A single-phase white-emitting La-10(SiO4)(6)O-3 : Eu2+/Eu3+ phosphor for near-UV LED-based application

作者：Lu, Xue; Liu, Haitao^*; Yang, Xinyu; Tian, Yiguang; Gao, Xiaoli; Han, Liyuan; Xu, Qin

来源：Ceramics International, 2017, 43(15): 11686-11691.

DOI：10.1016/j.ceramint.2017.05.358

• High-temperature solid-state
• Phosphors
• Oxyapatite
• White-emitting

A novel single-phase white-emitting phosphor La-10(SiO4)(6)O-3 (LSO): xEu has been synthesized by high-temperature solid-state reaction. Its crystal structure, luminescence properties, fluorescence decay time and oxygen vacancies have been characterized by X-ray diffraction (XRD) and photoluminescence (PL) spectra. XRD result shows a typical oxyapatite structure with the space group of P6(3)/m. Characteristic excitation and emission peaks of Eu2+ and Eu3+ were observed from PL studies. The optimum doping concentration of Eu was found to be 7.5 mol% (x = 0.075). In this work, the lifetimes of Eu3+ and Eu2+ were considerably longer than those from some references. Under the excitation of different near ultraviolet (n-UV) longer wavelengths (lambda ex = 360, 370, and 380 nm), the white light emission can be realized with the CIE chromaticity coordinates (0.3907, 0.3595), (0.3472, 0.3282), and (0.3504, 0.3062) for the phosphor LSO: 0.075Eu. The chromaticity coordinates of the phosphor were all located in the white region. Therefore, it is suggested that the explored LSO: 0.075Eu phosphor can be a good candidate for white light-emitting diodes (W-LEDs) application.

• 出版日期2017-10-15
• 单位温州大学