Advanced Energy Materials

Beyond 11% effi ciency: Characteristics of state-of-the-art Cu 2ZnSn(S,Se)4Solar Cells

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The authors thank S. Thiruvengadam and A. Bhagat for help with substrate preparation, S. Jay Chey and R. Drake for deposition of ZnO and ITO, R. Ferlita for Ni/Al and MgF2evaporation, S. Mahajan for area measurement, Jemima Gonsalves for TEM sample preparation. This work was conducted as part of a joint development project between Tokyo Ohka Kogyo Co., Ltd., DelSolar Co., Ltd., Solar Frontier K. K. and IBM Corporation. © 2013 WILEY-VCH Verlag GmbH & Co.