136
S. Banerjee et al.
been evaluated using TRTS in several LHPs in the polycrystalline thin film and
nanocrystalline states [58, 97–99]. A recent TRTS result on a mixed cation and
mixed halide perovskite FA 0.85 Cs 0.15 Pb(I 0.97 Br 0.03 ) at low temperature is shown in
Fig. 12 [100]. Here TRTS could resolve the interaction between charge carriers and
the low energy phonons in real-time and their contribution in modulating carrier
Fig. 12 a THz-TDS data of the photo-excited perovskite thin-film. b Real photoconductivity as
obtained from the difference between the excited and the equilibrium THz conductivity. The c
real and d imaginary part of THz photoconductivity at different pump-probe delays, showing the
contributions from photogenerated charge carriers and phonons. Adapted with permission from
Ref. [101]. Copyright 2018 American Chemical Society
S. Banerjee et al.
been evaluated using TRTS in several LHPs in the polycrystalline thin film and
nanocrystalline states [58, 97–99]. A recent TRTS result on a mixed cation and
mixed halide perovskite FA 0.85 Cs 0.15 Pb(I 0.97 Br 0.03 ) at low temperature is shown in
Fig. 12 [100]. Here TRTS could resolve the interaction between charge carriers and
the low energy phonons in real-time and their contribution in modulating carrier
Fig. 12 a THz-TDS data of the photo-excited perovskite thin-film. b Real photoconductivity as
obtained from the difference between the excited and the equilibrium THz conductivity. The c
real and d imaginary part of THz photoconductivity at different pump-probe delays, showing the
contributions from photogenerated charge carriers and phonons. Adapted with permission from
Ref. [101]. Copyright 2018 American Chemical Society