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Published on: February 27, 2017
Spatial and temporal shaping for the two-photon excitation in bromine perovskites for solar cells
Abstract:
We utilize temporally and spatially shaped laser pulses for two-photon-excited luminescence of bromine perovskites for solar cells. The tailored laser pulses are generated by guiding a laser beam through a temporal shaper and a subsequent two-dimensional spatial shaper. Signatures of two-photon absorption and spectrally selective excitation are obtained by spectral phase shaping, and different photoluminescence patterns are generated by spatial beam modulation. Moreover, the interference between two light components can be controlled by tuning its phase difference which is utilized to modify the luminescence intensities. The described shaping method will be of interest for further investigations on perovskites for solar cells.
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