December 1 - 6, 2024
Boston, Massachusetts
Symposium Supporters
2024 MRS Fall Meeting & Exhibit
NM05.08.10

Layer Dependence of Excitonic Properties in 2D Hybrid Metal Organic Chalcogenolates

When and Where

Dec 3, 2024
8:00pm - 10:00pm
Hynes, Level 1, Hall A

Presenter(s)

Co-Author(s)

Nicholas Samulewicz1,Woo Seok Lee1,Yeongsu Cho1,William Tisdale1

Massachusetts Institute of Technology1

Abstract

Nicholas Samulewicz1,Woo Seok Lee1,Yeongsu Cho1,William Tisdale1

Massachusetts Institute of Technology1
Rapidly expanding integration of semiconductors in consumer electronics up through large-scale supercomputers necessitates substantial quantum and production efficiency improvements to reduce global electricity consumption. 2D semiconductors, like transition metal dichalcogenides (TMDs) and 2D lead halide perovskites (LHPs), have emerged in recent years as strong contenders over silicon and other bulk semiconductors due to their strong exciton binding energies and highly tunable properties.<br/>We investigate metal organic chalcogenolates (MOCs) as 2D semiconductors that can improve upon these existing structures—for example, the layer dependence of TMDs and instability of metal halide perovskites. MOCs are a novel class of van der Waals stacked hybrid organic-inorganic semiconductors with extreme 1D quantum confinement, in-plane anisotropy, and strong exciton-lattice interaction. Moreover, unlike TMDs and 2D LHPs, MOCs feature covalent bonding between organic and inorganic components, providing strong environmental stability while also allowing for bandgap tunability through organic functionalization. These properties are promising for applications as light emitting diodes (LEDs), excitonic switches, and a variety of other optoelectronic devices. Silver phenylselenolate, AgSePh, is a MOC of particular interest due to its narrow, natively blue emission (~467 nm). However, its excited state dynamics are still dominated by unknown nonradiative recombination mechanisms, limiting its potential to revolutionize future semiconductor frameworks. This work details layer dependence studies that determine the susceptibility of individual MOC layers to one another and their environment to elucidate the intrinsic light-matter interaction of this hybrid material class.

Keywords

2D materials

Symposium Organizers

Andras Kis, Ecole Polytechnique Federale de Lausanne
Li Lain-Jong, University of Hong Kong
Ying Wang, University of Wisconsin, Madison
Hanyu Zhu, Rice University

Session Chairs

Ying Wang
Hanyu Zhu

In this Session