Abstract
The upconversion luminescence (UCL) of nanocrystalline gadolinium oxide (Gd2O3) doped with Er3+ and Yb3+ ions has been studied in the temperature range of 90–400 K. The nanocrystals were synthesized by chemical vapor deposition and possessed a cubic crystalline structure with an average particle size within 48–57 nm. It is established that the USL intensity in the red (4F9/2 → 4I15/2 transition in Er3+ ion) and green (4S3/2 → 4I15/2 transition) spectral regions depends on the sample temperature and concentration of dopant ions, as well as on the additional structural defects (anion vacancies) created in the crystal lattice by the introduction of Zn2+ ions or irradiation with high-energy (10 MeV) electrons. The luminescence efficiency and spectrum of the upconversion phosphor are determined by energy transfer processes.
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Original Russian Text © V.A. Pustovarov, E.S. Trofimova, Yu.A. Kuznetsova, A.F. Zatsepin, 2018, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2018, Vol. 44, No. 14, pp. 42–49.
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Pustovarov, V.A., Trofimova, E.S., Kuznetsova, Y.A. et al. Upconversion Luminescence of Gd2O3 Nanocrystals Doped with Er3+ and Yb3+ Ions. Tech. Phys. Lett. 44, 622–625 (2018). https://doi.org/10.1134/S106378501807026X
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DOI: https://doi.org/10.1134/S106378501807026X