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arXiv 1606.03409cond-mat.mtrl-sci
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ZnSnS3:结构预测、铁电性和太阳能电池应用

ZnSnS3 : Structure Prediction, Ferroelectricity, and Solar Cell Applications

Radi A. Jishi, Marcus A. Lucas

摘要:

太阳能产业的快速发展对高性能、高效率的光电材料产生了强烈的需求。许多铁电体由地球上丰富的元素组成,由于其大的内极化,可用于太阳能电池应用。然而,它们的宽带隙阻止它们吸收可见光到中红外范围的光。在这里,我们解决的带隙问题,特别是通过调查,在钙钛矿结构ZnSnO 3中的氧的硫的替代。使用进化的方法,我们确定了ZnSnS 3的稳定和亚稳结构,并将它们与先前表征的ZnSnO 3进行比较。我们的研究结果表明,ZnSnS 3形成的单斜结构,其次是亚稳态钛铁矿和锂-钛酸盐结构。后者的结构是高度极化的,它具有显着降低的带隙为1.28 eV。这些理想的特性使其成为太阳能电池应用的主要候选者。

英文摘要:

The rapid growth of the solar energy industry has produced a strong demand for high performance, efficient photoelectric materials. Many ferroelectrics, composed of earth-abundant elements, are useful for solar cell applications due to their large internal polarization. However, their wide band gaps prevent them from absorbing light in the visible to mid-infrared range. Here, we address the band gap issue by investigating, in particular, the substitution of sulphur for oxygen in the perovskite structure ZnSnO3 . Using evolutionary methods we identify the stable and metastable structures of ZnSnS3 and compare them to those previously characterized for ZnSnO3 . Our results suggest that ZnSnS3 forms a monoclinic structure followed by metastable ilmenite and lithium-niobate structures. The latter structure is highly polarized and it possesses a significantly reduced band gap of 1.28 eV. These desirable characteristics make it a prime candidate for solar cell applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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