harvesting without sacrificing energy storage time.

The low photoluminescence quantum yield of near-infrared (NIR) emitters has limited their application in organic light-emitting diodes (OLEDs). Here, authors realize NIR OLEDs through interfacial energy transfer from platinum(II) complexes to a non-fullerene acceptor based on a sandwiched structure.

Pt(ii) complexes allow the fabrication of efficient near-infrared organic light-emitting diodes that operate beyond the 900 nm region.

Although exciplex-forming systems are widely used for fabricating organic light-emitting diodes (OLEDs), their structural and thermodynamic characterization is limited. Now donor/acceptor inclusion complexes that demonstrate thermally activated delayed fluorescence have been generated. Their cocrystal structures have been resolved and the thermodynamics of exciplex formation determined, which has enabled the fabrication of efficient OLEDs.

The rotation of a carbon double bond in an alkene can be efficiently accelerated by creating the high strain ground state and stabilizing the transition state of the process. Here, the authors report the synthesis, structures, and properties of several highly twisted alkenes.

A new series of self-assembled Pt(II) complexes with high emission quantum yields enables OLEDs with a maximum emission wavelength of 995 nm and an external quantum efficiency of 4.3%.

This study reveals the importance of host–guest interactions for effective multiple-resonance thermally activated delayed fluorescence in organic light emitters.

New design of Pt(II) phosphors yield near-infrared organic light-emitting diodes with high efficiency and brightness.

This Review describes excited-state intramolecular proton-transfer (ESIPT) reactions with amines as proton donors. Systematic variation of N−H bond strength, acidity and reaction rate enables ESIPT kinetics and thermodynamics to be correlated and new molecules to be designed for sensing and optoelectronics applications.

Developing green-emitting InP quantum dot light-emitting diodes (QLED) is lagging behind their red and green counterparts. Here, green InP quantum dots are prepared and incorporated into a QLED so to promote hole transport and reduce electron mobility, resulting in a maximum quantum efficiency of 16.3 %.

The coupling between excited state intramolecular proton transfer and excimer formation is a phenomenon of fundamental importance but rarely observed. Here the authors observe this interaction in thiazole based organic crystals using a combination of steady-state and time-resolved spectroscopic techniques.