Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites (doi:10.21979/N9/OIYOW1)

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Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites

doi:10.21979/N9/OIYOW1

DR-NTU (Data)

2020-12-03

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Ramesh, Sankaran, 2020, "Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites", https://doi.org/10.21979/N9/OIYOW1, DR-NTU (Data), V2

Replication Data for: The Physics of Interlayer Exciton Delocalization in Ruddlesden Popper Lead Halide Perovskites

doi:10.21979/N9/OIYOW1

Ramesh, Sankaran (Nanyang Technological University)

Origin

Microsoft Excel

Python

Matlab

Start-up grant M4080514

AcRF Tier 1 grant RG91/19

Tier 2 grants MOE2016-T2-1-034

Tier 2 grants MOE2017-T2-1-001

Tier 2 grants MOE2017-T2-2-002

Competitive Research Program NRF-CRP14-2014-03

NRF Investigatorship NRF-NRFI-2018-04

DR-NTU (Data)

Ramesh, Sankaran

Ramesh, Sankaran

2020-12-03

https://doi.org/10.21979/N9/OIYOW1

Physics, Physics, Perovskites, Modelling, transient absorption spectroscopy

Abstract: Two-dimensional (2D) lead halide Ruddlesden-Popper perovskites (RPP) recently emerged as a prospective material system for optoelectronic applications. Their self-assembled multi quantum-well structure gives rise to the novel inter-well energy funnelling phenomenon, which is of broad interests for photovoltaics, light-emission applications and in emerging technologies (e.g., spintronics). Herein, we developed a realistic finite quantum-well superlattice model that corroborates the hypothesis of exciton delocalization across different quantum-wells in RPP. Such delocalization leads to a sub-50 fs coherent energy transfer between adjacent wells, with the efficiency depending on the RPP phase matching and the organic large cation barrier lengths. Our approach provides a coherent and comprehensive account for both steady-state and transient dynamical experimental results in RPPs. Importantly, these findings pave the way for a deeper understanding of the physics underpinning these systems crucial for establishing materials design-rules to realize efficient RPP-based devices.

Experimental Data

Simulation codes

Codes for simulation of Exciton delocalization in confined quantum wells can be found in the github repository https://github.com/Sankaranr1/Exciton_Delocalization_Funnelling.git The python code GUI_2.0.py runs a GUI application on screen to visualize delocalization of exciton wavefunction in adjacent quantum wells. The parameters that the user can tune are the number of wells (2,3 or 4), width of each well, barrier height and oscillation dephasing time. The simulation shows the evolution of wavefunction in time, and the plot of population in each well as a function of time.

10.1021/acs.nanolett.0c03800

Giovanni, D., Ramesh, S., Righetto, M., Lim, M. J. W., Zhang, Q., Wang, Y., Ye, S., Xu, Q., Mathews, N. & Sum, T. C. (2021). The physics of interlayer exciton delocalization in Ruddlesden–Popper lead halide perovskites. Nano Letters, 21(1), 405-413.

10356/147025

Giovanni, D., Ramesh, S., Righetto, M., Lim, M. J. W., Zhang, Q., Wang, Y., Ye, S., Xu, Q., Mathews, N. & Sum, T. C. (2021). The physics of interlayer exciton delocalization in Ruddlesden–Popper lead halide perovskites. Nano Letters, 21(1), 405-413.

Ramesh, S. (2023). Exciton Delocalization GUI 1.0 (Version v1.0) [Computer software].

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