Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy Harvesting
Abstract With the emergence of electromechanical devices, considerable efforts have been devoted to improving the piezoelectricity of 2D materials. Herein, an anion‐doping approach is proposed as an effective way to enhance the piezoelectricity of α‐In2Se3 nanosheets, which has a rare asymmetric str...
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Wiley
2025-01-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202410851 |
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| author | Ji Yeon Kim Woohyun Hwang Seo Yeon Han Ye Seul Jung Fengyi Pang Wenhu Shen Cheolmin Park Sang‐Woo Kim Aloysius Soon Yong Soo Cho |
| author_facet | Ji Yeon Kim Woohyun Hwang Seo Yeon Han Ye Seul Jung Fengyi Pang Wenhu Shen Cheolmin Park Sang‐Woo Kim Aloysius Soon Yong Soo Cho |
| author_sort | Ji Yeon Kim |
| collection | DOAJ |
| description | Abstract With the emergence of electromechanical devices, considerable efforts have been devoted to improving the piezoelectricity of 2D materials. Herein, an anion‐doping approach is proposed as an effective way to enhance the piezoelectricity of α‐In2Se3 nanosheets, which has a rare asymmetric structure in both the in‐plane and out‐of‐plane directions. As the O2 plasma treatment gradually substitutes selenium with oxygen, it changes the crystal structure, creating a larger lattice distortion and, thus, an extended dipole moment. Prior to the O2 treatment, the lattice extension is deliberately maximized in the lateral direction by imposing in situ tensile strain during the exfoliation process for preparing the nanosheets. Combining doping and strain engineering substantially enhances the piezoelectric coefficient and electromechanical energy conversion. As a result, the optimal harvester with a 0.9% in situ strain and 10 min plasma exposure achieves the highest piezoelectric energy harvesting values of ≈13.5 nA and ≈420 µW cm−2 under bending operation, outperforming all previously reported 2D materials. Theoretical estimation of the structural changes and polarization with gradual oxygen substitution supports the observed dependence of the electromechanical performance. |
| format | Article |
| id | doaj-art-faaac60d14e34990ac29eb79c00fefbb |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-faaac60d14e34990ac29eb79c00fefbb2025-01-20T13:04:18ZengWileyAdvanced Science2198-38442025-01-01123n/an/a10.1002/advs.202410851Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy HarvestingJi Yeon Kim0Woohyun Hwang1Seo Yeon Han2Ye Seul Jung3Fengyi Pang4Wenhu Shen5Cheolmin Park6Sang‐Woo Kim7Aloysius Soon8Yong Soo Cho9Department of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaDepartment of Materials Science and Engineering Yonsei University Seoul 03722 Republic of KoreaAbstract With the emergence of electromechanical devices, considerable efforts have been devoted to improving the piezoelectricity of 2D materials. Herein, an anion‐doping approach is proposed as an effective way to enhance the piezoelectricity of α‐In2Se3 nanosheets, which has a rare asymmetric structure in both the in‐plane and out‐of‐plane directions. As the O2 plasma treatment gradually substitutes selenium with oxygen, it changes the crystal structure, creating a larger lattice distortion and, thus, an extended dipole moment. Prior to the O2 treatment, the lattice extension is deliberately maximized in the lateral direction by imposing in situ tensile strain during the exfoliation process for preparing the nanosheets. Combining doping and strain engineering substantially enhances the piezoelectric coefficient and electromechanical energy conversion. As a result, the optimal harvester with a 0.9% in situ strain and 10 min plasma exposure achieves the highest piezoelectric energy harvesting values of ≈13.5 nA and ≈420 µW cm−2 under bending operation, outperforming all previously reported 2D materials. Theoretical estimation of the structural changes and polarization with gradual oxygen substitution supports the observed dependence of the electromechanical performance.https://doi.org/10.1002/advs.2024108512D materialsα‐In2Se3oxygen plasmapiezoelectric energy harvestingstrain engineering |
| spellingShingle | Ji Yeon Kim Woohyun Hwang Seo Yeon Han Ye Seul Jung Fengyi Pang Wenhu Shen Cheolmin Park Sang‐Woo Kim Aloysius Soon Yong Soo Cho Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy Harvesting Advanced Science 2D materials α‐In2Se3 oxygen plasma piezoelectric energy harvesting strain engineering |
| title | Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy Harvesting |
| title_full | Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy Harvesting |
| title_fullStr | Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy Harvesting |
| title_full_unstemmed | Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy Harvesting |
| title_short | Oxygen‐Doped 2D In2Se3 Nanosheets with Extended In‐Plane Lattice Strain for Highly Efficient Piezoelectric Energy Harvesting |
| title_sort | oxygen doped 2d in2se3 nanosheets with extended in plane lattice strain for highly efficient piezoelectric energy harvesting |
| topic | 2D materials α‐In2Se3 oxygen plasma piezoelectric energy harvesting strain engineering |
| url | https://doi.org/10.1002/advs.202410851 |
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