Epitaxial Strain-Induced Growth of CuO at Cu2O/ZnO Interfaces
| Autor: | Edouard Monakhov, Sandeep Gorantla, Spyros Diplas, Jiantuo Gan, Patricia Almeida Carvalho, Kristin Bergum, Anette Eleonora Gunnæs, I. J. T. Jensen, Bengt Gunnar Svensson, Ole Martin Løvvik |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Strain (chemistry) Ionic bonding Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology Epitaxy 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Transmission electron microscopy Phase (matter) 0103 physical sciences Density functional theory Physical and Theoretical Chemistry 0210 nano-technology Layer (electronics) Monoclinic crystal system |
| Zdroj: | The Journal of Physical Chemistry C. 120:23552-23558 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Cu2O/ZnO has been envisaged as a potential material system for the next-generation thin film solar cells. Thus far, the experimental efforts to obtain conversion efficiencies close to the theoretically predicted value have failed. Combining aberration-corrected (scanning) transmission electron microscopy and density functional theory modeling, we studied the interfaces between single-crystal c-axis-oriented ZnO and high-quality magnetron-sputtered Cu2O films. Strikingly, our study shows that the first ∼5 nm of the Cu–oxide films has the structure of the monoclinic CuO phase. The CuO layer is textured with the (111), (111), (111), (111) (111), (111), (111,) and (100) planes parallel to the (0001) and (0001) ZnO interfaces. The ionic arrangement on these planes resembles the hexagonal arrangement of the ZnO interface, and epitaxy exists across the interface. A continued epitaxial growth of [111]-oriented Cu2O follows resulting in epitaxial 180° rotation twins in the Cu2O layer. For the case with t... |
| Databáze: | OpenAIRE |
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