Photocatalysis

The weak near-infrared luminescence of singlet oxygen around 1270 nm requires highly efficient excitation schemes. Burst-mode excitation using the 3-Color Stand-Alone Picosecond Laser Prima enhances signal generation, while time-resolved spectroscopy enables reliable detection of emission spectra and decay dynamics despite low detector sensitivity in this spectral range.

Steady-state and time-resolved emission spectra of singlet oxygen produced by H₂TTP were recorded in water and acetone with the High-End Photoluminescence Spectrometer FluoTime 300. Despite spectral overlap and quenching effects in aqueous environments, phosphorescence lifetimes extracted from tail fitting closely matched reported literature

Singlet oxygen emission generated by ZnPc in acetone was detected using the Upright Time-Resolved Photoluminescence Microscope MicroTime 100 combined with the High-End Photoluminescence Spectrometer FluoTime 300. Even from a confined excitation volume, weak phosphorescence signals remained clearly resolvable, demonstrating high sensitivity for spatially restricted measurements.

Time-resolved fluorescence measurements using the modular confocal microscope MicroTime 200 revealed accelerated charge transfer in a hybrid photocatalyst based on ultrathin metal-organic layers and graphene oxide. Shortened RuPS fluorescence lifetimes directly confirmed more efficient electron delivery compared to conventional bulk catalysts.

Time-resolved photoluminescence measurements using the High-End Photoluminescence Spectrometer FluoTime 300 revealed how platinum single atoms and nanoparticles influence recombination pathways in TiO₂ nanosheets. PL quenching at 521 nm and unchanged decay dynamics after Pt removal indicate that only a small number of surface sites dominate photocatalytic hydrogen generation.

TRPL spectroscopy using the High-End Photoluminescence Spectrometer FluoTime 300 revealed reduced charge recombination in CQDs/ZnO composite photocatalysts compared to pure ZnO nanoparticles. Shortened photoluminescence lifetimes indicate more efficient charge separation and electron transport enabled by upconversion-assisted excitation and interfacial charge transfer.

Time-resolved photoluminescence measurements demonstrated accelerated charge transfer in Au–CdS yolk–shell nanocrystals compared to pure CdS. Faster decay dynamics and additional nonradiative pathways confirm efficient interfacial charge separation relevant for photocatalytic pollutant degradation.

Steady-state and time-resolved luminescence measurements using the High-End Photoluminescence Spectrometer FluoTime 300 revealed the emission pathways and excited-state dynamics of NaYF₄:Yb/Er upconversion nanoparticles. Burst-mode excitation enables efficient population of long-lived states, allowing reliable lifetime analysis and identification of the emitting electronic levels relevant for photochemical activation.

Time-resolved fluorescence measurements reveal triplet–triplet annihilation upconversion in a porphyrin–perylene system followed by nonradiative energy transfer to a ruthenium complex. Fluorescence lifetime shortening enables quantitative determination of transfer efficiencies and quenching rates relevant for NIR-triggered photoactivation.

Time-resolved photoluminescence measurements reveal the characteristic ns and µs decay components of TADF sensitizers and quantify triplet involvement through oxygen quenching of the delayed fluorescence. Lifetime analysis enables extraction of intersystem crossing and bimolecular quenching rates, supporting optimization of sensitizer–acceptor energy transfer for green-to-UV upconversion.