| 稀土掺杂NaGd(WO4)2反蛋白石光子晶体的制备及其发光性能 |
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| 引用本文： | 屈重年,刘旭焱,李果,李根全.稀土掺杂NaGd(WO4)2反蛋白石光子晶体的制备及其发光性能[J].实验室研究与探索,2020(3):45-49,127. |
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| 作者姓名： | 屈重年 刘旭焱 李果 李根全 |
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| 作者单位： | 1.南阳师范学院机电工程学院 |
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| 基金项目： | 国家自然科学基金项目(61306007);河南省高等学校重点科研项目(17A510017)。 |
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| 摘 要： | 使用水热法合成了NaGd(WO4)2:Yb3+,Er3+,Tm3+荧光粉,借助PMMA胶体模板自组装法制备了三维反蛋白石光子晶体,并表征了样品的表面形貌和结构特征。样品具有四方晶系NaGd(WO4)2的晶格结构,电子显微镜观察到规则排布的微球蛋白石模板和退火之后形成的正六边形空腔结构。光谱测试发现,在反蛋白石光子晶体微孔直径185 nm左右时,得到了相对最强的发光增强效果;实验样品中光子带隙的存在显著增强了蓝光发光而抑制了红光发光,导致光子晶体样品整体发光从荧光粉的暖白光转变为偏绿色。对比荧光粉样品,反蛋白石光子晶体样品中Er3+离子4S3/2→4 I15/2的发光寿命显著增加,但光子带隙的变化对寿命影响不大。与参考样品相比,反蛋白石光子晶体样品对温度淬灭现象具有显著的抑制作用。
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| 关 键 词： | 反蛋白石 光子晶体 钨酸钆钠 发光调制 |
Preparation and Characterization of Rare-Earth-Doped NaGd(WO_4)_2 with an Inverse Opal Photonic Crystal Structure |
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| QU Chongnian,LIU Xuyan,LI Guo,LI Genquan.Preparation and Characterization of Rare-Earth-Doped NaGd(WO_4)_2 with an Inverse Opal Photonic Crystal Structure[J].Laboratory Research and Exploration,2020(3):45-49,127. |
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| Authors: | QU Chongnian LIU Xuyan LI Guo LI Genquan |
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| Institution: | (College of Mechanical and Electronic Engineering,Nanyang Normal University,Nanyang 473061,Henan,China) |
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| Abstract: | NaGd(WO4)2:Yb3+,Er3+,Tm3+phosphors were synthesized by hydrothermal method.Then threedimensional inverse opal photonic crystal samples were fabricated by a PMMA colloidal template self-assembly method.The structural characterization indicates that the samples have a lattice structure of tetragonal NaGd(WO4)2.Micro opal templates and hexagonal cavity structure formed after annealing were observed by electron microscopy.It was found by spectral test that the inverse opal photonic crystal sample has the strongest luminescence enhancement when its micropore diameter is about 185nm.Spectral measurements show that the photonic band gap significantly enhances the blue-light emission and suppresses the red-light emission.As a result,luminescence changes from the warm white light of phosphors to the greenish light of photonic crystal samples.Further tests show that the lifetime of Er3+ions 4S3/2→4 I15/2 luminescence in inverse opal photonic crystals increases significantly compared with phosphor samples,but the change of photonic band gaps has little effect on lifetime.Compared with reference samples,inverse opal photonic crystals have significant inhibition on temperature quenching. |
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| Keywords: | inverse opal photonic crystal NaGd(WO4)2 light modulation |
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