DataVXThe Journal of Physical Chemistry LettersPaper
journal article·2021-12-30

Heteroepitaxial Growth of a Ta3N5 Thin Film with Clear Anisotropic Optical Properties

Yannan Wang, Yasushi Hirose, Takuto Wakasugi, Yuji Masubuchi, Masato Tsuchii, Yuki Sugisawa, Daiichiro Sekiba, Akira Chikamatsu, Tetsuya Hasegawa

The Journal of Physical Chemistry Letters· Volume 12· Issue 51
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Source abstract

Abstract

Ta 3 N 5 is a promising semiconductor photocatalyst which can generate H 2 gas from water under visible light illumination. It is expected that Ta 3 N 5 exhibits a strong anisotropy in its physical properties stemming from its highly anisotropic crystal structure. However, such anisotropic properties have not been verified experimentally due to the difficulty in synthesizing a large single crystal. Here, we report the synthesis of (010)-oriented Ta 3 N 5 single-crystalline thin films by solid phase epitaxy on the (110) plane of perovskite LaAlO 3 substrates. The obtained epitaxial thin films of Ta 3 N 5 exhibited clear optical anisotropy (pleochroism) as predicted by previous first-principles calculations. The optical gap for E ||[100] polarization (∼2.12 eV) was smaller than that for E ||[100] polarization (∼2.27 eV).
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Research context

Electronic materialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Perovskite Materials and Applications · MXene and MAX Phase Materials

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

Affiliations

Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan

Faculty of Engineering, Hokkaido University, N13 W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan

Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573 Japan

Tandem Accelerator Complex (UTTAC), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan

Department of Chemistry, Faculty of Science, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan

Funding

Japan Society for the Promotion of Science · Yamada Science Foundation

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