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arXiv 1702.08201cond-mat.mes-hall
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Al0.3Ga 0.7 N/ GaN多量子盘核/壳纳米线的发光:数值方法

Luminescence Emission from Al0.3Ga0.7N/GaN Multi Quantum Disc core/shell Nanowire: Numerical approach

E. Namvari, S. Shojaei, A. Asgari

摘要:

在这项工作中,一个数值方法来研究室温下的发光发射的芯/壳纳米线,GAN量子盘(QDiscs),周期性地分布在AlxGa 1-xN纳米线,被认为是核心和AlxGa 1-xN作为外壳。薄的盘形(环形)n掺杂区已被放置在GAN/AlxGa 1-xN(AlxGa 1-xN /空气)界面处的AlxGa 1-xN区中的轴向(径向)方向。为了获得能级和相关的波函数,自洽程序已被用于解决薛定谔泊松方程考虑自发和压电极化。然后对发光光谱进行了详细的研究,以识别影响发光的参数。结果表明,掺杂量、量子盘尺寸和数量对带间发光有显著影响。我们的数值计算给出了一些见解的核/壳纳米线的发光发射,并展示了一个有用的工具,分析实验中的发现。

英文摘要:

In this work, a numerical approach to investigate the room temperature luminescence emission from core/shell nanowire is presented where GaN quantum discs (QDiscs), periodically distributed in AlxGa1-xN nanowire, is considered as core and AlxGa1-xN as shell. Thin disk shaped (Ring shaped) n-doped region has been placed at the GaN/ AlxGa1-xN (AlxGa1-xN /air) interface in AlxGa1-xN region in axial (radial) directions. To obtain energy levels and related wavefunctions, self-consistent procedure has been employed to solve Schrodinger-Poisson equations with considering the spontaneous and piezoelectric polarization. Then luminescence spectrum is studied in details to recognize the parameters influent in luminescence. The results show that the amount of doping, size of QDiscs and theirs numbers have remarkable effects on the band to band luminescence emission. Our numerical calculations gives some insights into the luminescence emission of core/shell nanowire and exhibits a useful tool to analyze findings in experiments.

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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