Photoluminescence spectrometer with optical cryostat and integrating sphere

The client specified a photoluminescence spectrometer for low temperature measurements. The instrument had to be able to (1) measure steady-state luminescence spectra; (2) measure fluorescence lifetimes on a time scale of at least 200 ps to 10 µs using the TCSPC method; (3) measure phosphorescence lifetimes on a time scale of at least 1 µs to 1 s. The spectrometer had to have a guaranteed sensitivity greater than 30000:1, powerful Czerny-Turner monochromators and a spacious sample chamber with access from the front, side, top and bottom. The fluorimeter must also contain a nitrogen cryostat with at least 3 input windows and a temperature range of at least 77-300 K and an integrating sphere for absolute quantum yield measurements.

For this task, we chose the FLS1000 modular photoluminescence spectrometer with dual monochromators, total sensitivity >35000:1, a set of excitation sources, a TE-cooled photomultiplier tube and a spacious sample chamber. The system includes a nitrogen cryostat with 4 input windows ("X" geometry) and a temperature range of 77-300 K and an integrating sphere for quantum yield measurements. The spectrometer allows measurement of luminescence lifetimes in the range of 100 ps - 10 s.