A novel red phosphor Sr5 (BO3)3Cl:Eu3+ was prepared by high temperature solid state reaction method.Its luminescence properties and structure were studied.X-ray power diffraction show that the fabricated samples are pure phase crystals.The emission spectra of the Sr5 (BO3)3Cl:Eu3+ phosphors consist of some sharp emission peaks of Eu3+ ions,which centered at 587,596,613nm and 626nm,corresponding to the 5D0→7F1,7F2 typical transitions of Eu3+ respectively.Monitoring emission at 626nm,the strongest excitation spectra appears at 392nm,which indicate that this phosphor can be excited effectively by InGaN.The decay time of 5D0 level in Eu3+ is 2.28ms.The effect of Eu3+ concentration on the emission spectrum intensity of Sr5 (BO3)3 Cl:Eu3+ was investigated.The results show that the emission spectrum intensity increase with raising Eu3+ concentration until reach the maximum value at 16 ％(mole fraction),then it decrease.The critical distance of Eu3+ was calculated as 1.46nm.The CIE coordinates of Sr5 (BO3)3Cl:Eu3+ were measured,which were very close to the NTSC standard.%采用高温固相法合成了Sr5 (BO3)3Cl:Eu3+新型红色发光材料,并对其结构和发光特性进行了研究.X射线衍射测试表明合成材料为纯相Sr5 (BO3)3Cl晶体.材料的主发射峰位于587,596,613nm和626nm,对应Eu3+的5 D0 →7F1,7F2辐射跃迁.监测626nm发射峰,激发光谱主峰位于392nm,可被InGaN管芯有效激发.通过时间分辨光谱测得Eu3+离子5 D0能级的荧光寿命约为2.28ms.研究了Eu3+离子掺杂浓度对Sr5(BO3)3Cl:Eu3+发光性能的影响,结果随着Eu3+离子浓度的增大,样品的发光强度先增大后减小,最佳掺杂浓度为16％(摩尔分数).计算了Eu3+离子浓度猝灭的临界距离为1.46nm.测量了不同Eu3+浓度样品的色坐标,均位于色品图红光区,符合NTSC标准.
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