Thiol-stabilized PbS quantum dots with stable luminescence in the infrared spectral range

被引：9

作者：

Nakashima, Seisuke ^{[1
,2
]}

Hoshino, Ai ^{[1
]}

Cai, Junjiang ^{[1
]}

Mukai, Kohki ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Solid State Mat & Engn, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

[2] RIKEN, Adv Res Inst, Wako, Saitama 3510198, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2013年 / 378卷

基金：

日本学术振兴会;

关键词：

Nanostructures; Quantum dots; Nanomaterials; Sulfides; Semiconducting lead compounds; Infrared devices; 1000-1600 NM ELECTROLUMINESCENCE; OPTICAL-PROPERTIES; NANOCRYSTALS; GROWTH;

D O I：

10.1016/j.jcrysgro.2012.11.024

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Using thiol-stabilizing aqueous solution method, we have synthesized PbS quantum dots (QDs) that emit stable and spectrally tunable photoluminescence in the optical telecommunication band at around 1300 nm. The emission wavelength of the QDs was varied from 1295 to 1330 nm by increasing the synthesis time or Pb2+/TGA molar ratio. PbS nanocrystals (NCs) were directly imaged using high-resolution transmission electron microscopy, which gave an evaluation of the averaged sizes and the symmetry indexes of NCs. The symmetry index of NCs synthesized for 96 h was improved to 0.92 from 0.85, compared with that synthesized for 24 h. It has been found that chemically synthesized water-soluble PbS QDs are a potential source of entangled photon pairs in the near future. (c) 2013 Elsevier B.V. All rights reserved.

引用

收藏

页码：542 / 545

页数：4

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