Photo from archive.org
Tm3+/Yb3+co-doped Pb(Zn1/3Nb2/3)O3–9PbTiO3 (PZN–9PT) single crystals were grown by high-temperature flux technique. The effects of Tm3+/Yb3+ ions doping on phase structure, dielectric, ferroelectric and UC luminescence properties were investigated. The XRD,… Click to show full abstract
Tm3+/Yb3+co-doped Pb(Zn1/3Nb2/3)O3–9PbTiO3 (PZN–9PT) single crystals were grown by high-temperature flux technique. The effects of Tm3+/Yb3+ ions doping on phase structure, dielectric, ferroelectric and UC luminescence properties were investigated. The XRD, Raman spectrum and TEM results reveal that the Tm3+/Yb3+ ions can diffuse into the lattice of the PZN–9PT and increase the lattice constants. The Curie temperature Tc increases from 170 °C for pure PZN–9PT to 182.5 °C for PZN–9PT: Tm3+/Yb3+. Meanwhile, the coercive field Ec of Tm3+/Yb3+ co-doped PZN–9PT reaches to 12.1 kV/cm which is nearly four times higher than that of PZN–9PT crystal. Under a 980 nm laser excitation, crystals modified by the Tm3+/Yb3+ produce UC with three colors: blue (480 nm, 1G4 → 3H6), strong near-infrared (NIR, 804 nm, 3H4 → 3H6) and weak red (652 nm, 1G4 → 3F4). Our results can provide a new way for the design of multifunctional materials used in optical-electrical devices.