Journal
NANO LETTERS
Volume 7, Issue 3, Pages 676-680Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl0627238
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Single wall carbon nanotube (SWCNT) architecture when employed as conducting scaffolds in a TiO2 semiconductor based photoelectrochemical cell can boost the photoconversion efficiency by a factor of 2. Titanium dioxide nanoparticles were dispersed on SWCNT films to improve photoinduced charge separation and transport of carriers to the collecting electrode surface. The shift of similar to 100 mV in apparent Fermi level of the SWCNT-TiO2 system as compared to the unsupported TiO2 system indicates the Fermi level equilibration between the two systems. The interplay between the TiO2 and SWCNT of attaining charge equilibration is an important factor for improving photoelectrochemical performance of nanostructured semiconductor based solar cells. The feasibility of employing a SWCNT-TiO2 composite to drive the water photoelectrolysis reaction has also been explored.
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