Details
| Original language | English |
|---|---|
| Pages (from-to) | 2400-2410 |
| Number of pages | 11 |
| Journal | Journal of Materials Chemistry C |
| Volume | 8 |
| Issue number | 7 |
| Publication status | Published - 30 Dec 2019 |
Abstract
In this work, density functional theory calculations were carried out to explore the mechanical response, dynamical/thermal stability, electronic/optical properties and photocatalytic features of monoclinic As2X3 (X = S, Se and Te) nanosheets. Acquired phonon dispersions and ab initio molecular dynamics results confirm the stability of the studied nanomembranes. Observation of relatively weak interlayer interactions suggests that exfoliation techniques can be potentially employed to fabricate nanomembranes from their bulk counterparts. The studied nanosheets were found to show highly anisotropic mechanical properties. Notably, a new As2Te3 2D lattice predicted by this study is found to exhibit unique superstretchability, which outperforms other 2D materials. In addition, our results on the basis of the HSE06 functional reveal the indirect semiconducting electronic nature for the monolayer to few-layer and bulk structures of As2X3, in which a moderate decreasing trend in the band-gap by increasing the thickness can be established. The studied nanomaterials were found to show remarkably high and anisotropic carrier mobilities. Moreover, optical results show that these nanosheets can absorb visible light. In particular, the valence and conduction band edge positions, high carrier mobilities and optical responses of As2Se3 nanosheets were found to be highly desirable for solar water splitting. The comprehensive vision provided by this study not only confirms the stability and highly attractive electronic and optical characteristics of As2S3, As2Se3 and As2Te3 nanosheets, but also offers new possibilities to design superstretchable nanodevices.
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Materials Chemistry
Sustainable Development Goals
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In: Journal of Materials Chemistry C, Vol. 8, No. 7, 30.12.2019, p. 2400-2410.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - As2S3, As2Se3 and As2Te3 nanosheets
T2 - Superstretchable semiconductors with anisotropic carrier mobilities and optical properties
AU - Mortazavi, Bohayra
AU - Shojaei, Fazel
AU - Azizi, Maryam
AU - Rabczuk, Timon
AU - Zhuang, Xiaoying
N1 - Funding information: B. M. and X. Z. appreciate the funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453).
PY - 2019/12/30
Y1 - 2019/12/30
N2 - In this work, density functional theory calculations were carried out to explore the mechanical response, dynamical/thermal stability, electronic/optical properties and photocatalytic features of monoclinic As2X3 (X = S, Se and Te) nanosheets. Acquired phonon dispersions and ab initio molecular dynamics results confirm the stability of the studied nanomembranes. Observation of relatively weak interlayer interactions suggests that exfoliation techniques can be potentially employed to fabricate nanomembranes from their bulk counterparts. The studied nanosheets were found to show highly anisotropic mechanical properties. Notably, a new As2Te3 2D lattice predicted by this study is found to exhibit unique superstretchability, which outperforms other 2D materials. In addition, our results on the basis of the HSE06 functional reveal the indirect semiconducting electronic nature for the monolayer to few-layer and bulk structures of As2X3, in which a moderate decreasing trend in the band-gap by increasing the thickness can be established. The studied nanomaterials were found to show remarkably high and anisotropic carrier mobilities. Moreover, optical results show that these nanosheets can absorb visible light. In particular, the valence and conduction band edge positions, high carrier mobilities and optical responses of As2Se3 nanosheets were found to be highly desirable for solar water splitting. The comprehensive vision provided by this study not only confirms the stability and highly attractive electronic and optical characteristics of As2S3, As2Se3 and As2Te3 nanosheets, but also offers new possibilities to design superstretchable nanodevices.
AB - In this work, density functional theory calculations were carried out to explore the mechanical response, dynamical/thermal stability, electronic/optical properties and photocatalytic features of monoclinic As2X3 (X = S, Se and Te) nanosheets. Acquired phonon dispersions and ab initio molecular dynamics results confirm the stability of the studied nanomembranes. Observation of relatively weak interlayer interactions suggests that exfoliation techniques can be potentially employed to fabricate nanomembranes from their bulk counterparts. The studied nanosheets were found to show highly anisotropic mechanical properties. Notably, a new As2Te3 2D lattice predicted by this study is found to exhibit unique superstretchability, which outperforms other 2D materials. In addition, our results on the basis of the HSE06 functional reveal the indirect semiconducting electronic nature for the monolayer to few-layer and bulk structures of As2X3, in which a moderate decreasing trend in the band-gap by increasing the thickness can be established. The studied nanomaterials were found to show remarkably high and anisotropic carrier mobilities. Moreover, optical results show that these nanosheets can absorb visible light. In particular, the valence and conduction band edge positions, high carrier mobilities and optical responses of As2Se3 nanosheets were found to be highly desirable for solar water splitting. The comprehensive vision provided by this study not only confirms the stability and highly attractive electronic and optical characteristics of As2S3, As2Se3 and As2Te3 nanosheets, but also offers new possibilities to design superstretchable nanodevices.
UR - http://www.scopus.com/inward/record.url?scp=85081051591&partnerID=8YFLogxK
U2 - 10.1039/c9tc05904k
DO - 10.1039/c9tc05904k
M3 - Article
AN - SCOPUS:85081051591
VL - 8
SP - 2400
EP - 2410
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
SN - 2050-7534
IS - 7
ER -