【摘要】 采用高温固相方法合成了(Y,Gd)(P,V)O4∶Eu3+,经X射线结构分析确定为四方晶系,体心结构,空间群为I41/amd[141]。研究了(Y,Gd)(P,V)O4∶Eu3+在VUV及UV激发下的光谱特性,讨论了激活剂Eu3+的浓度对发光亮度的影响。(Y,Gd)(P,V)O4∶Eu3+荧光粉的发射主峰在619 nm,证明Eu3+离子占据了非反演对称中心的位置。在(Y,Gd)(P,V)O4∶Eu3+(监控619 nm)的激发谱,有一个中心位于156 nm的吸收带,它属于基质的吸收带。将(Y,Gd)(P,V)O4∶Eu3+的发光性能与PDP商用红粉(Y,Gd)BO3∶Eu3+进行了比较。(Y,Gd)(P,V)O4∶Eu3+的发射主峰在619 nm,比发射主峰为593 nm的(Y,Gd)BO3∶Eu3+色纯度好,是一种很有应用前景的发光材料。更多还原

【Abstract】 The plasma display panels（PDPs） are regarded as a medium of large-format panel display.The performance and lifetime of a PDP is strongly related to the nature of phosphor used in it.The working of PDPs is realized by a conversion of vacuum ultraviolet（VUV） to visible light.Therefore,it is important for plasma display panel to improve the properties of the phosphors.Nowadays,the red emitting phosphors（Y,Gd）BO₃ ∶Eu³⁺ for plasma display panels has a poor color purity and the first important thing is searching for a new（phosphor） with high color quality.In this work,（Y,Gd）（P,V）O_<sub>4 ∶Eu phosphors was prepared by the conventional solid state reaction method at 1 000¹ 300 ℃.The structure of prepared sample was checked by X-ray diffraction using Cu-Kα（λ=0.154 nm） radiation at room temperature.The XRD data indicated that the sample is tetragonal,body-centered structure and space group is I4₁/amd.Spectroscopic properties of the samples were studied in the VUV/UV range.The variation of the luminescent intensity with Eu³⁺ mol（fraction） was investigated and the sample with 0.07 Eu³⁺ has the highest luminous intensity.The emission spectrum of（Y,Gd）（P,V）O₄ ∶Eu³⁺ is composed of several bonds,respectively,centered at 593,611,619,651,676.5,693.5,708.5,713.5 nm.The emission spectrum was dominated by the red peaks at 619 nm due to the electric dipole transition ⁵D₀→⁷F₂,which indicates that Eu³⁺ occupies a site lacking inversion symmetry.The（orange） peak at 593 nm was the magnetic dipole transition ⁵D₀→⁷F₁.The excitation spectrum of（Y,Gd）-（P,V）O₄ ∶Eu³⁺ in the VUV range can be divided into two regions,one band centered at 156 nm may be（assigned） to the absorption of the host,another band centered at 250 nm was the charge transfer transition of Eu³⁺-O^2-.By comparing the spectrum of（Y,Gd）（P,V）O₄ ∶Eu³⁺ with that of（Y,Gd）BO₃ ∶Eu³⁺,（Y,Gd）-（P,V）O₄ ∶Eu³⁺ offers a better chromaticity than that of（Y,Gd）BO₃ ∶Eu³⁺.更多还原