High Power Laser and Particle Beams, Volume. 35, Issue 12, 121005(2023)
Upconversion luminescence properties of Yb3+/Ho3+/Tm3+ tri-doped LiTaO3 polycrystals
The Yb3+/Ho3+/Tm3+-doped LiTaO3 polycrystalline materials at various doping mole fractions were prepared using a high-temperature solid-state synthesis method. The X-ray diffraction (XRD) patterns, ultraviolet-visible absorption (UV-Vis) spectra, and upconversion fluorescence emission spectra of Yb3+/Ho3+ -doped, Yb3+/Tm3+-doped, and Yb3+/Ho3+/Tm3+-doped LiTaO3 samples were tested. The XRD results indicate that the doped rare earth ions have not altered the crystal structure of LiTaO3, suggesting that the rare earth ions entered the lattice by replacing the host ions. The UV absorption edge of the samples shows a redshift followed by a blueshift with increasing mole fractions of Ho3+ or Tm3+. Under excitation from a 980 nm pump source, upconversion blue light (475 nm), green light (545 nm), and red light (663 nm and 650 nm) were observed in the visible region. The upconversion fluorescence chromaticity can be tailored by varying the mole fractions of Ho3+/Tm3+ in LiTaO3. Among the samples, the mole fractions 2.0%Yb3+/0.05%Ho3+/0.4%Tm3+ doped LiTaO3 polycrystalline specimen exhibits the excellent upconversion output near the standard white light.
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Tao Zhang, Zhenhui Li, Caixia Cui, Danyi Zhang, Yudong Cai, Yifan Xin. Upconversion luminescence properties of Yb3+/Ho3+/Tm3+ tri-doped LiTaO3 polycrystals[J]. High Power Laser and Particle Beams, 2023, 35(12): 121005
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Received: Jun. 30, 2023
Accepted: Oct. 17, 2023
Published Online: Dec. 27, 2023
The Author Email: Cui Caixia (49470046@qq.com), Zhang Danyi (63407583@qq.com)