| 耿秀娟,杨旭,李梓杨,陈永杰,杨英,张学军.Eu3+-Bi3+共掺杂Ca0.7Sr0.3MoO4荧光粉发光性能的研究[J].光电子激光,2015,26(5):905~909 |
| Eu3+-Bi3+共掺杂Ca0.7Sr0.3MoO4荧光粉发光性能的研究 |
| Luminescence investigation of Eu3+-Bi3+ co-doped Ca0.7Sr 0.3MoO4phosphor |
| 投稿时间：2015-01-14 |
| DOI： |
| 中文关键词: 高温固相 发光性能 敏化发光 |
| 英文关键词:high temperature solid-phase method luminescent properties sensitized lumin escence |
| 基金项目:辽宁自然科学基金(2013020082)和辽宁省博士科研启动基金(20141079)资助项目 (沈阳化工大学 辽宁省稀土化学及应用重点实验室辽宁沈阳 110142) |
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| 中文摘要: |
| 采用高温固相法制备了Ca0.7Sr0.18M oO4:0.08 Eu3+、Ca0.7Sr0.27MoO4:0.02Bi3+和Ca0.7Sr0.18－1.5xMoO4:0.08Eu3+,xBi3+红色 荧光粉,考察Bi3+浓度对荧光粉发光性能的影响以及Bi3+与Eu3+间的能 量传递。通过X射线衍射(XRD)以及荧光的激发、发射光谱 对荧光粉样品进行表征。结果表明,制备的Ca0.7Sr0.15MoO4:0.08Eu3+ ,0.02Bi3+红色荧光粉属于白钨矿结构。在 Ca0.7Sr0.15MoO4:0.08Eu3+,0.02Bi3+红色荧光粉中,由于Bi 3+的掺杂将吸收的能量传递给激活离子Eu3+,其发光强度得到 增强。当Bi3+掺杂量x=0.02时,在312 nm激发下,主发 射峰 在616 nm处的相对发光强度最大,属于Eu3+的5D0→7F2跃迁, 但掺杂浓度过高时会出现浓度猝灭现象,发光强度减弱。 |
| 英文摘要: |
| Red phosphors Ca0.7Sr0.18MoO4:0.08Eu3+,Ca0.7Sr0.27MoO4: 0.02Bi3+ and Ca0.7Sr0.18－1.5xMoO4:0.08Eu3+,xBi3+ were prepared by high temperature solid-phase method reaction.The influ ence of the concentration of Bi3+ on the luminescent properties of phosphors.The phosphors are characterized by X-ray diffraction (X RD) and fluorescenc e spectrophotometer,and the luminescent properties are characterized by excitation spectra and emission spectra.The experimental results indicate that the phase structure of the phosphor Ca0.7Sr0.15MoO4:0.08Eu3+,0.02Bi3+ is scheelit e structure.Bi3+ ions can transfer the absorbed energy to Eu3+ ions in red phosphors of Ca0.7Sr0.15MoO4:0.08Eu3+,0.02Bi3+．When t he dopi ng mole fraction of Bi3+ is 0.02,the relative luminous intensity of 616nm main emission peak is the maximum under the excitation of 312nm,due to t he 5D0→7F2transition of Eu3+.However,th e phenomenon of concentration quenching occurs when Bi3+ doping concentration is higher .The luminescent performance of phosphors are reduced. |
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