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

Title
Photo-response in 2D metal chalcogenide-ferroelectric oxide heterostructure controlled by spontaneous polarization
Authors
Jin, Hye-JinKim, JayeongKim, YejinYoon, SeokhyunLee, YangjinKim, KwanpyoJo, William
Ewha Authors
조윌렴윤석현
SCOPUS Author ID
조윌렴scopus; 윤석현scopus
Issue Date
2020
Journal Title
JOURNAL OF MATERIALS CHEMISTRY C
ISSN
2050-7526JCR Link

2050-7534JCR Link
Citation
JOURNAL OF MATERIALS CHEMISTRY C vol. 8, no. 11, pp. 3724 - 3729
Publisher
ROYAL SOC CHEMISTRY
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
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.
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DOI
10.1039/c9tc05621a
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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