A new nanomanufactured polymer film based low cost solar cell
25 December 2008A polymer structure called gyroid is found to have a property of self assembling that could lead to development of a low cost photovoltaic cell. Researchers are hopefull to use the technology for making the efficient and cost effective fuel cells.
Ulrich Wiesner and scientists from various universities including Cambridge and Oxford in UK and other institutes have made some variation in Graetzel solar cell, which has a conversion efficiency of 0.7 to 1.7 percent. Although this is low in comparison to around 15 percent conversion efficiency silicon based photo cells, researchers are hopeful to increase the efficiency and convert almost 12 to 15 percent of light falling on these cells to electricity.
Gyroid is one among the four copolymers that can be self assembled and Weisner and his colleagues earlier have developed a block copolymer from one of the ion conductor and the resulting structure was found most efficient conductors.
Researchers took a gyroid copolymer film and after dissolving corkscrew part, the mold was filled with titanium oxide. Now a light sensitive dye was used to fill the material and once the light strikes the dye, electrons are released and these flow towards the crystallized titanium oxide resulting in production and flow of current.
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