Using light to control matter has captured the imagination of scientists for generations, as
there is an abundance of photons at our disposal. Yet delivering photons beyond the surface …

Abstract Ultraviolet (UV, λ< 400 nm) light is essential for various photochemical reactions,
but its intensity in the solar spectrum is very low, and light sources that artificially generate …

Triplet‐triplet annihilation upconversion (TTA‐UC) with near‐infrared (NIR) photosensitizers
is highly desirable for a variety of emerging applications. However, the development of NIR …

Several energy‐demanding photoreactions require harsh UV light from inefficient light
sources. The conversion of low‐energy visible light to high‐energy singlet states via triplet …

Image contrast is often limited by background autofluorescence in steady‐state bioimaging
microscopy. Upconversion bioimaging can overcome this by shifting the emission lifetime …

Achieving room temperature phosphorescence (RTP) of heavy-atom-free organic molecules
with near-infrared (NIR) emission in solutions is fascinating for medical and biological …

The ability to tune excited-state energies is crucial to many areas of molecular design. In
many cases, this is done based on the energies of the highest occupied molecular orbital …

Photoredox catalysis has emerged as an efficient and versatile approach for developing
novel synthetic methodologies. Particularly, red light photocatalysis has attracted more …

Singlet fission and triplet-triplet annihilation upconversion are two multiexciton processes
intimately related to the dynamic interaction between one high-lying energy singlet and two …

The diagnosis of disease biomarkers is crucial for the identification, monitoring, and
prognostic assessment of malignant disease. However, biological samples with …