Getting to the Core of the Problem: Origin of the Luminescence from (Mg,Zn)O Heterostructured Nanowires

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• 作者：Richard A. Rosenberg ; Gopal K. Shenoy ; Matthew F. Chisholm ; Li-Chia Tien ; David Norton ; Steven Pearton
• 刊名：Nano Letters
• 出版年：2007
• 出版时间：June 2007
• 年：2007
• 卷：7
• 期：6
• 页码：1521 - 1525
• 全文大小：204K
• 年卷期：v.7,no.6(June 2007)
• ISSN：1530-6992

文摘

We have measured the time-resolved, X-ray excited optical luminescence spectra from two types of Mg_xZn_(1-x)O core-shell, heterostructurednanowires: type I, with a small x, wurtzite core, encased in a larger x, wurtzite sheath; and type II, with a wurtzite core (x ~ 0), encased ina rock-salt sheath (x > 0.62). By monitoring the X-ray energy dependence of the various luminescence peaks, we have determined the localenvironment of the sites where these peaks originate.