Triplet–triplet annihilation based molecular photon upconversion (TTA-UC) is an exciting
research area for a broad range of photonic applications due to its tunable spectral range …

Upconversion of low‐energy photons into high‐energy photons increases the efficiency of
photovoltaic devices by converting photons with energies below the absorption threshold of …

In the last 15 years, the attention dedicated to organic conjugated systems experienced
outstanding growth because of the renewed interest in mechanisms involving triplet states …

Hyperfluorescence has received significant attention as a promising strategy to design
organic light-emitting diodes (OLEDs) with high color purity and enhanced stability. In this …

Upconversion (UC) of low-energy photons into high-energy light can in principle increase
the efficiency of solar devices by converting photons with energies below the energy …

The ability to upconvert light is useful for a range of applications, from biological imaging to
solar cells. But modern technologies have struggled to upconvert incoherent incident light at …

Herein, triplet–triplet annihilation upconversion (TTA-UC) from near-infrared (NIR, 785 nm)
to visible (yellow, centered at 570 nm) regions has been demonstrated in the binary solid of …

Photon upconversion has attracted enormous attention due to its wide range of applications
in biological imaging, photocatalysis, and especially photovoltaics. Here, the effect of …

Upconversion is a photon-management process especially suited to water-splitting cells that
exploit wide-bandgap photocatalysts. Currently, such catalysts cannot utilize 95% of the …

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 …