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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (22): 2729-2732. 上一篇    下一篇

研究论文

尿素辅助的共沉淀模板法制备LSO:Ce3＋发光粉体

许志斌1，范灵聪1，林德宝1，沈思情1，施鹰*,1，许钫钫2，谢建军1   

  1. (1上海大学材料科学与工程学院电子信息材料系 上海 200072)
    (2中国科学院上海硅酸盐研究所 上海 200050)
  • 投稿日期:2011-04-11 修回日期:2011-06-24 发布日期:2011-07-08
  • 通讯作者: 许志斌 E-mail:xuzhibing@126.com
  • 基金资助:

    自然科学基金大科学装置联合基金面上项目;上海市基础重点研究项目;上海市重点学科

Synthesis of LSO:Ce3＋ Luminescent Powders via Urea-assisted Coprecipitation Template Method

Xu Zhibin1 Fan Lingcong1 Lin Debao1 Shen Siqing1 Shi Ying*,1 Xu Fangfang2 Xie Jianjun1   

  1. (1 Department of Electrical Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200072)
    (2 Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050)
  • Received:2011-04-11 Revised:2011-06-24 Published:2011-07-08

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采用尿素辅助的共沉淀模板法, 通过在单分散的SiO2微球模板上包覆Lu(OH)3制备出了具有核-壳结构的SiO2@Lu(OH)3粉体颗粒, 经煅烧后得到了LSO:Ce3+荧光粉体. 结果发现煅烧温度对荧光粉的相组成和形貌都产生了很大影响. 当在1200 ℃下煅烧2 h时, 得到了单相LSO:Ce3+粉体. 在900 ℃煅烧后的粉体颗粒呈球形, 粒径大约为400～500 nm, 随着煅烧温度的升高, 粉体形状变得不规则, 而且有团聚现象. 采用PL光谱仪对1200 ℃煅烧的粉体进行了光学性能表征, 结果表明其激发谱中的最强激发峰位于360 nm处, 发射谱表现为位于384～440 nm范围内宽发射峰中心420 nm, 归因为Ce3+的5d→4f间的电子跃迁.

关键词: 硅酸镥, 共沉淀模板法, 光学性能, 制备

Core-shell structured SiO2@Lu(OH)3 particles have been successfully fabricated via a urea-assisted homogeneous precipitation method using Stöber method derived silica as templates. LSO:Ce3＋ phosphors were obtained by a subsequent calcination procedure. It was found that the calcinations temperature had a great influence on the phase and morphology of the final phosphors. A single-phase LSO:Ce3＋ was prepared at 1200 ℃ for 2 h. The sample treated at 900 ℃ shows spherical morphology with the particle size of about 400～500 nm, while the sample calcined at higher temperature displays irregular shape with some aggregation. The photoluminescence (PL) spectra of the sample treated at 1200 ℃ were investigated. The excitation spectrum is dominated by a broad band centered at 360 nm. Monitored with 360 nm UV emission, the emission spectrum consists of a broad band ranging from 384 nm to 440 nm with a maximum peak at 420 nm, which can be attributed to the 5d→4f transition of Ce3＋.

Key words: Lu2SiO5, coprecipitation template method, luminescent property, preparation