Choi Seul-Ki, Park Sangmoon
Center for Green Fusion Technology and Department of Engineering in Energy & Applied Chemistry, Silla University, Busan, 617-736, Republic of Korea.
Luminescence. 2016 Mar;31(2):487-490. doi: 10.1002/bio.2986. Epub 2015 Aug 19.
Optical materials composed of Ba((9-3)(m+n)/2)Er(m)Yb(n)Y2Si6O24 (m = 0.005-0.2, n = 0-0.3) were prepared using a solid-state reaction. The X-ray diffraction patterns of the obtained phosphors were examined to index the peak positions. The photoluminescence (PL) excitation and emission spectra of the Er(3+)-activated phosphors and the critical emission quenching as a function of Er(3+) content in the Ba(9-3m/2)Er(m)Y2Si6O24 structure were monitored. The spectral conversion properties of Er(3+) and Er(3+)-Yb(3+) ions doped in Ba9Y2Si6O24 phosphors were elucidated under diode-laser irradiation at 980 nm. Up-conversion emission spectra and the dependence of the emission intensity on pump power for the Ba8.55Er0.1Yb0.2Y2Si6O24 phosphor were investigated. The desired up-conversion of the emitted light, which passed through the green, yellow, orange and red regions of the spectrum, was achieved through the use of appropriate Er(3+) and/or Yb(3+) concentrations in the host structure and 980 nm excitation light. The up-conversion mechanism in the phosphors is described by an energy-level schematic.
采用固态反应法制备了由Ba((9 - 3)(m + n)/2)Er(m)Yb(n)Y2Si6O24（m = 0.005 - 0.2，n = 0 - 0.3）组成的光学材料。对所得磷光体的X射线衍射图谱进行了检测，以确定峰位。监测了Er(3+)激活的磷光体的光致发光（PL）激发和发射光谱以及Ba(9 - 3m/2)Er(m)Y2Si6O24结构中作为Er(3+)含量函数的临界发射猝灭。在980 nm的二极管激光照射下，阐明了掺杂在Ba9Y2Si6O24磷光体中的Er(3+)和Er(3+) - Yb(3+)离子的光谱转换特性。研究了Ba8.55Er0.1Yb0.2Y2Si6O24磷光体的上转换发射光谱以及发射强度对泵浦功率的依赖性。通过在主体结构中使用适当的Er(3+)和/或Yb(3+)浓度以及980 nm激发光，实现了发射光所需的上转换，该发射光穿过光谱的绿色、黄色、橙色和红色区域。用能级示意图描述了磷光体中的上转换机制。
