Optimizing photocurrent intensity in layered SiGe heterostructures

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-09-09 DOI:10.1088/1361-6641/ad70d4

M T Sultan, M L Ciurea, I Stavarache, K A Thórarinsdóttir, U B Arnalds, V Teodorescu, A Manolescu, S Ingvarsson, H G Svavarsson

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引用次数: 0

Abstract

We study the dependence of photo-spectral intensity on tri- and multilayers of SiO₂/[SiGe [

dSiGe

]/SiO₂]_N with repetitions N = 1 to 10 and thicknesses

dSiGe=5

–100 nm. Photocurrent analysis reveals a bimodal spectral feature. A comparison of the photocurrent analysis between tri- and multilayers shows that in the multilayer structures, the photo-spectral intensity increases with increasing repetition N. The change in intensity could then be further tuned by changing the thickness of the SiGe layers

dSiGe

. We attribute the change in intensity to an increase in tensile strain, along with increased Ge atomic concentration and reduced SiGe-nano cluster size.

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优化层状硅锗异质结构中的光电流强度

我们研究了三层和多层 SiO2/[SiGe[dSiGe]/SiO2]N（重复次数 N = 1 至 10，厚度 dSiGe=5-100 nm）光光谱强度的依赖性。光电流分析显示了双峰光谱特征。对三层和多层结构的光电流分析比较表明，在多层结构中，光光谱强度随着重复次数 N 的增加而增加。我们将强度变化归因于拉伸应变的增加、Ge 原子浓度的增加和 SiGe 纳米团簇尺寸的减小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.