In cooperation with Edinburgh Instruments, Ltd., we modernized the more than ten years old photoluminescence spectrometer FLS920 at Tomas Bata University in Zlín.
The original excitation monochromator has been replaced by a new dual excitation monochromator, which increases the accuracy of wavelength selection, but more importantly is more efficient in suppressing unwanted stray light. The suppression has increased from 10^(-5) to 10^(-10).
The range and speed of temperature measurements have been greatly extended by the new nitrogen cryostat.
An integrating sphere was also added to the system to measure the quantum yield of solutions and powder samples.
In the sample chamber itself, a transmission detector was added to measure the transmittance and absorbance of the samples under investigation.
The spectrometer has also been supplemented with picosecond LED light sources to serve as excitation sources for luminescence (fluorescence) lifetime measurements using the Time Correlated Single Photon Counting method.
Finally, the core of the system, i.e. the complex data acquisition electronics, has been replaced to allow steady state and time resolved measurements in TCSPC and MCS mode.
Thanks to the new electronics, the system has become independent of the PC used, which can now be upgraded or changed without restriction. The new electronics communicate with the PC via a USB interface.
This brings the old system up to the level of the new FLS980 spectrometers.
