By a News Reporter-Staff News Editor at Physics Week -- Fresh data on Applied Physics are presented in a new report. According to news reporting from Tarragona, Spain, by VerticalNews journalists, research stated, "Ordered bulk heterojunction organic solar cells are devices that combine the advantages of the planar bilayer and the bulk heterojunction architectures. They offer uninterrupted pathways to electrodes for effective charge collection and an extended Donor-Acceptor interface for efficient exciton dissociation."
The news correspondents obtained a quote from the research from the University of Rovira and Virgili, "Additionally, this interface can also be a potential approach to increase photon absorption by light trapping. Light absorption and charge carrier generation of organic nanostructures are studied by means of finite-element modeling for a wide range of structuring widths, periods and heights for poly(3-hexylthiophene): 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6) C-61 (P3HT:PCBM) structures. Results show an increase in light absorption at certain wavelengths in the P3HT region with respect to an equivalent planar bilayer model. This increase can be attributed to two phenomena: for the smallest periods the structures behaves like an effective medium, while for periods of the order of magnitude of the incident light wavelength there is light trapping. The maximum increase in absorption was achieved for a 250 nm-width and 500 nm periodicity structure with a height of 40 nm. Exciton diffusion has also been studied to evaluate the effective amount of absorbed light contributing to photocurrent. In this case, best results correspond to the smallest sizes (1.25-12.5 nm-width) for all the considered heights, achieving an increment in the photocurrent up to more than a factor 6 if compared with that of the reference planar bilayer device."
According to the news reporters, the research concluded: "This study can be used to optimize our devices, which are achieved via nanoporous anodic alumina templates."
For more information on this research see: Light absorption modeling of ordered bulk heterojunction organic solar cells. Current Applied Physics, 2013;13(8):1801-1807. Current Applied Physics can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Current Applied Physics - www.elsevier.com/wps/product/cws_home/621284)
Our news journalists report that additional information may be obtained by contacting P. Granero, Univ Rovira & Virgili, Dept. of Engn Elect Elect & Automat, Nanoelect & Photon Syst NePhoS, E-43007 Tarragona, Spain. Additional authors for this research include V.S. Balderrama, J. Ferre-Borrull, J. Pallares and L.F. Marsal.
Keywords for this news article include: Spain, Europe, Tarragona, Applied Physics
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