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Equipment

    10. Nanosecond Gated Luminescence Spectrometer

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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.

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). 

Instrument type

Homemade

Complexity level

High

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.