To fulfill the promise of two-dimensional perovskites (2DPs) for high-performance optoelectronics, we used mechanical exfoliation to obtain n = 1 / n = 3 2DP-heterostructures and ultrafast techniques to characterize charge carriers’ dynamics at interface.
In the presence of the heterostructure, we observe the suppression of excitonic-radiative recombination and the introduction of a fast decay channel for excitons (t < 2 ns) which explains more than 80% of the total photoluminescence decay. Such evidence can be explained through ultrafast electron and hole transfer at the heterostructure interface.
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