硅酸盐学报

Si4+掺杂橙红色荧光粉NaBaSixP1?xO4:Eu3+结构和发光性能的影响

作者：左修源陈永杰耿秀娟杨英申秋曹爽王莹

分类号：O482.31; P578.92

出版年,卷(期):页码：2017,45(4):529-535

DOI：10.14062/j.issn.0454-5648.2017.04.11

摘要：

采用高温固相法合成了一系列NaBaSixP1–xO4:Eu3+橙红色荧光粉。表征了荧光粉的晶体结构和发光性能。考察了煅烧温度和Si4+掺杂量对荧光粉结构和发光性能的影响。结果表明：掺杂Si4+对荧光粉的晶型没有明显影响，但是导致了晶格膨胀。750 ℃煅烧时基质已形成NaBaPO4相，晶型为六方晶系，荧光粉发射峰强度最强。激发光谱由200~280 nm的宽带和310~500 nm的一系列尖峰组成，分别对应于O2–→Eu3+电荷迁移带和Eu3+的f→f能级跃迁吸收，最强激发峰位于393 nm左右，与近紫外LED芯片的发射光谱匹配。在393 nm近紫外光激发下，最强发射峰和次强发射峰分别位于红光616 nm和橙光591 nm附近，分别属于Eu3+的5D0→7F2和5D0→7F1特征跃迁。NaBa0.92SixP1–xO4:0.08Eu3+中Si4+的最佳掺杂量为 0.02 mol，NaBa0.92Si0.02P0.98O4: 0.08Eu3+样品在616 nm和591 nm附近的发射强度比单掺杂Eu3+的样品分别提高了66.6%和63.6%。

Orange-red light-emitting phosphors NaBaSixP1–xO4:Eu3+ were synthesized by a high-temperature solid-state method. The crystal structure and luminescence properties of the phosphors were characterized. The effects of calcination temperature and Si4+ doping amount on the crystal structure and spectra properties of the phosphors were investigated. The results indicate that doped Si4+ has no obvious influence on the crystal form of phosphors, but leads to the expansion of the lattice. after the calcination at 750 ℃, the structure of the matrix crystal is formed, belonging to a hexagonal crystal system, and the luminescence intensity of phosphors is the most intense. The excitation spectra includes a broadband in the range of 200?280 nm and a series of spikes in 310?500 nm with the maximum excitation peak of wavelength at 393 nm that matches with the near ultraviolet (UV) LED chip, and each peak belongs to O2–→Eu3+ charge transfer band and f→f energy level transition of Eu3+, respectively. Under the near UV excitation at 393 nm, the maximum emission peak and the sub-maximal emission peak appear near-red light at 616 nm and orange light at 591 nm, which belong to 5D0→7F2 and 5D0→7F1 transition of Eu3+, respectively. The optimum doping amount of Si4+ in NaBa0.92SixP1–xO4:0.08Eu3+ is 0.02 mol, the emission intensities of Eu3+ at 616 nm and 591 nm in NaBa0.92Si0.02P0.98O4:0.08Eu3+ sample are 66.6% and 63.6%, which are greater than those of NaBa0.92PO4:0.08Eu3+ sample.

基金项目：

辽宁省科技厅自然科学基金项目(LS 201102174)。

作者简介：

左修源(1990—)，男，硕士研究生。

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