Time-Resolved Photoluminescence (TRPL)

Time-resolved photoluminescence was applied to gummy bears, CIGS solar cells, and LED display pixels to compare lifetime behavior across diverse materials. While confectionery samples illustrate spectral and lifetime differences, solar cells and LEDs reveal spatial variations in emission dynamics and material quality. Measurements were performed using the FluoTime 300 spectrometer combined with the upright widefield microscope FluoMic.

Steady-state spectra, time-resolved photoluminescence, and time-resolved electroluminescence were combined to analyze a hybrid quantum dot LED. While spectral data show overlapping emission from QDs and LED die, TRPL and TREL resolve carrier lifetimes and recombination pathways. All measurements were conducted using the FluoTime 300 spectrometer.

Selective electron and hole transport layers were used in TRPL quenching experiments to determine diffusion lengths in mixed-halide and triiodide perovskite films. Distinct decay dynamics correlate with charge-carrier transport and device efficiency. Measurements were performed using the FluoTime 300 photoluminescence spectrometer.

Spectrally and spatially resolved TRPL was used to investigate GaAsP quantum well structures, revealing layer-specific carrier lifetimes and recombination pathways. Intensity-dependent decay analysis enabled mapping of diffusion processes and interface quality at sub-nanosecond resolution. Experiments utilized the MicroTime 100 microscope and the FluoTime 300 spectrometer.

TRPL measurements of blade-coated perovskite films treated with Zn(OOSCF₃)₂ demonstrate a threefold increase in carrier lifetime and improved photoluminescence quantum yield, indicating effective defect passivation. These insights supported fabrication of minimodules achieving 19.6% certified efficiency. Measurements were performed using the FluoTime 300 and MicroTime 100 systems.

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 spatially resolved spectroscopy method that maps photoluminescence decay dynamics across a sample following pulsed excitation. It reveals variations in carrier lifetimes, recombination pathways, and defect distributions with micrometer-scale resolution, enabling correlation of temporal emission properties with material morphology.