Efficient CdPbS Quantum Dots-Sensitized TiO2 Photoelectrodes for Solar Cell Applications

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CdPbS quantum dots-sensitized TiO2 photoelectrode was prepared using chemical bath codeposition technique by dipping TiO2 film into a 0.5 M Cd(NO3)2–Pb(NO3)2 solution (molar ratio 9:1) and a 0.5 M Na2S methanol solution. The CdPbS quantum dots have the size about 4 to 6 nm and distribute homogeneously in the TiO2 film. The as-prepared electrode showed improved absorption spectra. The assembled quantum dots-sensitized solar cell (QDSSC) yielded a power conversion efficiency (η) of 1.88% and a short-circuit current of 15.28 mA/cm2 under AM 1.5 illumination of 100 mW/cm2, far outperformed the single PbS, CdS QDSSC and the η increased 49.2% than coupled PbS/CdS QDSSC. The solar cell presented IPCE peak value of 45.7% and the effective photovoltaic range covers the visible region and near infrared region.


Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.5325

Publication date: November 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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