High room-temperature photoluminescence of one-dimensional Ta2O5 nanorod arrays

被引：58

作者：

Devan, Rupesh S. ^{[1
]}

Ho, Wei-Der ^{[1
]}

Chen, Chia-Hao ^{[2
]}

Shiu, Hung-Wei ^{[2
]}

Ho, Ching-Hwa ^{[3
]}

Cheng, Chia-Liang ^{[1
]}

Wu, Sheng Yun ^{[1
]}

Liou, Yung ^{[4
]}

Ma, Yuan-Ron ^{[1
]}

机构：

[1] Natl Dong Hwa Univ, Dept Phys, Shoufeng 97401, Hualien, Taiwan

[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 300, Taiwan

[3] Natl Dong Hwa Univ, Dept Mat Sci & Engn, Hualien 97401, Taiwan

[4] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

来源：

NANOTECHNOLOGY | 2009年 / 20卷 / 44期

关键词：

STIMULATED CURRENT SPECTROSCOPY; RAY PHOTOELECTRON-SPECTROSCOPY; SILICON SOLAR-CELLS; TANTALUM PENTOXIDE; THIN-FILMS; RAMAN-SCATTERING; OXYGEN VACANCY; OPTICAL-PROPERTIES; REFRACTIVE-INDEX; DEFECT STATES;

D O I：

10.1088/0957-4484/20/44/445708

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study we analyzed the structural and electronic properties of a new morphological form, one-dimensional (1D) Ta2O5 nanorod arrays, which were synthesized by hot filament metal vapor deposition. Field-emission scanning electron microscopy (FESEM) showed the 1D Ta2O5 nanorods to be arranged in a large-area high-density array about 50 nm wide and approximately 550 nm long. X-ray photoemission spectroscopy (XPS) revealed not only the electronic structures and chemical properties of the 1D Ta2O5 nanorods but also their stoichiometric Ta and O compositions. Photoluminescence (PL) spectra showed intensive green-light, yellow-light and red-light emissions at room temperature. These emissions simultaneously emerged from the trap levels of oxygen vacancies within the Ta2O5 bandgap. The emission results strongly indicate that the 1D Ta2O5 nanorods are good room-temperature visible-light emitters.

引用

页数：5

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