April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

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2024 MRS Spring Meeting
QT03.07.03

Two-Dimensional Lead Organic Chalcogenide Materials with Strong Electron-Phonon Coupling

When and Where

Apr 25, 2024
2:30pm - 2:45pm
Room 444, Level 4, Summit

Presenter(s)

Co-Author(s)

Hanjun Yang1,Sagarmoy Mandal1,Yoonho Lee1,Jee Yung Park1,Libai Huang1,Ming Chen1,Letian Dou1

Purdue University1

Abstract

Hanjun Yang1,Sagarmoy Mandal1,Yoonho Lee1,Jee Yung Park1,Libai Huang1,Ming Chen1,Letian Dou1

Purdue University1
Two-dimensional (2D) metal organic chalcogenides (MOCs) such as silver phenylselenolate (AgSePh) have emerged as a new class of 2D materials due to their unique optical properties. However, these materials typically exhibit large band gaps, and their elemental and structural versatility remains significantly limited. In this work, we synthesize a new family of 2D lead organic chalcogenide (LOC) materials with excellent structural and dimensionality tunability by designing the bonding ability of the organic molecule and the stereochemical activity of the Pb lone pair. The introduction of electron-donating substituents on the benzenethiol ligands results in a series of LOCs that transition from 1D to 2D, featuring reduced band gaps (down to 1.7 eV), and broadband emission. Furthermore, strong electron-phonon coupling is characterized by the presence of coherent optical phonons with long dephasing time, suggesting the low phonon anharmonicity in the LOC materials

Keywords

2D materials | optical properties | spectroscopy

Symposium Organizers

Michal Baranowski, Wroclaw University of Science and Technology
Alexey Chernikov, Technische Universität Dresden
Paulina Plochocka, CNRS
Alexander Urban, LMU Munich

Symposium Support

Bronze
LIGHT CONVERSION
Wroclaw University of Science and Technology

Session Chairs

Alexey Chernikov
Milan Delor

In this Session