Carbon quantum dots decorated Cu2S nanowire arrays for enhanced photoelectrochemical performance



    The photoelectrochemical (PEC) performance of Cu2S nanowire arrays (NWAs) has been demonstrated to be greatly enhanced by dipping-assembly of carbon quantum dots (CQDs) on the surfaces of Cu2S NWAs. The CQDs decorated Cu2S NWAs exhibit remarkably enhanced photocurrent density, giving a photocurrent density of 1.05 mA cm−2 at 0 V vs. NHE and an optimal photocathode efficiency of 0.148% under illumination of AM 1.5G (100 mW cm−2), which is 4 times higher than that of the pristine Cu2S NWAs. This can be attributed to the improved electron transfer and the energy-down-shift effect of CQDs. We believe that this inexpensive Cu2S/CQD photocathode with increased photocurrent density opens up new opportunities in PEC water splitting.

    You can find out more about their work by reading the article in Nanoscale. Carbon quantum dots decorated Cu2S nanowire arrays for enhanced photoelectrochemical performance, Nanoscale,  2016, 8, 8559-8567. (Cover article)

    DOI: 10.1039/C5NR06908D

 


 

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