CAJ | 학술논문

采用简便的共沉淀法制备了不同Mn4+掺杂摩尔分数的Na2 TiF6∶Mn4+红色荧光粉。通过X射线衍射仪、扫描电子显微镜、红外光谱仪、荧光光谱仪对荧光粉的结构、形貌、傅立叶红外光谱、激发和发射光谱及荧光寿命曲线进行了表征。结果表明,Mn4+的掺杂没有改变Na2 TiF6的晶格结构,样品具有六方结构。 Mn4+最佳掺杂摩尔分数为4.77%,量子效率为74%。在460 nm激发下,最强窄带发射峰位于628 nm处（2Eg-4A2）,色坐标为（0.681,0.317）。2 Eg 能级的荧光寿命曲线遵循双指数衰减,其荧光寿命值为3.148 ms。
채용간편적공침정법제비료불동Mn4+참잡마이분수적Na2 TiF6∶Mn4+홍색형광분。통과X사선연사의、소묘전자현미경、홍외광보의、형광광보의대형광분적결구、형모、부립협홍외광보、격발화발사광보급형광수명곡선진행료표정。결과표명,Mn4+적참잡몰유개변Na2 TiF6적정격결구,양품구유륙방결구。 Mn4+최가참잡마이분수위4.77%,양자효솔위74%。재460 nm격발하,최강착대발사봉위우628 nm처（2Eg-4A2）,색좌표위（0.681,0.317）。2 Eg 능급적형광수명곡선준순쌍지수쇠감,기형광수명치위3.148 ms。
Na2 TiF6∶Mn4+ red phosphors with different Mn4+ doping mole fraction were synthesized by the co-precipitation method. Structure, morphology, photoluminescence excitation and emission spectra as well as decay curve of Na2 TiF6∶ Mn4+ phosphors were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and fluorescence spectrometer. As-prepared Na2 TiF6∶ Mn4+phosphors have hexagonal structures. Under 460 nm excitation, intense red emissions corresponding to 2 Eg-4 A2 transitions of Mn4+ are ob-served. The optimum doping mole fraction of Mn4+ is 4. 77% and the quantum efficiency is 74% for this phosphor. The chromaticity coordinates of the Na2TiF6∶Mn4+phosphors are (0. 681, 0. 317). Decay curve of 2 Eg state for as-prepared Na2 TiF6∶Mn4+ sample fits the second order exponential be-havior, and the average lifetime is 3. 148 ms.