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arXiv 1810.09220cond-mat.mtrl-sci
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杂化密度泛函方法研究功能化GaN(10-10)表面的电子和光学性质

Electronic and Optical Properties of Functionalized GaN (10-10) Surfaces using Hybrid-Density Functionals

Dennis Franke, Michael Lorke, Thomas Frauenheim, Andreia Luisa da Rosa

摘要:

小分子配体在半导体表面的吸附是一种可能的途径来修饰这些表面,使得它们可以用于生物传感和光电子器件。在这项工作中,我们进行密度泛函理论计算的电子和光学性质的GAN-(10 $\bar1$ 0)表面的小配体。从研究的锚基团,我们表明,巯基引入状态的GAN带隙。然而,这些状态不是光学活性的,至少对于这些完美的表面。这意味着需要考虑更真实的表面,以表明表面改性如何增强GAN非极性表面的光学特性。

英文摘要:

Adsorption of small ligands on semiconductor surfaces is a possible route to modify these surfaces so that they can be used in biosensing and optoelectronic devices. In this work we perform density-functional theory calculations of electronic and optical properties of small ligands on GaN-(10$\bar1$0) surfaces. From the investigated anchor groups we show that thiol groups introduce states into the GaN band gap. However, these state are not optically active, at least for these perfect surfaces. This means that more realistic surfaces need to be considered to suggest how surface modification can enhance the optical properties of GaN non-polar surfaces.

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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