Electronic and luminescence properties of sputter-deposited TiO2 nanostructures
Electronic and luminescence properties of sputter-deposited TiO2 nanostructures
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DOI：
10.1016/j.actamat.2013.08.066
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发表时间：
2013-11
期刊：
影响因子：
9.4
通讯作者：
Yu Chang;D. K. Mishra;J. Ting
中科院分区：
文献类型：
--
作者：
Yu Chang;D. K. Mishra;J. Ting
本文以锡为催化剂，采用射频磁控溅射沉积技术合成了二氧化钛纳米结构。催化剂播种和溅射沉积是在室温下进行的。tio2的生长是在Ar + o2和Ar + n2混合气氛中进行的，并且发现包含纯锐钛矿。用扫描电镜对制备的tio2纳米结构进行了形貌表征。利用x射线吸收近边结构光谱研究了其电子结构。用x射线光电子能谱分析了化学成分，表明Ti3+的存在。用阴极发光光谱法研究了其发光特性。从发光数据中分辨出5个峰，分别表示TiO6上的氧空位、F、F+、带间发射和自捕获激子的发射。
TiO2nanostructures are synthesized here by a radiofrequency magnetron sputter deposition technique using tin as a catalyst. The catalyst seeding and the sputter deposition are performed at ambient temperature. The growth of TiO2is carried out in a mixed Ar + O2and Ar + N2atmosphere and is found to comprise pure anatase. The morphologies of the obtained TiO2nanostructures are characterized using scanning electron microscopy. The electronic structures are investigated by X-ray absorption near-edge structure spectroscopy. The chemical compositions are analyzed using X-ray photoelectron spectra analysis, which indicates the presence of Ti3+. The luminescence properties are examined using cathodoluminescence spectroscopy. Five peaks are resolved from the luminescence data, indicating emissions of oxygen vacancies, F, F+, band-to-band emission and self-trapped excitons on TiO6.