| 沉淀法合成纳米晶上转换发光材料Y2O2S∶Yb，Er |
| Synthesis of Nanocrystalline Y2O2S∶Yb,Er Upconversion Luminescence Material by Coprecipitation |
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| 摘要: 采用沉淀法在不同温度下合成了纳米上转换发光材料Y2O2S∶Yb,Er，运用XRD、TEM和上转换发光光谱对其进行表征。结果表明，使用该法在700℃即能合成纳米上转换发光材料Y2O2S∶Yb,Er，随着合成温度的升高，产物的粒径从60到120 nm逐渐增大。上转换发光光谱显示该材料主要有2个发射带，其中红光发射的中心波长位于668 nm，绿光发射的中心波长位于525和550 nm。此外，对材料的上转换发光过程进行了探讨。 |
| 关键词: 沉淀法 上转换发光 能量传递 |
| 基金项目: |
| Abstract: The up-conversion luminescence material yttrium oxysulfide doped with Yb3+/Er3+ was systhesized by coprecipitation method followed by subsequent thermal decomposition in presence of sulphur. The products were characterized by XRD, up-conversion luminescence spectra and TEM. The XRD results indicate that the synthesis temperature is up to 700 ℃. And from the TEM, the average diameter of particles is in the range of 60～120 nm, and augmented with the increase of temperature. The materials under 980 nm laser excitation presents strong green emission related to 2H11/2, 4S3/2→4I15/2 Er transitions as well as the red ones, 4F9/2→4I15/2. The upconversion mechanism is discussed too. |
| Keywords: coprecipitation upconversion luminescence energy transfer |
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| 张俊文,谭宁会,刘应亮,满石清.沉淀法合成纳米晶上转换发光材料Y2O2S∶Yb，Er[J].无机化学学报,2010,26(2):229-232. |
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