Energy-level and optical properties of nitrogen doped TiO2: An experimental and theoretical study

被引：16

作者：

Gonzalez-Borrero, P. P. ^{[1
,2
]}

Bernabe, H. S. ^{[2
]}

Astrath, N. G. C. ^{[2
]}

Bento, A. C. ^{[2
]}

Baesso, M. L. ^{[2
]}

Castro Meira, M. V. ^{[3
,4
]}

de Almeida, J. S. ^{[3
]}

da Silva, A. Ferreira ^{[3
]}

机构：

[1] Univ Estadual Centro Oeste, Dept Fis, BR-85040080 Guarapuava, PR, Brazil

[2] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, PR, Brazil

[3] Univ Fed Bahia, Inst Fis, BR-40210340 Salvador, BA, Brazil

[4] CETEC Univ Fed Reconcavo Bahia, BR-44380000 Cruz Das Almas, BA, Brazil

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 22期

关键词：

RUTILE;

D O I：

10.1063/1.3664104

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photoacoustic spectroscopy was used to study nitrogen-doped titanium dioxide film. The energy positions of defect and impurity centre levels are reported. The energy levels were obtained using the excitation method and the mechanisms of the photoacoustic signal generation are discussed. The visible light absorption of the yellow film was explained considering electronic transitions between localized states within the band gap and the transitions from these states into the conduction band. Moreover, first principles calculations revealed that nitrogen doping and oxygen vacancies in titanium dioxide induce defect levels within the gap which account for the absorption in the visible light. (C) 2011 American Institute of Physics. [doi:10.1063/1.3664104]

引用

页数：3

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