摘要
采用高温固相反应法制备了 Ba Y2 F8∶ Ce3 + ,Ba Y2 F8∶ Eu2 + 和 Ba Y2 F8∶ Ce,Eu,测定了它们的激发、发射和漫反射光谱 .首次发现并研究了在 Ba Y2 F8共掺 Ce F3 和 Eu F3 体系中存在 Ce3 + → Eu2 + 的能量传递和Ce3 +→ Eu3 +的电子转移两种过程及其竞争 .根据光谱数据 ,讨论了 Ce4
Phorsphors of BaY 2F 8∶Ce 3+ , BaY 2F 8: Eu 2+ and BaY 2F 8∶Ce, Eu were prepared by higher temperature solid reaction and their excitation, emission and diffuse reflection spectra were made. We firstly found that the competition of energy transfer from Ce 3+ to Eu 2+ and electron transfer from Ce 3+ to Eu 3+ existed in CeF 3 and EuF 3 co doped BaY 2F 8 systems. The f f transition emission of Eu 2+ was increased with increasing x in systems BaY 2F 8∶0.03Ce, x Eu. Ce 4+ ions coexist with Ce 3+ ions and substitute Y 3+ for Ce 4+ in the systems BaY 2F 8∶Eu, Ce.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第3期358-361,共4页
Chemical Journal of Chinese Universities
基金
国家重点基础研究发展规划项目! (批准号 :G19980 613 2 3 )资助
