Efficient interlayer exciton transport in two-dimensional metal-halide perovskites

Abstract

Two-dimensional (2D) metal-halide perovskites are attractive for use in light harvesting and light emitting devices, presenting improved stability as compared to the more conventional three-dimensional perovskite phases. Significant attention has...

Non-Markovian diffusion of excitons in layered perovskites and transition metal dichalcogenides

“…28,29 For two-dimensional metal-halide perovskites it was experimentally proven that interlayer exciton transport is much slower and less effective than in-plane exciton transport. 36 Among the reasons for that is the necessity of tunnelling between the layers through the barrier imposed by the insulating long organic cations. 71 Hence, for both systems, it is justified to use a 2D diffusion model in simulations.…”

“…This includes inorganic and organic molecular semiconductors, [1][2][3] photosynthetic complexes, 4,5 polymers, [6][7][8] molecular aggregates, [9][10][11] semiconductor quantum wells and quantum wires, [12][13][14][15] colloidal quantum dots and nanoplatelets, [16][17][18][19][20][21][22][23][24][25] transition metal dichalcogenides, [26][27][28][29][30] and perovskites. [31][32][33][34][35][36][37] The dynamical properties of these systems are crucial for the advancement of optoelectronic applications including novel lasers, 16 photodetectors, 38 light-emitting diodes [39][40][41] and solar cells. [42][43][44] The effective operation of optoelectronic devices depends on the fundamental parameters of the exciton dynamics.…”

Origin and physical effects of edge states in two-dimensional Ruddlesden-Popper perovskites

“…But for LED, excitons are desirable than free carriers because LED requires efficient radiative electron-hole recombination and the free carriers will reduce the quantum efficiency of LED. Thus, it is essential to consider exciton dissociation and free carrier property of 2D RP perovskites when designing optoelectronic devices ( Baranowski and Plochocka, 2020 ; Baranowski et al., 2019 ; Blancon et al., 2017 ; Buizza et al., 2019 ; Cho et al., 2020 ; Fujiwara et al., 2020 ; Gan et al., 2021 ; He et al., 2020 ; Kinigstein et al., 2020 ; Li et al., 2020a , 2020b ; Lin et al., 2020 ; Magdaleno et al., 2021 ; Milot et al., 2016 ; Motti et al., 2019 ; Proppe et al., 2018 ; Zhang et al., 2019b , 2020 ; Zhou et al., 2019 , 2020 ).…”

Femtosecond Exciton and Carrier Relaxation Dynamics of Two-Dimensional (2D) and Quasi-2D Tin Perovskites

“…We cannot, however, exclude the existence of phase impurity in sample N2 that accelerated the biexcitonic relaxation. The time scale of energy transfer in mixed-phase LD Pb perovskites was determined to be <0.2 ps. ,− Beyond the rapid spin-split biexciton relaxation, accelerated relaxation of biexciton in the case of N2 involving a high-order phase transformation hence seems to be possible.…”