10. Nanosecond Gated Luminescence Spectrometer

Technique 

The apparatus provides time-resolved emission spectra and luminescence decay traces initiated by a laser pulse as excitation source. The time resolution amounts can be as low as 3 ns and spectra or decay times from ns to seconds can be recorded in a spectral range from 250 to 900 nm depending on the selected detector.

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Units

Q-switched Nd-YAG laser system with optical parametric oscillator, N2 laser, computer control cryostat, The detection consists of 2 independent spectrographs (Acton Research 300), intensified CCD Camera (Princeton Instruments PI-MAX4), CCD Camera (Princeton Instruments Pixis), PMTs (Hamamatsu), oscilloscope (Tektronix DPO3054). 

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Instrument type

Homemade

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Complexity level

High

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Applications

The setup is capable of monitoring luminescence spectra and decay traces at temperatures (77-500 K) and, by analysis of such data, can provide fundamental information of the slow excited state dynamics (ns-ms). For instance, it allows disentangling of energetically close-laying excited states e.g. triplet states from singlet states.