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Simple Metal-Free Organic D-π-A Dyes with Alkoxy- or Fluorine Substitutions: Application in Dye Sensitized Solar Cells

pmid: 22905490
Two new metal-free organic sensitizers with simplest structural variations have been synthesized for application in nanocrystalline TiO2 sensitized solar cells. The donor-pi-bridge-acceptor (D-pi-A) structure dyes, Y2 and Y3 each designed with three parts, an electron donor unit (substituted phenyl), a linker unit (thiophene), and an anchor unit (cyanoacrylic acid) showed maximal monochromatic incident photon to current conversion efficiencies (IPCE) in a device reaching upto 67% and 82% respectively. The organic sensitizers with 3,4,5-trimethoxy phenyl (Y3) as donor moieties obtained better solar light to electrical energy conversion efficiencies of 3.30% where as the organic sensitizer with 2,4-difluoro phenyl as donor (Y2) showed comparatively lower efficiency of 1.02%. The efficiency obtained with the reference sensitizer N719 under similar fabrication and evaluation conditions was 5.84%.
Titanium, Equipment Design, Fluorine, Nanostructures, Equipment Failure Analysis, Electric Power Supplies, Semiconductors, Metals, Solar Energy, Organic Chemicals, Particle Size, Coloring Agents
Titanium, Equipment Design, Fluorine, Nanostructures, Equipment Failure Analysis, Electric Power Supplies, Semiconductors, Metals, Solar Energy, Organic Chemicals, Particle Size, Coloring Agents
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