AlPO_4∶xEu^(3+)红色荧光粉的制备及发光性研究

Preparation and luminescent properties of AlPO_4∶xEu^(3+) red-emitting phosphor

采用溶胶-凝胶法制备了AlPO_4:xEu^(3+)红色荧光粉,并对其结构和发光性能进行了分析。研究表明:在1300℃下恒温烧结4h可得到该样品,Eu^(3+)的加入对其结构没有明显的影响,且无杂相生成。通过测试AlPO_4:xEu^(3+)红色荧光粉的发光性能,激发峰位于200-550 nm,在394 nm处有一个很强吸收峰,该荧光粉有多个发射峰,发射主峰位于596nm处,呈现红色。同时研究了Eu^(3+)离子浓度对发光强度的影响,当掺杂浓度为7%时发光强度达到最高,结果表明该荧光粉是一种较好的红色发光材料。

AlPO4：xEu^3＋ phosphors were prepared by sol-gel method, and their structure and luminescent intensity were analyzed in detail. The results show that the structure data of these phosphors prepared at 1 300 ℃ are matched well with the standard card, no purity diffraction peaks existed indicate that the introduction of Eu^3＋ do not change the structure of AIPO4. The excitation spectra of AIPO4 ： xEu^3＋ phosphors range from 200 to 550 nm, upon excitation at 394 nm. AIPO4 ： xEu^3＋ phosphors can exhibit a strong emission peak at 596 nm of red light. The maximum luminescence intensity of AIPO4 ：xEu^3＋phosphors can obtain at x=7%. All these results show that Eu^3＋doped AIPO4 phosphor can be a promising phosphor for white light-emitting diodes（LED）.