| 金红石TiO2基质中[MoO4]2-基团的上转换发光 |
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| 引用本文： | 吴长锋,秦伟平,秦冠仕,赵丹,张继森.金红石TiO2基质中[MoO4]2-基团的上转换发光[J].无机材料学报,2003,18(3):681. |
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| 作者姓名： | 吴长锋 秦伟平 秦冠仕 赵丹 张继森 |
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| 作者单位： | 国科学院长春光学精密机械与物理研究所激发态物理重点实验室 长春 130022 |
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| 基金项目： | 国家重点基础研究发展规划项目(G1998061309) |
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| 摘 要： | 在978nm激光二极管的激发下,Mo掺杂的TiO2材料表现出很强的宽带上转换发光,该发光来源于MoO4]2-基团的激发态3T1,3T2能级到基态1A1能级的电子跃迁,X射线衍射表明样品为金红石单一相,红外吸收光谱证实了MoO4]2-的存在,由光电子能谱推测体系中还含有低价态的Mo离子,它们提供了上转换得以进行的中间态,高温下的氧化还原处理会改变低价Mo的数量,从而严重影响样品的发光行为。
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| 关 键 词： | 上转换 TiO2 [MoO4]2- |
| 收稿时间： | 2002-04-19 |
| 修稿时间： | 2002-07-17 |
Near-Infrared-to-Visible Photon Upconversion of [MoO4]2- Complexes Doped in Rutile Titania |
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| WU Chang-Feng,QIN Wei-Ping,QIN Guan-Shi,ZHAO Dan,ZhANG Ji-Sen.Near-Infrared-to-Visible Photon Upconversion of [MoO4]2- Complexes Doped in Rutile Titania[J].Journal of Inorganic Materials,2003,18(3):681. |
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| Authors: | WU Chang-Feng QIN Wei-Ping QIN Guan-Shi ZHAO Dan ZhANG Ji-Sen |
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| Affiliation: | Key Laboratory of Excited State Processes; Changchun Institute of Optics; Fine Mechanics and Physics; Chinese Academy of Sciences; Changchun 130022; China |
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| Abstract: | Mo-doped titania excited by a 978nm diode laser exhibits a visible broadband emission which can be controlled by high-temperature chemical redox. The luminescence has been assigned to the transitions from the excited states 3Ti, 3T2 to the ground state 1A1 of the MoO4]2-radicle. FTIR spectrum confirms the presence of the MoO4]2-complexes, while XPS measurement suggests the concurrent existence of lower valent Mo species. The intermediate states available for upconversion are supposed to be related to the lower valent Mo species through which the external chemical redox modifies the luminescence. |
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| Keywords: | upconversion TiO2 [MoO4]-2 |
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