QD co-sensitized and nitrogen doped TiO[sub]2[/sub] nanocomposite for photoelectrochemical hydrogen generation

Jennifer Hensel; Max Canin; Jin Z. Zhang

doi:10.1117/12.859472

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24 August 2010 QD co-sensitized and nitrogen doped TiO₂ nanocomposite for photoelectrochemical hydrogen generation

Jennifer Hensel, Max Canin, Jin Z. Zhang

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Proceedings Volume 7770, Solar Hydrogen and Nanotechnology V; 777012 (2010) https://doi.org/10.1117/12.859472
Event: SPIE Solar Energy + Technology, 2010, San Diego, California, United States

Abstract

Metal oxides are promising for solar energy conversion applications since they are less expensive and easier to produce than conventional single crystal silicon. In this paper we focused on CdSe and CdS quantum dot (QD) co-sensitized and nitrogen doped TiO₂ (N:TiO₂) nanocomposite photoanodes for photoelectrochemical (PEC) water splitting for hydrogen generation. PEC, UV-vis and scanning electron microscopy (SEM) characterizations of the nanostructured films were carried out. The QD co-sensitized and N-doped TiO₂ photoanodes exhibits increased photocurrent compared to cosensitized TiO₂ without N-doping This is tentatively attributed to enhanced hole transport by oxygen vacancy states that are increased upon nitrogen doping. The enhanced hole transport facilitates overall charge transfer and transport and thereby results in improved photocurrent.

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Jennifer Hensel, Max Canin, and Jin Z. Zhang "QD co-sensitized and nitrogen doped TiO₂ nanocomposite for photoelectrochemical hydrogen generation", Proc. SPIE 7770, Solar Hydrogen and Nanotechnology V, 777012 (24 August 2010); https://doi.org/10.1117/12.859472

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