journal article·2020-11-24

Controllable Thermal Oxidation and Photoluminescence Enhancement in Quasi-1D van der Waals ZrS3 Flakes

Junqing Guo, Jun Tao, Zhouyang Zhang, Linfeng Fei, Ding Li, Jakub Jadwiszczak, Xiting Wang, Yuzheng Guo, Xiaxia Liao, Yangbo Zhou

ACS Applied Electronic Materials· Volume 2· Issue 11
Publisher page

Abstract

In this study, we report on the thermal oxidation of few-layer ZrS3 flakes as a function of temperature and heating time. We characterize the changes to the material crystal structure caused by the thermal treatment using atomic force microscopy, transmission electron microscopy, Raman spectroscopy, and electrical transport measurements and link these results to the observed changes in optical contrast for on-substrate flakes. Importantly, we observe a very strong photoluminescence emission enhancement in the heated samples, with intensities comparable to those of direct-gap monolayer MoS2. We attribute this enhancement to mid-gap states in the thermally synthesized oxides of zirconium which form on the flake surface. We show that this emission is isotropic, unlike that of the untreated ZrS3, which unlocks an additional degree of freedom to the modulation of the optoelectronic properties of quasi-one-dimensional van der Waals materials.
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Research context

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, People’s Republic of China

Jiangxi Engineering Laboratory for Advanced Functional Thin Films and Jiangxi Key Laboratory for Two-Dimensional Materials, Nanchang University, Nanchang, Jiangxi 330031, People’s Republic of China

Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, People’s Republic of China

Department of Electrical Engineering, Columbia University, 500 W 120th Street, New York, New York 10027, United States

School of Electrical Engineering and Automation, Wuhan University, Wuhan, Hubei 430072, People’s Republic of China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Jiangxi Province

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