| Author Name | Affiliation | E-mail | | Hai Guo¤ | Department of Physics, Zhejiang Normal University, Jinhua 321004, China; Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China | ghh@zjnu.cn | | Yan-min Qiao | Department of Physics, Zhejiang Normal University, Jinhua 321004, China | | | Ju-fang Zheng | Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China | | | Lei-hong Zhao | Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China | |
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| Abstract: |
| Er3+ doped SrTiO3 ultrafine powders were prepared by solid state reaction in a molten NaCl flux. The structural properties were characterized by X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. The Stokes emission spectra of Er3+ in SrTiO3:Er3+ ranging from green to near infrared region were investigated under 514.5 nm laser excitation. The green and redupconverted luminescence spectra of Er3+ were measured under excitation into the 4I9=2 level by 785 nm laser. The upconversion mechanisms were studied in detail through laser power dependence and Er3+ ion concentration dependence of upconverted emissions, and results show that excited state absorption and energy transfer process are the possible mechanisms for the upconversion. The upconversion properties indicate that SrTiO3:Er3+ may be used in upconversion phosphors. |
| Key words: SrTiO3, Upconversion luminescence, Excited state absorption, Energy transfer |
| FundProject:省自然科学基金,其它 |
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| Upconversion Luminescence of SrTiO3:Er3+ Ultrafine Powders Produced by 785 nm Laser |
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郭海¤,乔艳敏,郑菊芳,赵雷洪
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| 摘要: |
| 以NaCl熔盐法制备了Er3+掺杂的SrTiO3超细粉末. 用X射线衍射、场发射扫描电镜和傅立叶红外光谱研究了SrTiO3:Er3+的结构性质. 测量了514.5 nm激光激发下样品的Stokes荧光谱. 在785 nm激光激发下，观测到很强的绿色和红色上转换发光. 通过研究上转换发光的激发光功率依赖关系、Er3+浓度依赖关系，研究了上转换发光机理. 指出了可能的激发态吸收过程和能量传递过程. 上转换发光性质表明SrTiO3:Er3+超细粉末可用做上转换荧光粉. |
| 关键词: SrTiO3，上转换发光，激发态吸收，能量传递 |
| DOI：10.1088/1674-0068/21/03/233-238 |
| 分类号: |