杂化二氧化硅包覆碲化镉纳米晶中的俄歇复合动力学。

Auger recombination dynamics in hybrid silica-coated CdTe nanocrystals.

机构信息

Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan.

出版信息

Phys Chem Chem Phys. 2011 Feb 28;13(8):3227-30. doi: 10.1039/c0cp01957g. Epub 2011 Jan 14.

DOI:10.1039/c0cp01957g

PMID:21234501

Abstract

CdTe quantum dots coated with a silica layer containing CdS-like clusters exhibit intense photoluminescence and a spectral red-shift. Biexciton Auger recombination of these particles is examined by transient absorption spectroscopy. A lengthening of the Auger recombination lifetime by a factor of ∼3.5 in the presence of the CdS-like clusters is observed and may contribute to the good PL properties of these nanostructures.

摘要

涂有含有类似 CdS 团簇的二氧化硅层的 CdTe 量子点表现出强烈的光致发光和光谱红移。通过瞬态吸收光谱研究了这些粒子的双激子俄歇复合。在存在类似 CdS 团簇的情况下，俄歇复合寿命延长了约 3.5 倍，这可能是这些纳米结构具有良好 PL 性能的原因。