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Kesterite Successes, Ongoing Work, and Challenges: A Perspective From Vacuum Deposition

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13 Author(s)
Repins, I.L. ; Nat. Renewable Energy Lab., Golden, CO, USA ; Romero, M.J. ; Li, J.V. ; Su-Huai Wei
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Recent years have seen dramatic improvements in the performance of kesterite devices. The existence of devices of comparable performance, made by a number of different techniques, provides some new perspective on what characteristics are likely fundamental to the material. Here, we review progress in kesterite device fabrication, aspects of the film characteristics that have yet to be understood, and challenges in device development that remain for kesterites to contribute significantly to photovoltaic manufacturing. Performance goals, as well as characteristics of midgap defect density, free carrier density, surfaces, grain boundaries, grain-to-grain uniformity, and bandgap alloying are discussed.

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Photovoltaics, IEEE Journal of  (Volume:3 ,  Issue: 1 )