December 1 - 6, 2024
Boston, Massachusetts
Symposium Supporters
2024 MRS Fall Meeting & Exhibit
NM05.11.03

High-Throughput Computational Design of High-Performance High-K Dielectrics for 2D Electronics

When and Where

Dec 4, 2024
4:15pm - 4:30pm
Hynes, Level 2, Room 207

Presenter(s)

Co-Author(s)

Ming Yang1

The Hong Kong Polytechnic University1

Abstract

Ming Yang1

The Hong Kong Polytechnic University1
Two-dimensional (2D) semiconductors such as molybdenum disulfide (MoS2) could potentially replace silicon in future electronic devices. However, the high-performance integration of high-k dielectrics on 2D semiconductors remains a grand challenge. In this talk, we show that for the interface between conventional high-k dielectrics and 2D MoS2, hydrogenation is a desired approach to passivate the dangling bonds and improve the interface properties, in which the hydrogenation can selectively occur at high-k dielectrics such as Si3N4 and HfO2, and do not affect the 2D semiconductor MoS2. We further demonstrate the improved performance for hydrogenated interface of HfO2/MoS2, as evidenced by the increased carrier mobility, narrow hysteresis window, and much reduced interfere state density. We find that this selective hydrogenation strategy can be generalized to any interface of high-k dielectrics and 2D semiconductors, where there exists free energy difference for hydrogen adsorption between them. Finally, we report a data-driven approach to accelerate the development of various promising inorganic molecular crystals as the high-performance high-k dielectrics for 2D MoS2 based electronic devices. These results deepen the understanding the interface of 2D semiconductors and high-k dielectrics, and could be useful for developing a broad range of high-performance 2D electronic and optoelectronic devices.

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

HaeYeon Lee
Ying Wang

In this Session