Photoluminescence from mesoporous silica akin to that from nanoscale silicon: the nature of light-emitters

被引：41

作者：

Glinka, YD

Zyubin, AS

Mebel, AM

Lin, SH

Hwang, LP

Chen, YT

机构：

[1] Acad Sinica, Inst Atom & Mol Sci, Taipei 10764, Taiwan

[2] Natl Acad Sci Ukraine, Inst Surface Chem, UA-252650 Kiev, Ukraine

[3] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

[4] Russian Acad Sci, Inst Chem Phys, Chernogolovka 142432, Moscow Region, Russia

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 358卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(02)00400-1

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：

Photoluminescence (PL) from mesoporous silica is evidenced to originate from non-bridging oxygens (NBOs) located inside similar to1 nm pore walls and on the pore internal surfaces. Based on density functional calculations, we showed that the PL band diversity in the range of 1.0-2.1 eV results from both isolated bulk and surface NBOs and those combined with variously placed pore wall oxygen vacancies. The spectroscopic features are found to be similar to those of surface-oxidized silicon nanocrystals and porous silicon. The results obtained are expected to be useful to clarify the nature of light-emitters in silicon nanoscale materials. (C) 2002 Elsevier Science B.V. All rights reserved.

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页码：180 / 186

页数：7

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