Yiyao Ge
Tsinghua University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Yiyao Ge.
RSC Advances | 2016
Yiyao Ge; Yongjie Zhao; Xuanyi Yuan; Siyuan Sun; Yuzhen Zhao; Heping Zhou
The Er-doped perovskite single-crystal NaNbO3 nanorods with a series of doping content (0–1 wt%) were successfully synthesized by hydrothermal method. The XRD and Raman analyses indicated that the Er3+ ion firstly entered into the B site (Nb5+) in the ABO3 perovskite structure and then the A site (Na+) with a further increase of Er-doping content. High-resolution transmission electron microscopy (HRTEM) was employed to demonstrate the single-crystal features of NaNbO3 nanorods. The as-synthesized Er-doped NaNbO3 nanorods exhibited excellent up-conversion (UC) photoluminescence (PL) behavior. The strong green emission and the weak red emission of Er3+ were observed in the UC PL spectra. The maximum emission intensity of the UC PL spectrum was achieved in NaNbO3 nanorods with 0.5 wt% of Er3+ doped. Furthermore, the UC PL spectra obtained under different laser input powers confirmed that two photons contributed to the observed up-conversion luminescence properties. Owing to these luminescent merits, the as-synthesized Er-doped single-crystal perovskite NaNbO3 nanorods exhibit potential application in novel multifunctional devices.
RSC Advances | 2016
Siyuan Sun; Yiyao Ge; Yongjie Zhao; Xuanyi Yuan; Yuzhen Zhao; Heping Zhou
Perovskite oxides have attracted much attention owing to their excellent physical properties, such as piezoelectricity, ferroelectricity, and ferromagnetism. Moreover, these properties can be strongly affected and regulated by the doping strategy. In this work, Er3+ doped single crystal KNbO3 nanosheets were successfully synthesized via a solvothermal method. XRD analysis indicated that Er3+ firstly substituted into the B site (Nb5+) and then A site (K+) in the ABO3 perovskite structure with the further increasing content of Er3+. The orthorhombic structure of the pure KNbO3 and Er3+ doped KNbO3 was proved in terms of the Raman spectra. The SEM observation demonstrated that the size of the as-obtained nanosheets was about 70 nm in thickness and 3 μm in diameter. The single crystal structure state of the as-obtained products was confirmed by HRTEM. Furthermore, the growth mechanism of Er3+ doped KNbO3 nanosheets was rationally elaborated and proposed. The as-obtained Er3+ doped KNbO3 nanosheets exhibited excellent up-conversion (UC) photoluminescence (PL) properties with a strong green emission and a weak red emission. The maximum emission intensity of the UC PL spectrum was achieved with 0.4 mol% of Er3+ doped. To conclude, the as-synthesized Er3+ doped KNbO3 nanosheets could be a potential candidate for the development of multifunctional devices, by introducing PL properties to piezoelectric KNbO3 materials.
Journal of the American Ceramic Society | 2015
Qi Wang; Wei Cui; Yiyao Ge; Kexin Chen; Zhipeng Xie
Journal of Power Sources | 2016
Yongjie Zhao; Dong Yan; Caihua Ding; Dezhi Su; Yiyao Ge; Yuzhen Zhao; Heping Zhou; Jingbo Li; Haibo Jin
Journal of Alloys and Compounds | 2016
Yiyao Ge; Ying Chen; Qi Wang; Wei Cui; Yifeng Zou; Zhipeng Xie; Xuanyi Yuan; Kexin Chen
Journal of the American Ceramic Society | 2015
Yiyao Ge; Wei Cui; Qi Wang; Yifeng Zou; Zhipeng Xie; Kexin Chen
Journal of Alloys and Compounds | 2016
Yongjie Zhao; Yiyao Ge; Xiaowen Zhang; Yuzhen Zhao; Heping Zhou; Jingbo Li; Haibo Jin
Ceramics International | 2015
Qi Wang; Wei Cui; Yiyao Ge; Kexin Chen; Zhipeng Xie
Journal of Alloys and Compounds | 2016
Qi Wang; Yiyao Ge; Wei Cui; Kexin Chen; J.M.F. Ferreira; Zhipeng Xie
Journal of the American Ceramic Society | 2015
Yiyao Ge; Qi Wang; Wei Cui; Yifeng Zou; Zhipeng Xie; Kexin Chen