Measuring the Exciton Binding Energy: Learning from a Decade of Measurements on Halide Perovskites and Transition Metal Dichalcogenides

KR Hansen, JS Colton… - Advanced Optical …, 2024 - Wiley Online Library
The exciton binding energy (Eb) is a key parameter that governs the physics of many
optoelectronic devices. At their best, trustworthy and precise measurements of Eb challenge …

Mechanistic origins of excitonic properties in 2D perovskites: Implications for exciton engineering

KR Hansen, CY Wong, CE McClure, B Romrell… - Matter, 2023 - cell.com
As the field of 2D halide perovskites (HPs) matures, state-of-the-art techniques to measure
important properties, such as the band gap (E g) and exciton binding energy (E b), continue …

Traversing excitonic and ionic landscapes: reduced-dimensionality-inspired design of organometal halide semiconductors for energy applications

D Powell, KR Hansen, L Flannery… - Accounts of Chemical …, 2021 - ACS Publications
Conspectus At the very heart of the global semiconductor industry lies the omnipresent push
for new materials discovery. New materials constantly rise and fall out of fashion in the …

Stochastic Charge-Transfer Excitons in 2D Metal-Halide Perovskites

KR Hansen, CE McClure, MA Parker, Z Xie… - ACS Energy …, 2024 - ACS Publications
The coupling between the polar lattice and the electronic system is a key ingredient
enabling the impressive properties of 2D and 3D metal-halide perovskites (MHPs). For …

Dynamics of internal electric field screening in hybrid perovskite solar cells probed using electroabsorption

D Moia, I Gelmetti, P Calado, Y Hu, X Li, P Docampo… - Physical Review …, 2022 - APS
Electric fields arising from the distribution of charge in metal-halide perovskite solar cells are
critical for understanding the many weird and wonderful optoelectronic properties displayed …

Ruddlesden–Popper Perovskite Alloys: Continuous and Discontinuous Tuning of the Electronic Structure

KR Hansen, B Romrell, CE McClure… - The Journal of …, 2023 - ACS Publications
Alloying mixed ratios of elements into the halide perovskite (HP) structure has proven to be
an effective method of tuning these materials' structural and electronic properties for …

Improved structural order and exciton delocalization in high-member quasi-two-dimensional tin halide perovskite revealed by electroabsorption spectroscopy

Z Xing, Z Zang, H Li, Z Ning, KS Wong… - The Journal of …, 2023 - ACS Publications
Engineering of quasi-two-dimensional (quasi-2D) tin halide perovskite structures is a
promising pathway to achieve high-performance lead-free perovskite solar cells, with …

Floquet Engineering of Excitons in Two-Dimensional Halide Perovskites via Biexciton States

R Cai, M Feng, A Kanwat, T Furuhashi, B Wang… - Nano Letters, 2024 - ACS Publications
Layered two-dimensional halide perovskites (2DHPs) exhibit exciting non-equilibrium
properties that allow the manipulation of energy levels through coherent light–matter …

Is Dielectric Mismatch Actually Important in 2D Perovskites?

KR Hansen - Nano Letters, 2024 - ACS Publications
Understanding and controlling exciton properties are important for the design of 2D
semiconductors, such as monolayer transition metal dichalcogenides (TMDCs) and 2D …

Resolving buried optoelectronic features in metal halide perovskites via modulation spectroscopy studies

E Amerling, KR Hansen… - Journal of Materials …, 2021 - pubs.rsc.org
As research on both bulk and low dimensional metal halide perovskites (MHPs) continues to
grow, the tools necessary to gain insights into their exotic and highly convoluted …