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 …

Conspectus Photon upconversion, the process of converting low-energy photons into high-
energy ones, has been widely applied for solar energy conversion, photoredox catalysis …

Multiresonance thermal activated delayed fluorescence (MR-TADF) materials with an
efficient spin–flip transition between singlet and triplet excited states remain demanding …

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 …

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 …

Many CuI complexes have luminescent triplet charge-transfer excited states with diverse
applications in photophysics and photochemistry, but for isoelectronic ZnII compounds, this …

Photochemical upconversion is a process whereby two lower-energy photons are converted
into a higher-energy photon by sensitized triplet–triplet annihilation. While recent interest in …

By combining the energy input from two red photons, chemical reactions that would normally
require blue or ultraviolet irradiation become accessible. Key advantages of this biphotonic …

Solar energy harvesting is among the best solutions for a global transition toward carbon-
neutral energy technologies. The existing solar energy harvesting technologies like …

Electroluminescence (EL) from the singlet-excited (S1) state is the ideal choice for stable,
high-performing deep-blue organic light-emitting diodes (OLEDs) owing to the advantages …