Phase-Modified Up-Conversion Luminescence in Er-Doped Single-Crystal PbTiO3 Nanofibers

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• 作者：Siyu Gong ; Zhaohui Ren ; Shan Jiang ; Ming Li ; Xiang Li ; Xiao Wei ; Gang Xu ; Ge Shen ; Gaorong Han
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：March 13, 2014
• 年：2014
• 卷：118
• 期：10
• 页码：5486-5493
• 全文大小：598K
• 年卷期：v.118,no.10(March 13, 2014)
• ISSN：1932-7455

文摘

The Er-doped preperovskite and perovskite single-crystal PbTiO₃ (PTO) nanofibers with a series of doping concentration (0鈥? mol %) were successfully synthesized by hydrothermal method and solid state phase transformation method, respectively. The XRD, XPS, and Raman results indicated that Er³⁺ occupied Pb²⁺ site in preperovskite PTO and Ti⁴⁺ site in perovskite PTO nanofibers. The photoluminescence (PL) measurements indicated that only the strong green emission corresponding to the preperovskite PTO host matrix was observed, whereas up-conversion (UC) emission under infrared excitation (980 nm) was absent. In contrast, the strong green emission (at 524 and 554 nm) and the weak red emission around 670 nm of Er³⁺ occurred in the PL and UC PL processes of Er-doped perovskite PTO nanofibers. The distinguished difference in these two kinds of nanofibers might be attributed to the substitution sites and chemical environments of Er³⁺. It is suggested that such Er-doped single-crystal perovskite PTO nanofibers could be interesting objects for applications in mechanical鈥揺lectrical luminescence such as electric field modulation luminescence and mechanoluminescence.