TRANSIENT ABSORPTION SPECTROMETER with pico second resolution
Observation of Transient Absorption Spectra of Excited Singlet/Triplet State
Measurement of Intersystem Crossing (ISC) Rate
Research of Electron Transfer, Charge Separation/Recombination Dynamics
Observation of Intermolecular Reaction, Excimer Generation etc.
Dynamics of Artificial Photosynthesis, Solar Energy Cell, Organic EL
Photon stimulated reactions
Organic Solar Cell,
Organic and molecular electronics
Transient Absorption Spectroscopy (TAS) is a high-speed time resolved absorption measurement. A pulsed light (pump light) excites the target material. The subsequent processes are observed by time resolved spectroscopic analysis. In contrast to fluorescence spectroscopy, TAS can explore non-fluorescent reactions over a wide time regime such as short-lived radical species, intermediate and charge transfer states.
picoTAS has some distinct advantages over conventional transient absorption techniques. Other than the “Pump & Probe” method or the “Nanosecond Flash Photolysis” method, picoTAS can measure from the pico second regime to milli seconds. And it can detect fluorescent and non-fluorescent intermediates.
picoTAS has an ingenious way to remove overlaying luminescence signal and can obtain an accurate transient absorption (TA) signal of i.e. excited singlet and triplet states.
|Method||RIPT method (Randomly Interleaved Pulse Train method)|
|Time Resolution (10%–90% rise time)||<400 ps||<100 ps|
|Delay Time resolution||10 ps, 20 ps, 50 ps, 100 ps, 200 ps, 500 ps, 1 ns, 2 ns, 5 ns, 10 ns, 20 ns|
|Full scale||100 ns–2 ms|
|Wavelength Range||410–1600 nm|
|Automatic Control||wavelength scan, light intensity adjustment, shutter control|
|Sample Holder||solution (optical path length is 2 mm), thin film|
|Pump Light Source||
|Probe Light Source||
|PC & Software||
|Installation Requirement||optical bench not required||optical bench required|