Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 18, Issue 23, Pages 15815-15821Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp00854b
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Funding
- University Grant Commission (UGC), India [F.2-6/2004(SA-I)]
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The effect of lead sulfide (PbS) quantum dots (QDs) on the photoelectrochemical properties of TiO2 with a varied number of SILAR cycles has been investigated. The study has also highlighted physical processes including band alignment, charge recombination and transportation for a PbS QDs/TiO2 interface. The inclusion of PbS QDs underneath TiO2 thin film has significantly enhanced the PEC response due to a higher number of photogenerated charge carriers along with the efficient separation and facilitation of these carriers towards their respective electrodes. The uniqueness of the work lies in the high stability of the system as PbS QDs lie beneath the TiO2 thin film, compared to the commonly used QDs sensitization over metal oxide, along with a good photoresponse.
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