【 中文摘要 】本发明公开了一种LaSi2N3O晶体及荧光粉和制备方法。该晶体属于正交晶系，晶胞参数a=7.8242(1)Å、b=18.245(4)Å、c=4.8656(1)Å，V=694.59(2)Å3，Z=8。该荧光粉用化学通式La1‑xSi2N3O : xCe3+表示, 其中0.005≤x≤1。本发明中荧光粉以LaSi2N3O为基质材料，具有全新的化学组成，Ce3+作为激活离子，其光谱半峰宽为68 nm，内量子效率为61.6%，该荧光粉热稳定性好，在近紫外光激发下能发射蓝光，荧光粉的激发带和紫外芯片能够很好的匹配。

【 英文摘要 】The present invention discloses aLaSi2N3O crystal and phosphor and preparation method. The crystal belongs to the orthogonal crystal system, and the unit cell parameters a=7.8242(1)Å, b=18.245(4)Å, c=4.8656(1)Å, V=694.59(2)Å3, Z=8. This phosphor is represented by the chemical formula La1-x Si2N3O : xCe3+, where 0.005≤x≤1. In the present invention, the phosphor uses LaSi2N3Oas the matrix material, has a new chemical composition, Ce3+ as the activating ion, its spectral half-peak width is 68 nm, the internal quantum efficiency is 61.6%, the phosphor has good thermal stability, can emit blue light under near-ultraviolet excitation, and the excitation band of the phosphor and the ultraviolet chip can be well matched.

【 技术功效 】