Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8161580 | Physica B: Condensed Matter | 2018 | 14 Pages |
Abstract
This study was focused on the effect of Zn2+ dopant concentration on the absorption edge and photoluminescence of anatase TiO2 nanowires synthesized by hydrothermal technique. For the undoped anatase TiO2 nanowires, the indirect band gap of 3.26Â eV and the direct band gap of 3.58Â eV are assigned to the indirect Î3âX1b and direct X2bâX1b transitions, respectively. The Zn2+-doping makes the absorption edge of TiO2:Zn2+ nanowires shift towards the lower energy side (red shift). On the other hand, the replacing Ti4+ ions with Zn2+ ions creates oxygen vacancies (VO) and shallow defects associated with VO. Just these defects are responsible for the enhanced luminescence of Zn2+-doped TiO2 nanowires.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Trinh Thi Loan, Vu Hoang Huong, Vu Thi Tham, Nguyen Ngoc Long,