High-temperature High-pressure Hydrothermal Synthesis of Dy3＋-doped YNbO4 Single Crystal and Its Luminescence Properties

Single crystal Dy3＋ doped YNbO4phosphors were prepared via a high-temperature high-pressure hydrothermal procedure. Under excitation at 270 nm, the Dy3＋-doped YNbO4 phosphor shows bright white emission, which is composed of two strong bands at 492 and 576 nm corresponding to the characteristic 4F9/2→6H15/2 and aF9/2→6H13/2 transitions of Dy3＋, respectively. The dominant band was observed at 352 nm, which corresponds to the 6H15/2→6p7/2 transition of Dy3＋. Nearly white light was achieved at 2ex 270, 310 and 388 nm and the CIE（International Commission on Illumination） values were （0.3135, 0.3421）, （0.3088, 0.3380） and （0.3146, 0.3296）, respectively.

High-temperature High-pressure Hydrothermal Synthesis of Dy3+-doped YNbO4 Single Crystal and Its Luminescence Properties

Single crystal Dy³⁺ doped YNbO₄ phosphors were prepared via a high-temperature high-pressure hydrothermal procedure. Under excitation at 270 nm, the Dy³⁺-doped YNbO₄ phosphor shows bright white emission, which is composed of two strong bands at 492 and 576 nm corresponding to the characteristic ⁴F_9/2→⁶H_15/2 and ⁴F_9/2→⁶H_13/2 transitions of Dy³⁺, respectively. The dominant band was observed at 352 nm, which corresponds to the ⁶H_15/2→⁶P_7/2 transition of Dy³⁺. Nearly white light was achieved at λ_ex 270, 310 and 388 nm and the CIE(International Commission on Illumination) values were (0.3135, 0.3421), (0.3088, 0.3380) and (0.3146, 0.3296), respectively.