Abstract
The lanthanide-based white light-emitting diodes excited by irradiation at a wavelength of 980 nm have attracted increasing attention because of their low photon frequency and ease of implementation. Here, we report on warm, white, Y2Ti2O7:Tm/Yb/Er nanotubes prepared by a simple single-needle electrospinning method. The Y2Ti2O7:Tm/Yb/Er nanotubes have an outer diameter of about 180 nm, and a wall thickness of 36 nm. Their color coordinates and chromaticity were controlled to yellow → red → warm white by adjusting the Tm3+ concentration from 0.5 to 2.0%. The luminescence properties and upconversion mechanism of Y2Ti2O7:Tm/Yb/Er nanotubes were investigated. The warm white Y2Ti2O7:Tm/Yb/Er nanotubes exhibit a strong correlated color temperature to a household incandescent lamp.
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Data supporting the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This work was financially supported by the Joint Research Fund Liaoning–Shenyang National Laboratory for Materials Science (No. 20180510045), the National Natural Science Foundation of China (Nos. 52071048, 11704056, and 11774042), and the Fundamental Research Funds for the Central Universities (No. 3132019338).
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Han, Z., Yu, H., Tian, Z. et al. Electrospinning preparation and white upconversion luminescence of Y2Ti2O7:Tm/Yb/Er nanotubes. Appl. Phys. A 128, 755 (2022). https://doi.org/10.1007/s00339-022-05904-3
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DOI: https://doi.org/10.1007/s00339-022-05904-3