Gas sensitive light emission properties of tin oxide and zinc oxide nanobelts

被引：32

作者：

Lettieri, S.

Bismuto, A.

Maddalena, P.

Baratto, C.

Comini, E.

Faglia, G.

Sberveglieri, G.

Zanotti, L.

机构：

[1] Univ Naples Federico II, CNR, INFM Coherentia, I-80126 Naples, Italy

[2] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy

[3] Univ Brescia, CNR, INFM, Brescia, Italy

[4] Univ Brescia, Dipartimento Fis, Brescia, Italy

[5] CNR, MEM, I-43100 Parma, Italy

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2006年 / 352卷 / 9-20期

关键词：

sensors; quantum wells; wires and dots; luminescence; time-resolved measurements; tin oxide adsorption;

D O I：

10.1016/j.jnoncrysol.2006.02.037

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Light emission properties of tin oxide and zinc oxide nanobelts and nanowires have been investigated by means of continuous wave and time resolved photoluminescence. In both kind of nanostructures, photoluminescence quenching was observed at increasing temperature and at interaction with 5 ppm concentration NO2. Photoluminescence time decay measurements in the visible range suggest that adsorbed NO2 induces fast non-radiative relaxation of surface electrons, competing with radiative surface-localized recombination. Such fast interaction between electrons and molecular adlayer may reduce the number of possible radiative recombination events at surface without significantly changing the subsequent slower radiative processes. Our measurements also show that adsorbate-related non-radiative recombination time should be lower than 1 ns. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1457 / 1460

页数：4

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