阳离子引入对CsPF6:Mn^4+红色荧光粉发光性能的影响

Effects of introducing cations on the luminescence performance of CsPF6:Mn4+phosphor

采用共沉淀法在室温条件下合成了CsPF6:Mn^4+荧光粉,研究了Li^+、Na^+、K^+阳离子的引入对CsPF6:Mn^4+荧光粉发光强度的影响。所制备的系列荧光粉样品均为立方结构纯相。在蓝光激发下,呈现最强峰位于634 nm处的一系列窄带红色发射。加入K^+和Li^+后,发光强度增强,加入Na^+后发光强度有所减弱,其中加入K^+的CsPF6:Mn^4+荧光粉发光强度最强。CsPF6:Mn^4+,K^+荧光粉的发射强度随着温度的上升先增强然后由于非辐射跃迁的增加而降低,在423 K时达到最大值,发射强度相较于未引入阳离子的荧光粉发射强度亦增强。阳离子的引入可以有效提升CsPF6:Mn^4+荧光粉的发光性能。

The CsPF6:Mn4+phosphor was synthesized via a facile co-precipitation route.The effects of introducing cations Li+,Na+and K+into CsPF6:Mn4+phosphor on the luminous intensity were studied.The prepared phosphor samples were all in pure phases.Under blue light excitation,a series of sharp red emission lines appeared,which peaked at 634 nm.After doping with K+and Li+,the emission intensities increased,but after doping with Na+,the emission intensity decreased.Among them,the luminescence intensity of CsPF6:Mn4+phosphor with the addition of K ion was the strongest.The emission intensity of CsPF6:Mn4+phosphor first increased with the rise of temperature and then decreased with the increase of non-radiation transition.It reached its maximum value at 423 K,and the emission intensity also increased,compared with that of phosphors without cation introduction.It is proved that the introduction of cation can effectively improve the luminescence performance of CsPF6:Mn4+phosphor.