Abstract
Transient absorption in the Visible and in the deep-UV is performed on MAPbBr3 thin films with 3.1 eV pump excitation. The UV probe can access higher order transitions in the material exploring different high-symmetry points of the Brillouin zone. Uncorrelated electron-hole pairs are generated within the instrument response function of 150 fs. The photobleaching at 3.3 eV shows that electron cooling happens in ~ 1 ps.
Highlights
Transient absorption in the Visible and in the deep-UV is performed on MAPbBr3 thin films with 3.1 eV pump excitation
Charge-carrier dynamics in MAPbBr3 with above band gap excitation has been intensively investigated by femtosecond transient absorption spectroscopy (TAS) in the Visible [4], [5]-[7]
Using deep-UV TAS with 150 fs time resolution from 270 to 370 nm [8], higher order interband transitions can be reached in MAPbBr3, from which we observe the electron dynamics
Summary
Transient absorption in the Visible and in the deep-UV is performed on MAPbBr3 thin films with 3.1 eV pump excitation. Charge-carrier dynamics in MAPbBr3 with above band gap excitation has been intensively investigated by femtosecond transient absorption spectroscopy (TAS) in the Visible [4], [5]-[7].
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