1 February 2017 W ion implantation boosting visible-light photoelectrochemical water splitting over ZnO nanorod arrays
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Abstract
W ions were doped into ZnO nanorod arrays hydrothermally grown on the F-doped tin-oxide-coated glass substrates via an advanced ion implantation technique for photoelectrochemical (PEC) water splitting under visible light. It was found that W incorporation could narrow the bandgap of ZnO and shift the optical absorption into visible light regions obviously, with the one-dimensional nanorod structure maintained for superior charge transfer. As a result, the W-doped ZnO nanorod arrays exhibit considerable PEC performance relative to ZnO nanorod arrays under visible light illumination ( λ > 420    nm ), with photocurrent density achieved up to 15.2    μ A / cm 2 at 1.0 V (versus Ag/AgCl). The obtained PEC properties indicate that ion implantation can be an alternative approach to develop unique materials for efficient solar energy conversion.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Li Cai, Wu Zhou, Feng Ren, Jie Chen, Guangxu Cai, Yichao Liu, Xiangjiu Guan, Shaohua Shen, "W ion implantation boosting visible-light photoelectrochemical water splitting over ZnO nanorod arrays," Journal of Photonics for Energy 7(1), 016501 (1 February 2017). https://doi.org/10.1117/1.JPE.7.016501 . Submission: Received: 30 November 2016; Accepted: 16 January 2017
Received: 30 November 2016; Accepted: 16 January 2017; Published: 1 February 2017
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