High efficiency for As-doped cells

Copper-doped cadmium telluride thin-film solar cells have high efficiency, but limited hole density and Cu diffusion allow little room for further improvements in device performance. Now, arsenic-doped cadmium telluride thin films show enhanced hole density and lower dopant diffusivity leading to 20.8%-efficient solar cells.

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Fig. 1: Cathodoluminescence images of cross-sectioned bevels of arsenic-doped thin-film graded-gap CdSeTe solar cells.


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Durose, K. High efficiency for As-doped cells. Nat Energy 4, 825–826 (2019).

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