Fabrication and Photoluminescence Property of SnO2 Microtowers with Interstitial Tin Ions

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• 作者：Ming Fang ; Lide Zhang ; Xiaoli Tan ; Xiaoye Hu ; Weiwei Yan ; Peisheng Liu
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：June 4, 2009
• 年：2009
• 卷：113
• 期：22
• 页码：9676-9680
• 全文大小：183K
• 年卷期：v.113,no.22(June 4, 2009)
• ISSN：1932-7455

文摘

The tower-like tin oxide microarchitecture with interstitial tin atom (Sn_i) was fabricated utilizing a hydrothermal method, which is started with metal powders and was expected to be a general path toward high formation energy defects in nano/micro architectures. The low and high valence metal ionic compounds were found forming together in the weak oxidizing solution, and then SnO_x (1 ≤ x < 2) and SnO₂ codeposited to form a towerlike microarchitechture. The Raman investigation indicates the amorphous SnO_x phase is embedded in SnO₂. While annealing in the atmosphere, some of the low valence metal ion (Sn²⁺) moved into the lattice vacant oxygen octahedra to form the Sn_i defect. Further photoluminescence investigation indicates the process of energy transferring from Sn⁴⁺ to the neighbor Sn_i in the microtower and then giving the narrow emissions due to the electron transitions from p and sp orbits to s orbit in Sn_i.