Using a 10 nm thick molybdenum oxide (MoO3−x) layer as a transparent and low barrier contact to p-CdTe, we demonstrate nanowire CdS-CdTe solar cells with a power conversion efficiency of 11% under front side illumination. Annealing the as-deposited MoO3 film in N2 resulted in a reduction of the cell’s series resistance, from 9.97 Ω/cm2 to 7.69 Ω/cm2, and increase in efficiency from 9.9% to 11%. Under illumination from the back, the MoO3−x/Au side, the nanowire solar cells yielded Jsc of 21 mA/cm2 and efficiency of 8.67%. Our results demonstrate use of a thin layer transition metal oxide as a potential way for a transparent back contact to nanowire CdS-CdTe solar cells. This work has implications toward enabling a novel superstrate structure nanowire CdS-CdTe solar cell on Al foil substrate by a low cost roll-to roll fabrication process.
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机译：使用10μnm厚的氧化钼（MoO3-x）层作为对p-CdTe的透明且低势垒接触，我们证明了纳米线CdS-CdTe太阳能电池在正面照明下的功率转换效率为11％。在N2中退火沉积的MoO3薄膜会导致电池的串联电阻从9.97Ω/ cm 2 降低到7.69Ω/ cm 2 ，并提高了效率从9.9％升至11％。在背面，MoO3-x / Au侧照射下，纳米线太阳能电池的Jsc为21 mA / cm 2 ，效率为8.67％。我们的结果证明了使用薄层过渡金属氧化物作为与纳米线CdS-CdTe太阳能电池进行透明背接触的潜在方法。这项工作对通过低成本的卷对卷制造工艺在Al箔基板上实现新型超结构纳米线CdS-CdTe太阳能电池具有重要意义。
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