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.

中文翻译：

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掺砷电池的高效率

铜掺杂碲化镉薄膜太阳能电池具有很高的效率，但是有限的空穴密​​度和Cu扩散几乎没有空间进一步改善器件性能。现在，掺砷的碲化镉薄膜显示出更高的空穴密度和更低的掺杂剂扩散率，从而产生了效率为20.8％的太阳能电池。