| Li2O-Ln2O3-SiO2:Eu3+,Bi3+体系的结构 |
| RELATIONSHIP BETWEEN THE STRUCTURE AND LUMINESCENCE PROPERTIES OF THE SYSTEM Li2O-Ln2O3-SiO2: Eu3+, Bi3+ (Ln=Y, Gd, La) |
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| 摘要: 采用sol-gel法合成了系列发光体Li2O-Ln2O3-SiO2:Eu3+,Bi3+,并确定了发光体的物相结构。当Ln3+=Y3+和Ln3+=La3+时,紫外光激发下Eu3+的发射分别以红光和橙光为主,只存在一种Eu3+发光中心；Ln |
| 关键词: sol-gel法 铕 铋 发光性能 能量传递 |
| 基金项目: 希土化学与物理开放实验室资助 |
| Abstract: The series silicate luminophors Li2O-Ln2O3-SiO2: Eu3+,Bi3+ were synthesized by sol-gel method, and their phase and structure were determined by XRD. Under the excitation of UV light, Eu3+ ions show red emission and orange emission in the case of Ln3+=Y3+ and Ln3+= La3+, respectively, in which two hosts exist only one Eu3+luminescent center. Nevertheless when Ln3+= Gd3+, at least two kinds of Eu3+and Bi3+ ions luminescent centers were observed. Bi3+has lower excitation and emission energies due to the stronger covalency for Ln3+=Gd3+, in which host an efficient energy transfer from Bi3+ at4f sites to Eu3+ has been found. |
| Keywords: sol-gel method europium bismuth luminescenca property energy transfer |
| 投稿时间：1993-05-25 |
| 摘要点击次数: 1410 |
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| 林君,李彬,龙斌,孙书菊.Li2O-Ln2O3-SiO2:Eu3+,Bi3+体系的结构[J].无机化学学报,1994,10(2):205-209. |
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