直击问题核心：（Mg,Zn）O异质结构纳米线发光的起源

Getting to the core of the problem: origin of the luminescence from (Mg,Zn)O heterostructured nanowires.

作者信息

Rosenberg Richard A, Shenoy Gopal K, Chisholm Matthew F, Tien Li-Chia, Norton David, Pearton Steven

机构信息

Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA.

出版信息

Nano Lett. 2007 Jun;7(6):1521-5. doi: 10.1021/nl0702923. Epub 2007 May 27.

DOI:10.1021/nl0702923

PMID:17530910

Abstract

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

摘要

我们测量了两种类型的MgxZn(1-x)O核壳异质结构纳米线的时间分辨X射线激发光学发光光谱：I型，x值较小，纤锌矿核心，被x值较大的纤锌矿外壳包裹；II型，纤锌矿核心（x约为0），被岩盐外壳（x>0.62）包裹。通过监测各种发光峰的X射线能量依赖性，我们确定了这些峰起源位点的局部环境。