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首页> 外文会议>Symposium on Microcrystalline and Nanocrystalline Semiconductors-1998 held November 30-December 3, 1998, Boston, Massachusetts, U.S.A. >Optically detected magnetic resonance and double beam photoluminescence of CdS/HgS/CdS nanoparticles
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Optically detected magnetic resonance and double beam photoluminescence of CdS/HgS/CdS nanoparticles

机译：CdS / HgS / CdS纳米粒子的光学检测磁共振和双光束光致发光

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摘要

CdS/HgS/CdS nanoparticles consist of a CdS core, epitaxially covered by one or two monolayers of HgS and additional cladding layers of CdS. The present paper describes our efforts to identify the influence of CdS/HgS/CdS interfaces on the localization of the photogenerated carriers deduced from the magneto-optical properties of the materials. These were investigated by the utilization of optically detected magnetic resonance (ODMR) and double-beam photoluminescence spectroscopy. A photoluminescence (PL) spectrum of the studied material, consists of a dominant exciton located at the HgS layer, and additional non-excitonic band, presumably corresponding to the recombination of trapped carriers at the interface. The latter band can be attenuated using an additional red excitation. The ODMR measurements show the existence of two kinds of electron-hole recombination. These electron-hole pairs maybe trapped either at a twin packing of a CdS/HgS interface, or at an edge dislocation of an epitaxial HgS or a CdS cladding layer.
机译：CdS / HgS / CdS纳米粒子由一个CdS核心组成，外延地被一层或两层HgS单层和另外的CdS包覆层覆盖。本文介绍了我们的工作，以确定CdS / HgS / CdS界面对从材料的磁光特性推导的光生载流子局部化的影响。这些是通过利用光学检测磁共振（ODMR）和双光束光致发光光谱法进行研究的。被研究材料的光致发光（PL）光谱由位于HgS层的主要激子和附加的非激子带组成，大概对应于界面处捕获的载流子的重组。后面的波段可以使用额外的红色激发来衰减。 ODMR测量结果表明存在两种电子-空穴复合。这些电子-空穴对可能被捕获在CdS / HgS界面的孪生堆积处，或者被捕获在外延HgS或CdS包层的边缘错位处。

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