Atomic-Level Structural and Electronic Properties of Hybrid Inorganic鈥揙rganic ZnO:Hydroquinone Superlattices Fabricated by ALD/MLD

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• 作者：Antti J. Karttunen ; Tommi Tynell ; Maarit Karppinen
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：June 11, 2015
• 年：2015
• 卷：119
• 期：23
• 页码：13105-13114
• 全文大小：651K
• ISSN：1932-7455

文摘

We investigated crystalline ZnO:hydroquinone (HQ) superlattices grown layer-by-layer by the combined atomic/molecular layer deposition (ALD/MLD) technique; such ALD/MLD layer-engineered inorganic鈥搊rganic thin films form a fundamentally new category of functional coherent hybrid materials that cannot be prepared by any other existing technique. Using quantum chemical methods, we derive atomic-level structural models for the ZnO:HQ superlattices and investigate their structural, spectroscopic, and electronic properties. By comparing the theoretical results with our experimental data we provide a detailed interpretation of experimentally measured infrared spectra, proving the presence of organic interfaces within the crystalline ZnO:HQ superlattices. We moreover show how the band structure of the hybrid material can be tailored by simple and experimentally feasible modifications of the organic constituent. The guidelines for the band-structure engineering of ZnO:HQ superlattices should be valuable for the systematic enhancement and exploitation of the functional properties of ALD/MLD-grown inorganic鈥搊rganic superlattices and nanolaminates in general.