Periodic Reporting for period 1 - THz Photochemistry (THz Photochemistry: Biased Proton Transfer by Ultrafast Electric Fields)
Periodo di rendicontazione: 2015-04-01 al 2017-03-31
: We were able to obtain the field strength of ~ 120 kV/cm and the sensitivity of ~ 10-4 OD level, Characterization of broad visible pulse temporal dispersion by ZnTe
(2) The validation of the new setup
: We were able to validate the performance of the setup by using various solid state samples: ZnTe, single-layered graphene, and methylammonium lead iodide perovskite
(3) Theoretical description of response of the chemical system (BPB solution) as a function of time, field strength, and initial concentration of BPB
: We estimated the signal level of ~ 10-4 OD with 100 kV/cm of the field strength.
(4) Systematic THz pump – visible probe studies on BPB solutions
: We couldn’t detect the signal from BPB solution yet despite of the well validated performance.
: We developed our strategy to apply external electric voltage by using nm scale spectro-electrochemical cell. Currently we are preparing the cell and holder.
(5) Study on Carrier dynamics
: We were able to obtain the time- and energy- resolved signal from graphene and perovskite samples. Currently we are developing the suitable model to understand carrier dynamics induced by strong electric field.
* List of major deliverables
- The validated fs THz pump – visible probe spectrometer, Technical diagram of the instrument, Data acquisition software
- The time- and frequency- resolved pump probe spectra in controlled environments