Enabling highly efficient photocatalytic hydrogen generation and organics degradation via a perovskite solar cell-assisted semiconducting nanocomposite photoanode
Organometal trihalide perovskite solar cells (PSCs) have been widely recognized as a promising photovoltaic device due to their impressive set of outstanding excellent optoelectronic properties. However, the instability and intermittent energy output caused by the intensity fluctuation and/or the da...
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Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (1), p.165-171 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Organometal trihalide perovskite solar cells (PSCs) have been widely recognized as a promising photovoltaic device due to their impressive set of outstanding excellent optoelectronic properties. 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 CdS-decorated TiO
2
nanorod array (
i.e.
, semiconducting CdS/TiO
2
NRA 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 six-fold increase in the degradation rate of methylene blue over that of the CdS/TiO
2
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 the degradation of organic pollutants, thus rendering the effective implementation of PSCs. |
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ISSN: | 2050-7488 2050-7496 |
DOI: | 10.1039/C8TA08998A |