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氧化物底层对超轻薄水铁矿光阳极析水性能的提升作用。

Enhancement in the performance of ultrathin hematite photoanode for water splitting by an oxide underlayer.

机构信息

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, Switzerland.

出版信息

Adv Mater. 2012 May 22;24(20):2699-702. doi: 10.1002/adma.201104868. Epub 2012 Apr 17.

DOI:10.1002/adma.201104868
PMID:22508522
Abstract

A 2-nm thick Nb(2)O(5) underlayer deposited by atomic layer deposition increases the charge separation efficiency and the photovoltage of ultrathin hematite films by suppressing electron back injection. Absorbed photon-to-current efficiencies (APCE) as high as 40%, which are one of the highest ever reported with hematite photoanodes, are obtained at 400 nm at +1.43 V vs. RHE.

摘要

通过原子层沉积方法沉积的 2nm 厚的 Nb(2)O(5) 下电极可以通过抑制电子反向注入来提高超薄赤铁矿薄膜的电荷分离效率和光电压。在 400nm 处，光电流效率高达 40%，这是赤铁矿光阳极的最高值之一，相对于 RHE 为 +1.43V。

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