| M5(PO4)3F (M=Ca, Sr, Ba)中Sm3+的电荷迁移态及Sm3+和Eu3+的电荷迁移能量关系 |
| Charge Transfer States of Sm3+ and Charge Transfer Energy Relationship between Sm3+ and Eu3+ in M5(PO4)3F (M=Ca, Sr, Ba) |
| 作者 | 单位 | E-mail | | 曾取 | 中山大学化学与化学工程学院, 广州, 510275
阳江职业技术学院, 阳江, 529566 | | | 梁宏斌 | 中山大学化学与化学工程学院, 广州, 510275 | | | 田梓峰 | 中山大学化学与化学工程学院, 广州, 510275 | | | 林惠红 | 中山大学化学与化学工程学院, 广州, 510275 | | | 苏锵 | 中山大学化学与化学工程学院, 广州, 510275 | cesbin@mail.sysu.edu.cn |
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| 摘要: 采用高温固相反应合成了M5-2xSmxNax(PO4)3F(M=Ca,Sr,Ba)荧光体,研究了其在真空紫外-可见光范围的发光特性。发现在Ca5(PO4)3F中Sm3+的电荷迁移带约在191nm,在Sr5(PO4)3F中约在199nm,而在Ba5(PO4)3F中约在204nm,随着被取代碱土离子半径的增大电荷迁移能量逐渐减小。比较了M5(PO4)3F(M=Ca,Sr,Ba)中Sm3+和Eu3+电荷迁移能量的关系。 |
| 关键词: Ca5(PO4)3F Sr5(PO4)3F Ba5(PO4)3F Sm3+ 电荷迁移态 |
| 基金项目: 国家自然科学基金(No.20571088);广东省科技计划项目(No.2005A10609001)资助项目 |
| Abstract: The phosphors with general molecular formula M5-2xSmxNax (PO4)3F (M=Ca, Sr, Ba) were prepared by a high-temperature solid state reaction technique. The spectroscopic properties in VUV-Vis (vacuum ultraviolet-Visible) range were investigated. The maxima of CTBs (charge transfer hands) were found to be at about 191 nm for M=Ca, 199 nm for M=Sr, and 204 nm for M=Ba, showing the CT energy decreasing with the increase of the site size. The CT energy difference of Sm3+ and Eu3+ in a specific host lattice M5(PO4)3F (M=Ca, Sr, Ba) was compared. The relationships on the substituted ionic radii and the CT energy of Sm3+ and Eu3+ in M5(PO4)3F (M=Ca, Sr, Ba) are proposed. |
| Keywords: Ca5(PO4)3F Sr5(PO4)3F Ba5(PO4)3F Sm3+ CT states |
| 投稿时间：2007-11-09 修订日期：2007-12-26 |
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| 曾取,梁宏斌,田梓峰,林惠红,苏锵.M5(PO4)3F (M=Ca, Sr, Ba)中Sm3+的电荷迁移态及Sm3+和Eu3+的电荷迁移能量关系[J].无机化学学报,2008,24(3):333-339. |
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