摘要
Mn^(4+)掺杂的氟化物荧光粉具有宽带吸收、窄带红光发射、合成工艺简单等特点,在照明及显示领域受到极大关注,但其制备需要用到强腐蚀性的氢氟酸。本研究采用共沉淀法,分别以盐酸、硝酸、磷酸、醋酸替代氢氟酸制备了K_(2)TiF_(6)∶Mn^(4+)荧光粉,采用X射线衍射仪、扫描电子显微镜、荧光光谱仪等对荧光粉的结构、形貌、性能进行表征。结果表明:酸性越强,荧光粉的结晶越好、形貌越完整、发光强度也越高,用强酸制备的样品与用氢氟酸制备的样品发光强度接近。将荧光粉用于制备白光发光二极管(light-emitting diode,LED)器件并进行光色性能的测试,结果表明:红色荧光粉的加入,能显著降低色温、提高显色指数;强酸样品的LED器件与氢氟酸样品的LED器件性能相当。
Mn^(4+)-doped fluoride phosphor has attracted great attention in the field of lighting and display due to its broadband absorption,narrow-band red light emission,and simple synthesis process.However,its preparation requires the use of strong corrosive hydrofluoric acid.In this study,K_(2)TiF_(6)∶Mn^(4+)phosphors were prepared by co-precipitation method using hydrochloric acid,nitric acid,phosphoric acid,and acetic acid were used to replace hydrofluoric acid,respectively.X-ray diffractometer,scanning electron microscope and fluorescence spectrometer were used to characterize the structure,morphology,and properties of the phosphors.The results show that the phosphors prepared with stronger acid have better crystallization,morphology,and higher luminous intensity.The luminous intensity of the samples prepared with strong acid are close to the samples prepared with hydrofluoric acid.Finally,the phosphors were used to prepare white light-emitting diode(LED)devices and their photochromic properties were tested.The results show that the addition of red phosphors can significantly reduce the color temperature and improve the color rendering index.The performance of LED devices of the strong acid sample is similar to that of the hydrofluoric acid sample.
作者
史立帅
孙海清
丁建旭
SHI Lishuai;SUN Haiqing;DING Jianxu(College of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《山东科技大学学报（自然科学版）》
CAS
北大核心
2023年第2期62-69,共8页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家自然科学基金项目(52072225)。
