| REBO3中Ce3+和Bi3+对Sm3+光致发光的影响 |
| INFLUENCE OF Ce3+ AND Bi3+ ON Sra3+ PHOTOLUMINESCENCE IN REBO3 |
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| 摘要: 在紫外光(UV)激发下,系统地研究了REBO3(RE=La,Gd,Y)中Sm3+,Ce3+和Bi3+的发射光谱、激发光谱及其发光强度与组成、结构的关系.结果表明:Ce3+、Bi3+均可敏化LaBO3中Sm3+的发光;而在GdBO3和YBO3中,只有Bi3+能敏化Sm3+的发光,Ce3+猝灭Sm3+的发光.本文还探讨了三种基质中Sm3+发光浓度猝灭的机理. |
| 关键词: 光致发光 能量传递 浓度猝灭 REBO3 铈 铋 钐 |
| 基金项目: 国家自然科学基金 |
| Abstract: Under the excitation of UV light, the emission and excitation spectra of Sm3+, Ce3+ and Bi3+ in REBO3(RE = La, Gd, Y) are investigated. The relationships among emission intensity, composition and structure are also investigated. The results obtained indicate that Sm3+ emission is sensitized with Ce3+ and Bi3+ in LaBO3 but only with Bi3+ in GdBO3 and YBO3. Gd3+ acts an intermediate role in the energy transfer from Bi3+ to Sm3+ in GdBO3 host. According to the concentration quenching theory and concentration dependence on luminescent intensities of Sm3+ in LaBO3, GdBO3 and YBO3 under the excitation of 406nm, it has confirmed that the mechanisms of concentration self-quenching of Sm3+ are electric quadrupolc-quadrupolc, dipole-dipole and dipolc-quadrupolc interactions respectively. |
| Keywords: photoluminescence energy transfer concentration self-quenching REBO3 cerium bismuth samarium |
| 投稿时间：1991-09-12 |
| 摘要点击次数: 1327 |
| 全文下载次数: 1322 |
| 郭凤瑜,彭夷安.REBO3中Ce3+和Bi3+对Sm3+光致发光的影响[J].无机化学学报,1993,9(1):83-87. |
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