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Photo-response in 2D metal chalcogenide-ferroelectric oxide heterostructure controlled by spontaneous polarization

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Abstract

The interplay between free and bound charges in two-dimensional (2D) semiconductor/ferroelectric oxide structures is responsible for the unique opto-electrical properties of these structures. In this study, we vertically combined the 2D layered semiconductors MoS2 (n-type) and WSe2 (p-type) with a ferroelectric oxide (PbTiO3) and found that a ferroelectric polarization induced accumulation or depletion in the layered materials. The heterostructures exhibited polarization-dependent charge distribution and pinched hysteresis. We show that polarization at the interface promoted efficient charge separation of photo-generated carriers in the 2D layers. Optical control of electrical transport was effectively achieved in the MoS2 layers. This study potentially opens up new applications for semiconductor/ferroelectric systems in electronic devices.

Graphical abstract: Photo-response in 2D metal chalcogenide-ferroelectric oxide heterostructure controlled by spontaneous polarization

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Article information


Submitted
14 Oct 2019
Accepted
07 Feb 2020
First published
10 Feb 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Photo-response in 2D metal chalcogenide-ferroelectric oxide heterostructure controlled by spontaneous polarization

H. Jin, J. Kim, Y. Kim, S. Yoon, Y. Lee, K. Kim and W. Jo, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC05621A

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