12. Time of Flight Setup (TOF)

Technique 

A laser excitation pulse produces charge carriers in a thin film which are driven to electrodes by a constant electric field applied on the film. The resulting current transient is recorded by a digital osilloscope. The time domain extends from ns to µs.

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Units

Q-switched Nd-YAG laser system with optical parametric oscillator, detection.

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Instrument type

Homemade

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Complexity level

Medium

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Applications

Analysis of the transient current allows to determine on carrier mobility and recombination rate.