One-Step Synthesis of High-Quality Gradient CdHgTe Nanocrystals: A Prerequisite to Prepare CdHgTe-Polymer Bulk Composites with Intense Near-Infrared Photoluminescence

被引：77

作者：

Sun, Haizhu ^{[1
,2
]}

Zhang, Hao ^{[1
]}

Ju, Jie ^{[1
]}

Zhang, Junhu ^{[1
]}

Qian, Gang ^{[3
]}

Wang, Chunlei ^{[1
]}

Yang, Bai ^{[1
]}

Wang, Zhi Yuan ^{[4
]}

机构：

[1] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

[2] NE Normal Univ, Coll Chem, Changchun 130024, Peoples R China

[3] Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[4] Carleton Univ, Dept Chem, Ottawa, ON K1S 5B6, Canada

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 21期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1021/cm8018296

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have demonstrated an efficient method to prepare high-quality CdHgTe alloyed nanocrystals (NCs) by making use of a large difference in the solubility between CdTe and HgTe in aqueous medium. The resultant NCs show a gradient quasi "core/shell" structure in which the "core" is rich in HgTe and the "shell" is rich in CdTe. This unique structure makes the photo I umi nescence (PL) quantum yield (QY) of CdHgTe NCs up to 45% and remarkably improves their stability. The excellent stability of CdHgTe NCs allows for the successful preparation of NC-polymer bulk composites with intense PL in the near-infrared spectral region (tunable from 1100 to 1400 nm) upon excitation at 550 nm. Not only is the difficulty of preparing the CdHgTe NC-polymer bulk composites overcome, but also the composites show excellent thermal and luminescent stabilities, which is of importance for their future applications.

引用

页码：6764 / 6769

页数：6

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