Time-Resolved Spectrofluorometer FPC-TDC

First-photon counting: Suitable for samples with low fluorescence quantum yield.

The Time-Resolved Spectrofluorometer FPC-TDC is a time-resolved spectrofluorometer designed for studying fluorescence phenomena 

in materials, making it highly suitable for testing and characterizing electrochemical samples. The sample is excited by a picosecond

 laser pulse, and the system measures the time-of-flight of individual photons from the sample, through the monochromator, to the

 photomultiplier tube (PMT). The statistical distribution of the measured time-of-flight observations reconstructs the shape of the

 fluorescence pulse emitted from the sample. A key requirement of the time-resolved spectrofluorometer is that the probability of a

 photon reaching the PMT is low (<10%). Therefore, this instrument offers a significant advantage in measuring materials with low

 fluorescence quantum yield, making it an essential tool for studying fluorescence phenomena.

"Measurement Functions"

· Fluorescence time decay as a function of light wavelength and polarization potential (in electrochemical samples)

· Emission fluorescence spectrum

· Current-voltage characteristics

· Open circuit potential (OCP)

· Current flow through a sample with a specific polarization potential

"System Configuration"

· Enclosed sample chamber

· Picosecond laser

· UV/Vis/IR monochromator

· Photomultiplier tube (PMT)

· Time-to-digital converter (TDC)

· Potentiostat for providing full characterization of electrochemical samples

· Electrochemical cuvette with platinum electrode and Ag/AgCl reference electrode

· Equipped with dedicated software, FotoGUI

Example result: Fluorescence of a green marker excited with a 405 nm laser

"Technical Specifications"

· Time resolution: 27 ps

· Maximum measurement time: 500 ns

· Photomultiplier tube: R928 Hamamatsu

· Monochromator spectral range: 200 – 1200 nm

· Laser wavelengths: 405 nm, 450 nm, 530 nm, 630 nm

· Potentiostat: Enables a wide range of electrochemical studies