Highlights•Mechanism of TTA-UC.•Development of sensitizer and activator.•Host material
development.•Bioimaging and biodetection with TTA-UC.Upconversion of light has attracted …

An important challenge when developing materials for triplet–triplet annihilation
upconversion (TTA-UC) is achieving efficient and well-functioning solid-state systems. We …

We present a red-to-blue upconversion system based on triplet–triplet annihilation in a solid-
state film configuration that significantly enhances the photocurrent of a model solar cell …

Six new four-coordinate tetrahedral boron complexes, containing 9-borafluoren-9-yl and
diphenylboron cores attached to orthogonal fluorine-and chlorine-substituted 8 …

This article proposes the exploitation of widely available, inexpensive, innocuous “green”
liquid polyethylene glycol (PEG) polymers containing the oxygen scavenger oleic acid (OA) …

Photochemical upconversion uses sensitized triplet–triplet annihilation in bimolecular
compositions to convert lower energy photons to higher energy photons. For high efficiency …

This paper studies photochemical upconversion in solutions of octaethyl porphyrin (OEP)
and diphenyl anthracene (DPA). The system has been widely used as a standard model …

Triplet–triplet annihilation upconversion (TTA-UC) is a process that shows promise for
applications such as energy-harvesting and light-generation technologies. The irradiance …

This work describes the synthesis and characterisation of new tetrahedral boron complexes,
incorporating bromine-or iodine-substituted 8-quinolinolato chelate chromophores …

Radiation upconversion can be an elegant and efficient strategy to minimize waste in energy
harvesting and storage processes. The upconversion based on triplet–triplet annihilation …