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 …

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

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 …

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

The role of charge transfer states in multi-exciton mechanisms has recently become a point
of discussion due to the difficulty associated with modeling their contributions accurately …

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 …

Understanding the impact of spatial heterogeneity on the behaviour of two-dimensional
materials represents one of the grand challenges in applying these materials in …

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 …

Singlet fission (SF) is a photophysical process in which a high energy photon is absorbed by
one chromophore of an adjacent electronically coupled pair and converted into two lower …

Many fundamental processes in nature occur on ultrashort time scales within picoseconds to
attoseconds, and on intrinsic length scales from nanometers to picometers. The structure of …