Yellow upconversion luminescence in Ho~(3+)/Yb~(3+) co-doped Gd_2Mo_3O_9 phosphor

• 作 者: 孙家跃 薛兵 孙广超 崔殿鹏
• 机 构: School of Science, Beijing Technology and Business University,
• 出 处: Journal of Rare Earths
• 发表日期: 2013年08期
• 关键词: phosphor luminescence excitation yellow transitions doping photon emissions puri

The strong yellow upconversion (UC) light emission was observed in Ho3+/Yb3+ co-doped Gd2Mo3O9 phosphor under the excitation of 980 nm diode laser. The phosphors were synthesized by the traditional solid-state reaction method. The structures of the samples were characterized by X-ray diffraction (XRD). Under 980 nm excitation, Ho3+/Yb3+ co-doped Gd2Mo3O9 exhibited strong yellow UC emission based on the green emission near 541 nm generated by 5F4 , 5S2 → 5I8 transition and the strong red emission around 660 nm generated by 5F5 → 5I8 transition, which assigned to the intra-4f transitions of Ho3+ ions. The doping concentrations of Ho3+ and Yb3+ were determined to be 0.01 mol Ho3+ and 0.2 mol Yb3+ for the strongest yellow emission. Then the dependence of UC emission intensity on excitation power density showed that the green and red UC emissions were involved in two-photon process. The possible UC mechanisms for the strong yellow emission were also investigated. The result indicated that this material was a promising candidate for the application in the yellow display field.

The strong yellow upconversion (UC) light emission was observed in Ho3 + / Yb3 + co-doped Gd2Mo3O9 phosphor under the excitation of 980 nm diode laser. The phosphors were synthesized by the traditional solid-state reaction method. The structures of the samples were characterized by Under 980 nm excitation, Ho3 + / Yb3 + co-doped Gd2Mo3O9 has strong yellow emission based on the green emission near 541 nm generated by 5F4, 5S2 → 5I8 transition and the strong red emission around 660 nm generated The doping concentrations of Ho3 + and Yb3 + were determined to be 0.01 mol Ho3 + and 0.2 mol Yb3 + for the strongest yellow emission. Then the dependence of UC emission intensity on excitation power density showed that the green and red UC emissions were involved in two-photon process. The possible UC mechanisms for the strong yellow emission were also investigated. The result indicates th at this material was a promising candidate for the application in the yellow display field.