| Eu3+离子在Ca2PbO4一维结构基质中的发光研究 |
| Photoluminescence of Eu3+-doped Ca2PbO4 with One-dimensional Structure |
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| 摘要: |
| 关键词: Ca2-xEuxPbO4 一维结构 光致发光 |
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| Abstract: A Eu3+-doped Ca2PbO4 with one-dimensional structure was prepared with a solid-state reaction method and its characteristics were investigated. The XRD results show that the substitution of Ca2+ by Eu3+ has no influence on the structure of Ca2PbO4. Under the excitation of ultraviolet light， the Ca2PbO4:Eu3+ phosphor exhibits strong red emission at about 618 nm which is assigned to the 5D0- 7F2 electric-dipole transition. The compounds Sr2CeO4 and Ca2SnO4 have the same crystal symmetry as that of Ca2PbO4 and it is found that the emission intensity of Ca2PbO4∶Eu3+ is higher than that of Sr2CeO4∶Eu3+ and lower than that of Ca2SnO4∶Eu3+. The excitation spectrum of Ca2PbO4∶Eu3+ appears to be a broad band with two peaks at about 289 nm and 340 nm. The former peak is attributed to the Eu3+-O2- charge transfer transition， while the latter one may be related to the absorption of Ca2PbO4 host or its crystal defects. |
| Keywords: Ca2-xEuxPbO4 one-dimensional structure photoluminescence |
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| 陈 洁,柴 飞,尹 涛,张汉焱,符史流.Eu3+离子在Ca2PbO4一维结构基质中的发光研究[J].无机化学学报,2007,23(10):1801-1804. |
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