CdS nanoparticles sensitization of Al-doped ZnO nanorod array thin film with hydrogen treatment as an ITO-FTO-free photoanode for solar water splittingReport as inadecuate




CdS nanoparticles sensitization of Al-doped ZnO nanorod array thin film with hydrogen treatment as an ITO-FTO-free photoanode for solar water splitting - Download this document for free, or read online. Document in PDF available to download.

Nanoscale Research Letters

, 7:593

First Online: 25 October 2012Received: 27 August 2012Accepted: 19 October 2012

Abstract

Aluminum-doped zinc oxide AZO nanorod array thin film with hydrogen treatment possesses the functions of transparent conducting oxide thin film and 1-D nanostructured semiconductor simultaneously. To enhance the absorption in the visible light region, it is sensitized by cadmium sulfide CdS nanoparticles which efficiently increase the absorption around 460 nm. The CdS nanoparticles-sensitized AZO nanorod array thin film with hydrogen treatment exhibits significantly improved photoelectrochemical property. After further heat treatment, a maximum short current density of 5.03 mA cm is obtained under illumination. They not only are much higher than those without CdS nanoparticles sensitization and those without Al-doping and-or hydrogen treatment, but also comparable and even slightly superior to some earlier works for the CdS-sensitized zinc oxide nanorod array thin films with indium tin oxide ITO or fluorine-doped tin oxide FTO as substrates. This demonstrated successfully that the AZO nanorod array thin film with hydrogen treatment is quite suitable as an ITO-FTO-free photoanode and has great potentials in solar water splitting after sensitization by quantum dots capable of visible light absorption.

KeywordsAl-doped ZnO nanorod thin film Hydrogen treatment CdS nanoparticles ITO-FTO-free Photoelectrode Solar water splitting Electronic supplementary materialThe online version of this article doi:10.1186-1556-276X-7-593 contains supplementary material, which is available to authorized users.

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Author: Chih-Hsiung Hsu - Dong-Hwang Chen

Source: https://link.springer.com/



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