Transition Dipole Moments of n = 1, 2, and 3 Perovskite Quantum Wells from the Optical Stark Effect and Many-Body Perturbation Theory

Andrew H. Proppe, Grant W. Walters, Abdullah Yousef Alsalloum, Ayan A. Zhumekenov, Edoardo Mosconi, Shana O. Kelley, Filippo De Angelis, Lyudmyla Adamska, Paolo Umari, Osman Bakr, E. Sargent

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Metal halide perovskite quantum wells (PQWs) are quantum and dielectrically confined materials exhibiting strongly bound excitons. The exciton transition dipole moment dictates absorption strength and influences interwell coupling in dipole-mediated energy transfer, a process that influences the performance of PQW optoelectronic devices. Here we use transient reflectance spectroscopy with circularly polarized laser pulses to investigate the optical Stark effect in dimensionally pure single crystals of n = 1, 2, and 3 Ruddlesden-Popper PQWs. From these measurements, we extract in-plane transition dipole moments of 11.1 (±0.4), 9.6 (±0.6) and 13.0 (±0.8) D for n = 1, 2 and 3, respectively. We corroborate our experimental results with density functional and many-body perturbation theory calculations, finding that the nature of band edge orbitals and exciton wave function delocalization depends on the PQW
Original languageEnglish (US)
Pages (from-to)716-723
Number of pages8
JournalThe Journal of Physical Chemistry Letters
Volume11
Issue number3
DOIs
StatePublished - Jan 15 2020

Fingerprint Dive into the research topics of 'Transition Dipole Moments of n = 1, 2, and 3 Perovskite Quantum Wells from the Optical Stark Effect and Many-Body Perturbation Theory'. Together they form a unique fingerprint.

Cite this