Posted on 6/5/2020
Transient absorption (TA) spectroscopy, also known as flash photolysis, is a pump-probe spectroscopic technique utilised to measure the photogenerated excited state absorption energies and associated lifetimes of molecules, materials, and devices.
The pump-probe technique can be described by a sample being photo-excited by a light source (pump pulse), whereby a second light source (probe pulse) is measured for changes in absorption as a function of wavelength and time. The technique focuses on measuring excited singlet and triplet states, electron and energy transfer mechanisms, and photo-product reactions, to nam...