Synthesis, size control and luminescence properties of monodispersed(Y,Gd)2O3:Eu3+ phosphor microspheres

单分散(Y,Gd)2O3:Eu3荧光粉微球的合成、尺寸控制及发光性能

• 批准号: 22550135
• 负责人: LI Jiguang
• 金额: $ 3.08万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22550135/
• 关键词: コロイド; 超微粒子; 蛍光体; 光物性; 球形微粒子; 単一分散; 均一沈殿合成; 蛍光特性; 酸化物蛍光体; 溶媒効果; 粒径制御; 同時沈殿; 多蛍光色球形微粒子; 酸化物螢光体; 形態制御; 単一分散・球形微粒子; 水熱合成; 有機溶媒

Synthesis and size control of monodisppered microspheres of Ln(OH)CO3・nH2O (Ln=Y,Gd,Eu) have been successfully achieved via homogeneous precipitation. Formation domain of the monospheres was defined. It was found that the addition of organic co-solvent promotes coprecipitation of the constituent rare-earth cations. Dispersed (Y,Gd)2O3:Eu3+ phosphor microspheres were obtained by calcining the basic carbonate precursors. It was confirmed that the phosphor monospheres exhibit stronger luminescence of Eu3+ at a decreased particle size. Utilizing the energy transfer from Gd3+ to Eu3+, the luminescence intensity was enhanced. Owing to the lower electronegativity of Gd3+ than Y3+, the phosphors exhibit red-shifted center of the charge transfer excitation band at a higher Gd3+ content. The fluorescence lifetime was determined to be about 1.5 ms for the phosphors, irrespective of the Gd3+ content.

通过均匀沉淀成功实现了 Ln(OH)CO3·nH2O (Ln=Y,Gd,Eu) 单分散微球的合成和尺寸控制。溶剂促进稀土阳离子的共沉淀，得到分散的(Y,Gd)2O3:Eu3+荧光粉微球。通过煅烧碱式碳酸盐前体，证实了荧光粉单球在较小的粒径下表现出更强的发光，利用从 Gd3+ 到 Eu3+ 的能量转移，由于 Gd3+ 的电负性低于 Y3+，发光强度得到增强。在较高的 Gd3+ 含量下，荧光粉的电荷转移激发带中心发生红移，荧光寿命确定为约 1.5 ms。对于荧光粉，无论 Gd3+ 含量如何。

项目成果

Layered rare-earth hydroxides (LRHs): hydrothermal processing, structure characterization, and the exploration of opto-functionalities

层状稀土氢氧化物（LRH）：水热处理、结构表征和光功能探索

• 发表时间: 2012
• 作者: Q.Zhu;李継光;李暁東;孫旭東;李継光
• 通讯作者: 李継光

Generalized wet-chemical processing of phosphor monospheres and the effects of composition on photoluminescence

荧光粉单球的广义湿化学处理及其成分对光致发光的影响

• DOI: 10.1088/1757-899x/18/4/042002
• 发表时间: 2011
• 期刊: IOP Conference Series: Materials Science and Engineering
• 作者: 李継光;Zhu Qi;Li Xiaodong;Sun Xudong;石垣隆正
• 通讯作者: 石垣隆正

Colloidal processing of Gd2O3:Eu3+ red phosphor monospheres of tunable sizes: Solvent effects on precipitation kinetics and photoluminescence properties of the oxides

• DOI: 10.1016/j.actamat.2011.03.004
• 发表时间: 2011-05-01
• 期刊: ACTA MATERIALIA
• 影响因子: 9.4
• 作者: Li, Ji-Guang;Zhu, Qi;Sakka, Yoshio
• 通讯作者: Sakka, Yoshio

Layered rare-earth hydroxides of (Y_<1-x>Eu_x)_2(OH)_5NO_3・nH_2O (x=0-1) : structural variations by Eu^<3+> doping, phase conversion to oxides, and the correlation of photoluminescence behaviors

(Y_<1-x>Eu_x)_2(OH)_5NO_3・nH_2O (x=0-1) 的层状稀土氢氧化物：Eu^<3+> 掺杂引起的结构变化、氧化物相转变以及以下关系光致发光行为

• 发表时间: 2010
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: Q.Zhu;李継光;支春義;李暁東;孫旭東;目義雄;D.Golberg;坂東義雄
• 通讯作者: 坂東義雄

Selective Processing, Structural Characterization, and Photoluminescence Behaviors of Single Crystalline (Gd1-xEux)2O3 Nanorods and Nanotubes

• DOI: 10.2174/157341310797574943
• 发表时间: 2010-09
• 期刊: Current Nanoscience
• 影响因子: 1.5
• 作者: Q. Zhu;Ji-guang Li;Xiaodong Li;Xudong Sun