Findings from University of Washington Yields New Findings on Nanosheets [Microsphere Light-Scattering Layer Assembled by ZnO Nanosheets for the Construction of High Efficiency (> 5%) Quantum Dots Sensitized Solar Cells]
By a News Reporter-Staff News Editor at Physics Week -- Researchers detail new data in Nanosheets. According to news reporting originating in Seattle, Washington, by VerticalNews journalists, research stated, "This work reported on a bilayer photoelectrode constructed by ZnO nanoparticle (NP) film and ZnO microsphere (MS) scattering layer for CdS/CdSe quantum dot cosensitized solar cells (QDSCs) with a power conversion efficiency (PCE) of greater than 5%. We controlled the growth orientations of ZnO crystals to form nanosheets, which attached together and assembled into MS due to the high surface energy of the nanosheets."
The news reporters obtained a quote from the research from the University of Washington, "MSs were used as a top layer to effectively increase the light diffuse reflection and harvesting to enhance photogenerated current. In comparison with ZnO NPs photoelectrode, the short circuit current density (J(sc)) of ZnO NPs/MSs photoelectrode increased from 10.3 mA/cm(2) to 16.0 mA/cm(2), which was an enhancement of 55%. To further increase the fill factor and PCE of QDSCs, ZnO NPs/MSs was treated in the solution of H3BO3 and (NH4)(2)TiF6 to form a barrier surface layer, which suppressed the charge recombination and prolonged electron lifetime."
According to the news reporters, the research concluded: "As a result, the solar cell displayed J(sc) of 17.13 mA/cm(2), V-oc of 0.56 V, FF of 0.53, and PCE of 5.08%, one of the highest values for ZnO-based QDSCs at this time."
For more information on this research see: Microsphere Light-Scattering Layer Assembled by ZnO Nanosheets for the Construction of High Efficiency (> 5%) Quantum Dots Sensitized Solar Cells. Journal of Physical Chemistry C, 2014;118(30):16611-16617. Journal of Physical Chemistry C can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of Physical Chemistry C - www.pubs.acs.org/journal/jpccck)
Our news correspondents report that additional information may be obtained by contacting J.J. Tian, University of Washington, Dept. of Mat Sci & Engn, Seattle, WA 98195, United States. Additional authors for this research include L.L. Lv, X.Y. Wang, C.B. Fei, X.G. Liu, Z.X. Zhao, Y.J. Wang and G.Z. Cao.
Keywords for this news article include: Seattle, Washington, Nanosheets, Quantum Dots, United States, Nanotechnology, Quantum Physics, Emerging Technologies, North and Central America
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