Switching-On Quantum Size Effects in Silicon Nanocrystals

被引：44

作者：

Sun, Wei ^{[1
]}

Qian, Chenxi ^{[1
]}

Wang, Liwei ^{[1
,2
]}

Wei, Muan ^{[3
]}

Mastronardi, Melanie L. ^{[1
]}

Casillas, Gilberto ^{[4
]}

Breu, Josef ^{[5
]}

Ozin, Geoffrey A. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada

[2] Nankai Univ, Tianjin Key Lab Met & Mol Based Mat Chem, Dept Chem, Tianjin 300071, Peoples R China

[3] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada

[4] Univ Wollongong, Ctr Electron Microscopy, Wollongong, NSW 2500, Australia

[5] Univ Bayreuth, Lehrstuhl Anorgan Chem 1, D-95440 Bayreuth, Germany

来源：

ADVANCED MATERIALS | 2015年 / 27卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

quantum size effects; size-dependent photoluminescent absolute quantum yield; silicon monoxide precursors; silicon nanocrystals; size separation; PLASMA SYNTHESIS; PHOTOLUMINESCENCE; EFFICIENCY; DOTS;

D O I：

10.1002/adma.201403552

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

(Graph Presented) The size-dependence of the absolute luminescence quantum yield of size-separated silicon nanocrystals reveals a "volcano" behavior, which switches on around 5 nm, peaks at near 3.7-3.9 nm, and decreases thereafter. These three regions respectively define: i) the transition from bulk to strongly quantum confined emissive silicon, ii) increasing confinement enhancing radiative recombination, and iii) increasing contributions favoring non-radiative recombination. © 2014 Wiley-VCH Verlag GmbH & Co. KGaA.

引用

页码：746 / 749

页数：4

共 22 条

[1] Quantum confinement in Si and Ge nanostructures [J].