| 高掺杂Ce,Gd(Y_(3-x-y)Ce_xGd_y)Al_5O_(12)荧光粉的发光下降及温度猝灭特性 |
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| 引用本文： | 褚明辉,刘学彦,吴 庆,王 健,蒋大鹏,申德振,赵成久,侯凤琴.高掺杂Ce,Gd(Y_(3-x-y)Ce_xGd_y)Al_5O_(12)荧光粉的发光下降及温度猝灭特性[J].无机化学学报,2010,26(2):183-189. |
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| 作者姓名： | 褚明辉 刘学彦 吴 庆 王 健 蒋大鹏 申德振 赵成久 侯凤琴 |
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| 作者单位： | 1. 中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,130033
2. 中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,130033;中国科学院研究生院,北京,100049 |
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| 基金项目： | 吉林省科技发展计划重点项目 |
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| 摘 要： | 采用高温固相法分别合成了不同Ce浓度掺杂的和固定Ce浓度为0.06不同Gd浓度掺杂的Y3Al5O12(YAG)系列荧光粉,通过测量其激发、发射光谱、漫反射光谱、荧光寿命和变温发射光谱,研究了掺杂元素的浓度对荧光粉发光性能的影响以及荧光粉发光的温度猝灭性质。研究结果表明:荧光粉发光强度随着Ce3+掺杂浓度和Gd3+掺杂浓度的提高均呈下降趋势。分析发现,荧光粉发光强度下降并非主要由浓度猝灭所引起,而是由于高浓度掺杂下发生YAG基质与Ce3+对激发光的竞争吸收,导致Ce3+对激发光的吸收量减少,从而影响发光强度。温度实验表明,随着温度的升高,荧光粉发光强度下降。Ce含量的改变对YAG:Ce荧光粉的热猝灭性质影响较小,Gd的掺杂使荧光粉的发射波长向长波方向移动,同时热猝灭现象严重。
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| 关 键 词： | YAG∶Ce 白光LED 发射光谱 发光强度 温度猝灭 |
Luminescence Reduction and Thermally Induced Luminescence Quenching of Ce, Gd Highly Doped (Y3-x-yCexGdy)Al5O12 Phosphors for White LEDs |
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| CHU Ming-Hui,LIU Xue-Yan,WU Qing,WANG Jian,JIANG Da-Peng,SHEN De-Zhen,ZHAO Cheng-Jiu and HOU Feng-Qin.Luminescence Reduction and Thermally Induced Luminescence Quenching of Ce, Gd Highly Doped (Y3-x-yCexGdy)Al5O12 Phosphors for White LEDs[J].Chinese Journal of Inorganic Chemistry,2010,26(2):183-189. |
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| Authors: | CHU Ming-Hui LIU Xue-Yan WU Qing WANG Jian JIANG Da-Peng SHEN De-Zhen ZHAO Cheng-Jiu and HOU Feng-Qin |
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| Institution: | CHU Ming-Hui,1 LIU Xue-Yan1 WU Qing1,2 WANG Jian1,2 JIANG Da-Peng1 SHEN De-Zhen1 ZHAO Cheng-Jiu1 HOU Feng-Qin1(1Key Laboratory of Excited State Processes,Changchun Institute of Optics Fine Mechanics , Physics,Chinese Academy of Science,Changchun 130033)(2Graduate University of Chinese Academy Science,Beijing 100049) |
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| Abstract: | Two series of Y3-xCexAl5O12 and Y2.94-yGdyCe0.06Al5O12 phosphors were synthesized by high-temperature solid reaction method.The influences of doped elements on the luminescence properties were studied by measuring excitation spectra,emission spectra,reflectance spectra,fluorescence lifetimes and the dependence of luminescence intensity on temperatures.The results show that the intensity of the luminescence decreases with the increase of doping concentration.The luminescence decrease is attributed to the par... |
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| Keywords: | YAG Ce YAG:Ce white LED emission spectra luminescence intensity thermal quenching |
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