In situ growth of a type-II ZnO/ZnS heterostructure:From stability to band-offset
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917210664992768 |
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| author | de Oliveira, P. R. A Coelho, I. Felix, G. Venezuela, P. Stavale, F. |
| author_facet | de Oliveira, P. R. A Coelho, I. Felix, G. Venezuela, P. Stavale, F. |
| contents | We have successfully obtained a ZnO/ZnS heterostructure by heating a ZnS(001) single crystal in a controlled impurities-free oxygen atmosphere. Combining X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM), we explore the stability, electronic structure, and morphology of that interface. Our XPS measurements reveal a binding energy shift of the core-level peaks, indicating a band-bending effect due to the formation of a hybrid ZnO/ZnS interface. In addition, AFM measurements show that exposure of ZnS single-crystal to an oxygen atmosphere leads to the formation of ZnO/ZnS-like islands. Interestingly, our band-offset estimation suggest a type-II heterostructure arrangement with suitable electronic edges positions that turn ZnO/ZnS heterostructure a promising platform for catalytic applications, particularly hydrogen and oxygen evolution reactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_14499 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | In situ growth of a type-II ZnO/ZnS heterostructure:From stability to band-offset de Oliveira, P. R. A Coelho, I. Felix, G. Venezuela, P. Stavale, F. Materials Science We have successfully obtained a ZnO/ZnS heterostructure by heating a ZnS(001) single crystal in a controlled impurities-free oxygen atmosphere. Combining X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM), we explore the stability, electronic structure, and morphology of that interface. Our XPS measurements reveal a binding energy shift of the core-level peaks, indicating a band-bending effect due to the formation of a hybrid ZnO/ZnS interface. In addition, AFM measurements show that exposure of ZnS single-crystal to an oxygen atmosphere leads to the formation of ZnO/ZnS-like islands. Interestingly, our band-offset estimation suggest a type-II heterostructure arrangement with suitable electronic edges positions that turn ZnO/ZnS heterostructure a promising platform for catalytic applications, particularly hydrogen and oxygen evolution reactions. |
| title | In situ growth of a type-II ZnO/ZnS heterostructure:From stability to band-offset |
| topic | Materials Science |
| url | https://arxiv.org/abs/2506.14499 |