纳米粉体Y2O3:Ti 3+ , Eu3+的光谱性能

摘要/Abstract

摘要：

采用共沉淀法在氮氢气氛中制备出Y₂O ₃:Ti ³⁺, Eu ³⁺纳米粉体，测量了它的XRD、激发与发射光谱，观测了形貌。通过与Y₂O ₃:Ti ³⁺纳米粉体的光谱比较分析，发现Y₂O ₃中的Ti ³⁺至Eu³⁺存在能量传递，以致紫外至蓝光区域的光，均能使Eu³⁺经5D0→7F2等跃迁通道发射出610nm左右的荧光，于是增强了粉体在红橙光区发光的比重，因此可以调节粉体的发光性能。Y₂O ₃:Ti ³⁺纳米粉体的吸收带从紫外延伸到蓝光区，强荧光带覆盖了整个可见光区，这预示它有望成为新一代白光LED或汞灯的光转换荧光粉。

关键词: 材料, 荧光粉, 纳米粉体

Abstract:

Y₂O₃:Ti³⁺, Eu³⁺ nanopowder was prepared by co-precipitation method in N2 and H2 atmosphere. Its XRD, excitation and emission spectra were measured, its morphology was observed. By analysis and comparison of spectra to Y2O3:Ti3+,Eu3+ and Y2O3:Ti3+, it was discovered that there exists energy transfer process from Ti3+ ions to Eu3+ ions, so Eu3+ ions can be excited by ultraviolet or blue light and emit fluorescence peaks at about 610nm via 5D0→7F2 transition channel etc. As a result the fluorescence in the red and orange light area is strengthened, therefore luminescence properties of the powder may be adjusted. The excitation spectrum of Y2O3:Ti3+,Eu3+ nanopowder extends from ultraviolet to blue-green region, and the strong fluorescence covers entire visible light region. It indicates that Y2O3:Ti3+,Eu3+ nanopowder is expected to be a new generation light conversion phosphor for white LED or mercury lamp.

Key words: materials, phosphor, nanopowder

中图分类号:

O433

曾贵平,姚李,董强,鲍巍涛. 纳米粉体Y₂O₃:Ti³⁺, Eu³⁺的光谱性能[J]. J4, 2011, 28(2): 147-151.

ZENG Guiping, YAO Li, DONG Qiang, Bao Weitao. Spectroscopic properties of nanopowder Y₂O₃:Ti³⁺, Eu³⁺[J]. J4, 2011, 28(2): 147-151.

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纳米粉体Y₂O₃:Ti³⁺, Eu³⁺的光谱性能

Spectroscopic properties of nanopowder Y₂O₃:Ti³⁺, Eu³⁺

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