显示用上转换绿色发光材料NaYF4∶Er,Yb及其特性

采用喷射微波燃烧合成法制备了上转换发光显示器中发绿光的上转换发光材料NaYF4∶Er,Yb.测试了该材料的XRD衍射图谱和发光效率.给出了该材料在1 064 nm三种激光功率激发下的发光光谱.分析了该材料的上转换发光机理，得到545 nm和662 nm峰值发光分别是Er3+的4S3/2→4I15/2和4F9/2→4I15/2跃迁产生的.NaYF4∶Er,Yb具有较强的上转换绿光，同时存在的较弱的红光易于用滤色膜滤除，满足显示对三基色中绿色的要求；并且喷射微波燃烧合成法制备的该材料达到了高分辨率显示应用超细粉体的要求.

Up-conversion Green Luminescent Material NaYF4∶Er,Yb for Optically Written Display

The up-conversion green luminescent material for optically written display,NaYF4∶Er,Yb was prepared by the method of spraying microwave combustion.The structure of the sample was characterized by XRD.And the emission power efficiency was tested as 23 Lm/W.Its up-conversion luminescent spectra in different intensity excited by a 1064nm laser diode were studied.The prepared NaYF4∶Er,Yb shows intense green (545 nm) and red (662 nm) emissions,respectively originated from the 4S3/2→4I15/2,and 4F9/2→4I15/2 transitions of Er3+.The up-conversion luminescence of Er3+ have been presented.Since the green peak is much stronger than the red peak and the red light is easily filtrated by color filters.The red light will have no effect on the display,therefore the prepared NaYF4∶Er,Yb is good candidate of green luminescent material for optically written display based on up-conversion of near infrared light.