柠檬酸络合法制备CaAl_2O_4:Eu^(2+)发光材料及其性能表征

Properties of CaAl_2O_4:Eu^(2+) Luminescent Materials Prepared by Citric Acid Complex Method

采用柠檬酸络合法制备CaAl2O4:Eu2+,研究制备工艺及掺杂浓度对样品发光性能的影响。对样品进行了XRD、SEM、光谱性能的测试。研究结果表明:在1200℃下的最佳烧结时间为1h,最佳掺杂浓度8at%;样品的激发峰位于354nm,是由于Eu2+的基态4f7(8S7/2)→4f65d(T2g)跃迁产生的,发射峰位于440 nm,对应于Eu2+的4f65d→4f7的跃迁。

In this paper,CaAl2O4：Eu2＋were prepared by citric acid complex method.The effects of preparation and doping concentration on the luminescent properties of samples were studied.XRD,TEM and spectra of samples were measured.The results show that： the optimum sintering temperature is 1200℃,the optimum sintering time is 2h and the optimum doping concentration is 8at%.The excitation peak of samples locates in 354nm due to the ground transition of 4f7（8S7/2）→4f65d（T2g） of Eu2＋,the emission peak locates in 440nm due to the transition of 4f65d→4f7of Eu2＋.