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Enabling Highly Efficient Photocatalytic Hydrogen Generation and Organics Degradation via a Perovskite Solar Cell-Assisted Semiconducting Nanocomposite Photoanode

Abstract

Organometal trihalide perovskite solar cells (PSCs) have been widely recognized as a promising photovoltaic device due to an impressive set of outstanding excellent optoelectronic properties of perovskites. However, the instability and intermittent energy output caused by the intensity fluctuation and/or the daily cycle of sunlight have motivated the direct application of PSCs in other energy fields. Here, we report an integrated solar-energy-conversion/water-splitting device comprising a single-junction PSC and a CdS-decorated TiO2 nanorod arrays (i.e. semiconducting CdS/TiO2 NRAs nanocomposite) photoanode with excellent photoelectrochemical (PEC) performance. Intriguingly, the introduction of PSC is found to effectively suppress the recombination of electrons and holes during the PEC catalytic process. As a result, the integrated device yields an overall solar-to-hydrogen efficiency of 1.54%, and exhibits a sixfold increase in the degradation rate of methylene blue over the CdS/TiO2 NRAs alone. As such, the crafting of a perovskite solar cell-assisted nanocomposite semiconductor photoanode may represent a viable route to alleviating the electron-hole recombination in water splitting and degradation of organic pollutants, thus rendering the effective implementation of PSCs.

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Publication details

The article was received on 15 Sep 2018, accepted on 06 Nov 2018 and first published on 06 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA08998A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Enabling Highly Efficient Photocatalytic Hydrogen Generation and Organics Degradation via a Perovskite Solar Cell-Assisted Semiconducting Nanocomposite Photoanode

    X. Liu, Y. Wang, X. Cui, M. Zhang, B. Wang, M. Rager, Z. Shu, Y. Yang, Z. Li and Z. Lin, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA08998A

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