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Trade-Offs in Thin Film Solar Cells with Layered Chalcostibite Photovoltaic Absorbers

机译:层状黄铜矿光伏吸收器在薄膜太阳能电池中的取舍

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摘要

Discovery of novel semiconducting materials is needed for solar energy conversion and other optoelectronic applications. However, emerging low-dimensional solar absorbers often have unconventional crystal structures and unusual combinations of optical absorption and electrical transport properties, which considerably slows down the research and development progress. Here, the effect of stronger absorption and weaker carrier collection of 2D-like absorber materials are studied using a high-throughput combinatorial experimental approach, complemented by advanced characterization and computations. It is found that the photoexcited charge carrier collection in CuSbSe2 solar cells is enhanced by drift in an electric field, addressing a different absorption/collection balance. The resulting drift solar cells efficiency is <5% due to inherent J(SC)/V-OC trade-off, suggesting that improved carrier diffusion and better contacts are needed to further increase the CuSbSe2 performance. This study also illustrates the advantages of high-throughput experimental methods for fast optimization of the optoelectronic devices based on emerging low-dimensional semiconductor materials.
机译:太阳能转换和其他光电应用需要发现新型半导体材料。然而,新兴的低尺寸太阳能吸收器通常具有非常规的晶体结构以及光吸收和电传输性质的不寻常组合,这大大减慢了研发进度。在这里,使用高通量组合实验方法研究了2D类吸收剂材料吸收更强和载体收集较弱的效果,并辅以高级表征和计算。发现通过电场的漂移增强了CuSbSe2太阳能电池中的光激发电荷载流子收集,从而解决了不同的吸收/收集平衡。由于固有的J(SC)/ V-OC折衷,最终的漂移太阳能电池效率<5%,这表明需要改善载流子扩散和更好的接触以进一步提高CuSbSe2性能。这项研究还说明了高通量实验方法在基于新兴的低维半导体材料的光电器件快速优化方面的优势。

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  • 来源
    《Advanced energy materials》 |2017年第11期|1601935.1-1601935.7|共7页
  • 作者单位

    Natl Renewable Energy Lab, Golden, CO 80401 USA|Colorado Sch Mines, Golden, CO 80401 USA;

    Natl Renewable Energy Lab, Golden, CO 80401 USA|Colorado Sch Mines, Golden, CO 80401 USA;

    Natl Renewable Energy Lab, Golden, CO 80401 USA;

    Helmholtz Zentrum Berlin, D-14109 Berlin, Germany;

    Helmholtz Zentrum Berlin, D-14109 Berlin, Germany;

    Helmholtz Zentrum Berlin, D-14109 Berlin, Germany;

    Natl Renewable Energy Lab, Golden, CO 80401 USA;

    Colorado Sch Mines, Golden, CO 80401 USA;

    Natl Renewable Energy Lab, Golden, CO 80401 USA;

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