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Materials World Network: ZnTeO for Intermediate Band Solar Cells Jamie D. Phillips, University of Michigan Ann Arbor, DMR 1006154.

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  1. Materials World Network:ZnTeO for Intermediate Band Solar Cells Jamie D. Phillips, University of Michigan Ann Arbor, DMR 1006154 Oxygen states in ZnTe result in highly efficient optical transitions approximately 0.5eV from the conduction band edge of ZnTe. These oxygen states may be used to provide intermediate optical transitions for efficient solar energy conversion by providing increased current for sub-bandgap photons while maintaining a voltage that tracks the bandgap of the host material. Solar cells utilizing ZnTeO absorbers have been demonstrated, exhibiting enhanced response below the ZnTebandedge, and not observed for reference cells with ZnTe absorbers. The subbandgap response further exhibits intermediate band solar energy conversion through the observation of photoresponse under subbandgap excitation at wavelengths corresponding to the intermediate spectral bands. EC 0.5eV EO 2.3eV 1.8eV EV

  2. Materials World Network: Intermediate Band Solar Energy ConversionJamie D. Phillips, University of Michigan Ann Arbor, DMR 1006154 A strong collaborative effort has developed between U-M and IES/UPM taking advantage of materials and devices expertise at U-M and photovotlaics expertise at IES/UPM. In addition to contributing to the direct research activities, the complementary expertise is helping to establish new capabilities at each institutions (solar cell characterization at U-M, molecular beam epitaxy and pump-probe ultrafast optical characterization at IES/UPM). Top: Jamie Phillips, Antonio Luque, and Antonio Marti at a visit to a 50 MW solar installation in Puertollano, Spain (May 2011) Bottom: Antonio Marti and members of Jamie Phillips research group outside of the Lurie Nanofabrication Facility at the University of Michigan (Aug. 2011)

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