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 …

Organic semiconductor materials have been widely used in various optoelectronic devices
due to their rich optical and/or electrical properties, which are highly related to their excited …

Many applications, including solar energy conversion, can be enhanced by the
upconversion of low energy photons. A flexible approach towards achieving this is by …

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

For semiconductors, doping is an efficient approach to tune their energy bandgaps, charge
transport, and optical properties which could enable the improvement of the corresponding …

The development of efficient solid-state photon upconversion (UC) devices remains
paramount for practical applications of the technology. In recent years, the incorporation of …

Triplet–triplet annihilation upconversion (TTA-UC) is a process by which a lower energy
photon can be upconverted to a higher energy state. The incorporation of TTA-UC materials …

For an efficient triplet–triplet annihilation photon upconversion (TTA-UC) process, matrices
in which sensitizers and emitters are dispersed should not only allow molecular diffusions …

There is an urgent demand for substituting synthetic plastics to bioplastics for sustainable
renewable energy production. Here, we report a simple one-step approach to create …

Realization of efficient photon upconversion (UC) mediated by triplet–triplet annihilation
(TTA) in a solid state is a great challenge, even though order of magnitude higher …