Photon energy up-conversion in colloidal TiO2 nanorods

被引：17

作者：

Abazovic, Nadica D. ^{[1
]}

Ruvarac-Bugarcic, Ivanka A. ^{[1
]}

Comor, Mirjana I. ^{[1
]}

Bibic, Natasa ^{[1
]}

Ahrenkiel, S. Phillip ^{[2
]}

Nedeljkovic, Jovan M. ^{[1
]}

机构：

[1] Vinca Inst Nucl Sci, Belgrade 11001, Serbia

[2] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

OPTICAL MATERIALS | 2008年 / 30卷 / 07期

关键词：

TiO2; nanoparticles; anatase; nanorods; photoluminescence; up-conversion;

D O I：

10.1016/j.optmat.2007.05.038

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nonaqueous reaction between titanium(IV) chloride and benzyl alcohol was used for the synthesis of highly crystalline TiO2 nanorods. The X-ray diffraction measurements proved the exclusive presence of the anatase phase. The photoluminescence of anatase TiO2 nanorods with several well-resolved emission bands was observed, and quantum yield at room temperature was found to be 2.5 x 10(-3). Photon energy up-conversion from colloidal TiO2 nanorods was observed at low excitation intensities. The energy of the up-converted photoluminescence spans the range of energies displayed by the normal photoluminescence emission of the TiO2 nanorods. The explanation for the photon energy up-conversion involves mid-gap energy levels. (c) 2007 Elsevier B.V. All rights reserved.

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收藏

页码：1139 / 1144

页数：6

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