The exciton, an excited electron–hole pair bound by Coulomb attraction, plays a key role in
photophysics of organic molecules and drives practically important phenomena such as …

Copper indium sulfide (CuInS2) is a ternary A (I) B (III) X (VI) 2-type semiconductor featuring
a direct bandgap with a high absorption coefficient. In attempts to explore their practical …

The ability to upconvert two low energy photons into one high energy photon has potential
applications in solar energy, biological imaging, and data storage. In this Letter, CdSe and …

The spectral properties of lead halide perovskite nanocrystals (NCs) can be engineered by
tuning either their sizes via the quantum confinement effect or their compositions using …

To improve the efficiency of photon upconversion, a hybrid approach of combining organic
dyes and inorganic nanoparticles is proving successful, especially in the form of dye …

Inorganic semiconductor nanocrystals interfaced with spin-triplet exciton-accepting organic
molecules have emerged as promising materials for converting incoherent long-wavelength …

Photon upconversion (UC) based on sensitized triplet–triplet annihilation (TTA), TTA-UC,
can potentially alleviate the transmission loss of below-band-gap photons in solar energy …

Molecular control of energy transfer is an attractive proposition because it allows chemists to
synthetically tweak various kinetic and thermodynamic factors. In this Perspective, we …

Triplet energy transfer (TET) from semiconductor nanocrystals (NCs) has recently emerged
as a new triplet sensitization paradigm. It remains unclear how trap states pervasive in NCs …

This perspective article provides a comprehensive but organized tutorial introduction of the
kinetics related to photon upconversion (UC) by triplet–triplet annihilation (TTA)(TTA-UC) …