Here, we demonstrate that carbon quantum dots (CQDs), as a low cost, chemically stable,
and environmentally friendly photosensitizer, can dramatically broaden the light absorption
range to the entire visible range. Consequently, the NiOOH/FeOOH/CQD/BiVO4 (NFCB)
photoanode has achieved a remarkable photocurrent density of 5.99 mA cm− 2 at 1.23 V vs.
RHE under AM 1.5 G in KH2PO4 aqueous solution without a hole scavenger (pH= 7) and a
record high applied bias photon-to-current efficiency of 2.29% at 0.6 V vs. RHE for BiVO4 …

Correction: Carbon quantum dots as a visible light sensitizer to significantly increase the
solar water splitting performance of bismuth vanadate photoanodes - Energy &
Environmental Science (RSC Publishing) … c Department of Chemistry, The Hong Kong
University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China …
Carbon quantum dots as a visible light sensitizer to significantly increase the … …