Time-Resolved Emission Spectroscopy (TRES)

Time-resolved emission spectra (TRES) were recorder using PicoQuant’s FluoTime 300 Photoluminescence Spectrometer to separate charge carrier dynamics in a GaAsP quantum well heterostructure. Emission peaks at 650 nm, 735 nm, and 860 nm are assigned to the Al₀.₄Ga₀.₆As barrier, the GaAsP quantum well, and the n-GaAs layer and the GaAs substrate. Layer-specific lifetimes reveal distinct recombination dynamics within the multilayer system.

Time-resolved emission spectra (TRES) of tryptophan in saline buffer were recorded using PicoQuant’s FluoTime 300 Photoluminescence Spectrometer. Thirty-one wavelength-resolved decay curves were globally analyzed, revealing three characteristic lifetimes of 360 ps, 2.5 ns, and 7.4 ns, reflecting heterogeneous excited-state dynamics.

A steady-state spectroscopy method that measures the intensity of light emitted from a material under continuous excitation. It provides insights into electronic band structure, defect states, and optical quality but does not capture temporal emission dynamics.

A time-resolved spectroscopy method that measures the temporal decay of photoluminescence after pulsed excitation. It provides insights into charge carrier lifetimes, recombination pathways, and defect-related dynamics in materials but does not resolve spatial variations across a sample.

A spatially resolved extension of time-resolved photoluminescence that maps carrier lifetimes across a sample surface. It enables visualization of local recombination dynamics, diffusion effects, and material inhomogeneities but typically does not capture full spectral evolution over time.