Probing Carrier Dynamics of CdTe/ZnCdSe Intermediate Band Solar Cells by Time Resolved Reflection

ORAL

Abstract

Intermediate band photovoltaic have the potential to overcome the Shockley Queisser limit and potentially can achieve efficiencies as high 63%.  In this work we present time resolved reflectance measurements of intermediate band solar cells made from CdTe fractional monolayer QDs embedded in a ZnCdSe host matrix. The solar cells are grown by molecular beam epitaxy. An intermediate band is formed by incorporating CdTe fractional monolayer QDs embedded in a ZnCdSe host matrix. The type-II band alignment and the lack of a wetting layer make these materials very suitable for IB-devices. A superlattice structure of CdTe/ZnCdSe QDs (100 periods) is presented in which the size and the strain of the QDs are analyzed by X-ray diffraction and is analyzed spectroscopically.

*HRD-2112550

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Presenters

  • Vasilios Deligiannakis

    • City College of New York

Authors

  • Vasilios Deligiannakis

    • City College of New York

  • Guiying He

    • The Graduate Center, City University of New York

  • Milan Begliarbekov

    • The Graduate Center, City University of New York

  • Matthew Y Sfeir

    • The Graduate Center, City University of New York

  • Igor Kuskovsky

    • Queens College, City University of New York

  • Maria C Tamargo

    • The City College of New York