Tunable optical properties of hybrid inorganic-organic [(TiO2)m(Ti-O-C6H4-O-)k]n superlattice thin films.
Tunable optical properties of hybrid inorganic-organic [(TiO2)m(Ti-O-C6H4-O-)k]n superlattice thin films.
复制标题
杂化无机-有机[(TiO2)m(Ti-O-C6H4-O-)k]n超晶格薄膜的可调谐光学特性。
作者：
J. Niemelä;M. Karppinen
采用原子层沉积（ALD）和分子层沉积（MLD）相结合的方法，以TiCl 4、水和对苯二酚（HQ）为前驱体制备了无机-有机[（TiO 2）m（Ti-O-C6 H4-O-）k]n薄膜，特别是制备了单分子有机层（k = 1）周期性地夹在较厚TiO 2层（m > 1）之间的超晶格结构。有机层的掺入被发现系统蓝移的光学带隙的TiO 2与减少超晶格周期和-最重要的是-敏化TiO 2层可见光在可见光范围的相当大的一部分低于700 nm，一个事实，这可能是实质性的兴趣为太阳能电池和太阳能电池应用。
A combined atomic layer deposition (ALD) and molecular layer deposition (MLD) process was developed to fabricate inorganic-organic [(TiO2)m(Ti-O-C6H4-O-)k]n thin films from TiCl4, water and hydroquinone (HQ) precursors, and in particular, superlattice structures where single-molecular organic layers (k = 1) are periodically sandwiched between thicker TiO2 layers (m > 1). The incorporation of organic layers was found to systematically blue-shift the optical band gap of TiO2 with decreasing superlattice period and--most importantly--to sensitize the TiO2 layers to visible light over a considerable part of the visible range below 700 nm, a fact that could be of substantial interest for photocatalysis and solar cell applications.