Angle-resolved photoemission spectroscopy (ARPES), with its exceptional sensitivity to both
the binding energy and the momentum of valence electrons in solids, provides unparalleled …

Triplet states have been widely studied in phosphorescent molecules, lanthanide complexes
and triplet–triplet annihilation systems, in which they have a critical role in energy transfer …

The functional properties of organic semiconductors are defined by the interplay between
optically bright and dark states. Organic devices require rapid conversion between these …

Dynamically populating triplet excitons under external stimuli is desired to develop smart
optoelectronic materials, but it remains a formidable challenge. Herein, we report a …

Excitons are realizations of a correlated many-particle wave function, specifically consisting
of electrons and holes in an entangled state. Excitons occur widely in semiconductors and …

Singlet exciton fission in organic chromophores has received much attention during the past
decade. Inspired by numerous spectroscopic studies in the solid state, there have been …

Nonradiative exciton relaxation processes are critical for energy transduction and transport
in optoelectronic materials, but how these processes are connected to the underlying crystal …

Semiconductor interfaces are at the heart of the functionality of many devices for opto-
electronic applications. At these interfaces, the importance of ultrafast dynamics–processes …

An accurate treatment of electronic spectra in large systems with a technique such as time-
dependent density functional theory is computationally challenging. Due to the Nyquist …

Excitons–two-particle correlated electron-hole pairs–are the dominant low-energy optical
excitation in the broad class of semiconductor materials, which range from classical silicon …