By a News Reporter-Staff News Editor at Energy Weekly News -- Current study results on Quantum Dots have been published. According to news originating from Hefei, People's Republic of China, by VerticalNews correspondents, research stated, "Successive ionic layer adsorption and reaction (SILAR) is the most extensively used method for the direct and simultaneous synthesis and deposition of quantum dots (QDs) onto porous oxide films for quantum-dot-sensitized solar cell (QDSC) applications. In this work, the noticeable influences of the cationic precursors on the deposition of CdS QDs and the QDSC performance have been studied."
Our news journalists obtained a quote from the research from the China University of Science and Technology, "A careful comparison of two cationic precursors, cadmium nitrate and cadmium acetate, for the preparation of CdS QDSCs by the SILAR method showed that, compared to the commonly used cadmium nitrate, cadmium acetate provided a significantly higher deposition rate of CdS QDs on TiO2 films. A solar cell power conversion efficiency of 2.15% was achieved for a CdS QDSC employing cadmium acetate as the cationic precursor, much higher than the value of 1.44% obtained for the cell prepared using cadmium nitrate for the same number of SILAR cycles. Control experiments in which the recipes of the cationic precursor solutions were changed revealed a dramatic effect of the cationic precursor pH on the deposition rate of CdS QDs on the TiO2 film."
According to the news editors, the research concluded: "In addition, an appreciable anomalous red shift, which became more pronounced with increasing amount of QDs, was observed in both the optical absorption and photocurrent spectra of CdS-sensitized TiO2 films."
For more information on this research see: Influence of Cationic Precursors on CdS Quantum-Dot-Sensitized Solar Cell Prepared by Successive Ionic Layer Adsorption and Reaction. Journal of Physical Chemistry C, 2013;117(51):26948-26956. 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)
The news correspondents report that additional information may be obtained from R. Zhou, China University of Science & Technology, Dept. of Phys, Hefei 230026, People's Republic of China. Additional authors for this research include Q.F. Zhang, J.J. Tian, D. Myers, M. Yin and G.Z. Cao.
Keywords for this news article include: Asia, Hefei, Energy, Chemicals, Chemistry, Solar Cell, Quantum Dots, Nanotechnology, Cadmium Nitrate, Transition Elements, Emerging Technologies, People's Republic of China
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC