arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.0879cond-mat.mtrl-sci
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Si3AlP:一种新型太阳能电池吸收材料

Si3AlP: A new promising material for solar cell absorber

Ji-Hui Yang, Yingteng Zhai, Hengrui Liu, Hongjun Xiang, Xingao Gong, Su-Huai Wei

摘要:

采用第一性原理计算研究了新合成的晶格匹配的非等价(Si 2)0.6(AlP)0.4合金的结构和光电性质[T. Watkins等人,J. Am. 2011,133,16212.]结果表明,在实验观察到的晶胞中,以1个P原子为基本单元,3个Si原子和1个Al原子为外围的有序CC-Si 3AlP是最稳定的。1 Si 3AlP具有比Si更大的基本带隙和更小的直接带隙,因此在可见光区具有更高的吸收。计算的Si 3AlP的性质表明,它是一个有前途的候选人,以改善现有的硅基太阳能电池的性能。本研究所获得的稳定性和能带结构工程的理解是普遍的,可以应用于未来的研究,其他非等价和晶格匹配的半导体合金。

英文摘要:

First-principles calculations are performed to study the structural and optoelectronic properties of the newly synthesized nonisovalent and lattice-matched (Si2)0.6(AlP)0.4 alloy [T. Watkins et al., J. Am. Chem. Soc. 2011, 133, 16212.] We find that the ordered CC-Si3AlP with a basic unit of one P atom surrounded by three Si atoms and one Al atom is the most stable one within the experimentally observed unit cell.1 Si3AlP has a larger fundamental band gap and a smaller direct band gap than Si, thus it has much higher absorption in the visible light region. The calculated properties of Si3AlP suggest that it is a promising candidate for improving the performance of the existing Si-based solar cells. The understanding on the stability and band structure engineering obtained in this study is general and can be applied for future study of other nonisovalent and lattice-matched semiconductor alloys.

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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