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Electrospinning preparation and upconversion luminescence of Y2Ti2O7:Tm/Yb nanofibers

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Abstract

Nanoscale Y2Ti2O7:Tm3+/Yb3+ fibers were fabricated through electrospinning followed by calcining at high temperatures. The resulting Y2Ti2O7:Tm3+/Yb3+ fibers were characterized by XRD, SEM, TEM, EDX, and ICP-OES. The average diameter of the Y2Ti2O7:Yb/Tm nanofibers is about  80 nm and they are hundreds of microns long. Their upconversion (UC) intensity was found to increase with increasing Yb3+ concentration within the working current range of 1.50–2.50 A under 980-nm laser irradiation. The mechanism of energy transfer between Yb3+ to Tm3+ ions in the Y2Ti2O7:Yb/Tm nanofibers was also elucidated The three-photon processes and the two-photon processes were confirmed to be involved in blue emissions and red and near-infrared emission by analyzing the UC-intensity dependence on the operating current of the 980-nm exciting laser.

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Acknowledgements

The authors would like to acknowledge valuable supports from the National Natural Science Foundation of China (Grant nos. 11774042 and 11704056), the Joint Research Fund of Liaoning-Shenyang National Laboratory for Materials Science (Grant no. 20180510045), the Fundamental Research Funds for the Central Universities (Grant no. 3132019338), the China Postdoctoral Science Foundation (Grant no. 2016M591420), and the Open Fund of the State Key Laboratory of Integrated Optoelectronics (Grant nos. IOSKL2019KF06 and IOSKL2018KF02).

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  1. Department of Physics, Dalian Maritime University, No. 1, Linghai Road, Dalian, 116026, Liaoning, People’s Republic of China

    Hongquan Yu, Baojiu Chen, Jiashi Sun, Lihong Cheng, Xiangping Li, Jinsu Zhang & Sai Xu

  2. College of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian, 116028, Liaoning, People’s Republic of China

    Piaopiao Jiang

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Yu, H., Jiang, P., Chen, B. et al. Electrospinning preparation and upconversion luminescence of Y2Ti2O7:Tm/Yb nanofibers. Appl. Phys. A 126, 690 (2020). https://doi.org/10.1007/s00339-020-03889-5

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