The efficient utilization of the photosensitive rare-earth (RE 3+/Ln 3+) NPs in several fields,
such as biosensing, biomarkers, bioimaging, theragnostic, thermometry, anticounterfeiting …

All photovoltaic solar cells transmit photons with energies below the absorption threshold
(bandgap) of the absorber material, which are therefore usually lost for the purpose of solar …

Upconversion nanoparticles (UCNPs) are one kind of luminescence nanomaterials that
convert low energy photons to high energy emissions. These nanomaterials have recently …

Nanochemistry and nanomaterials provide numerous opportunities for a new generation of
photovoltaics with high solar energy conversion efficiencies at low fabrication cost. Quantum …

Low-power upconversion via sensitized triplet–triplet annihilation (TTA-UC) is a useful and
versatile process that allows for the conversion of optical radiation into photons of higher …

In the last decade, upconversion and downconversion nanoparticles (UCNPs and DCNPs)
have exhibited attractive unique optical properties and are used in various fields, including …

Liposomes capable of generating photons of blue light in situ by triplet–triplet annihilation
upconversion of either green or red light, were prepared. The red‐to‐blue upconverting …

The conversion of low-energy light into high-energy light, also known as upconversion, can
be exploited in life science applications such as bioimaging and phototherapy. Sensitized …

The efficiency of thin-film solar cells with large optical band gaps, such as organic bulk
heterojunction or amorphous silicon solar cells, is limited by their inability to harvest the …

This critical review discusses different approaches towards protection of photoactive
materials based on triplet excited state ensembles against deactivation by molecular oxygen …