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Efficiency record for flexible CdTe solar cell due to novel polyimide film
Date:6/9/2011

t efficiency, the highest value before the recent improvement to 13.8 percent). Only a few weeks ago Tiwari's team also set a new world record in energy efficiency (of 18.7 percent) for another type of flexible solar cells based on copper indium gallium (di)selenide (also known as CIGS).

"Finding a film that could both be transparent and withstand high processing temperatures was a challenge initially, but the new Kapton colorless polyimide film had both the tolerance for high temperatures needed, and higher light transmittance due to its transparency that allowed it to exceed our previous world record in conversion efficiency of flexible CdTe solar cell," said Ayodhya N. Tiwari, head of the laboratory. "As we continue to raise the standards for PV efficiency, materials make a distinct difference in the progress we make toward achieving grid parity. Of course, further development is needed for addressing cost and stability issues." Tiwari plans to present a technical paper on the full findings at the 26th European Photovoltaic Solar Energy Conference and Exhibition in Hamburg, Germany, being held Sept. 5𔃇, 2011.


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Contact: Professor Dr. Ayodhya N. Tiwari
ayodhya.tiwari@empa.ch
41-587-654-130
Swiss Federal Laboratories for Materials Science and Technology (EMPA)
Source:Eurekalert

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