CAJ | 학술논문

采用固相法合成了KSr4(BO3)3：xEu2+(KSB：xEu2+)荧光粉，通过X射线粉末衍射(XRD)、扫描电镜( SEM)及光致发光光谱分别研究了样品的晶相、形貌及发光性质。 XRD研究结果表明制备的样品为正交晶系的KSr4(BO3)3单相。当Eu2+的掺杂摩尔分数x为1.5%时，在激发光谱250~550 nm范围内观察到了两个宽带激发，可归属为Eu2+的4f7-4f65d1跃迁；在400 nm激发下，发射谱呈现出一个不对称的黄色发射带，峰值位于560 nm处，可归属于Eu2+的4f65d1-4f7跃迁。因在KSr4(BO3)3化合物中存在3个Sr格位，根据其光谱特征可推测发射谱中非对称的发射带来源于多个Eu2+发光中心。
채용고상법합성료KSr4(BO3)3：xEu2+(KSB：xEu2+)형광분，통과X사선분말연사(XRD)、소묘전경( SEM)급광치발광광보분별연구료양품적정상、형모급발광성질。 XRD연구결과표명제비적양품위정교정계적KSr4(BO3)3단상。당Eu2+적참잡마이분수x위1.5%시，재격발광보250~550 nm범위내관찰도료량개관대격발，가귀속위Eu2+적4f7-4f65d1약천；재400 nm격발하，발사보정현출일개불대칭적황색발사대，봉치위우560 nm처，가귀속우Eu2+적4f65d1-4f7약천。인재KSr4(BO3)3화합물중존재3개Sr격위，근거기광보특정가추측발사보중비대칭적발사대래원우다개Eu2+발광중심。
KSr4 ( BO3 ) 3:xEu2+( KSB:xEu2+) phosphors were synthesized by solid-state reaction method. The phase, morphology, and luminescence properties of the samples were characterized by using XRD, SEM, and photoluminescence spectra. XRD results show that the as-prepared samples are orthorhombic KSr4(BO3)3 single-phase. When x=1. 5%, two broad bands are observed from 250 to 550 nm in the excitation spectra, which are attributed to 4f7-4f65d1 transition of Eu2+. Under the excitation of 400 nm, the emission spectrum shows an asymmetric yellow emission band around 560 nm, attributed to 4f65d1-4f7 transition of Eu2+. Because of three Sr crystallographic sites in KSr4 ( BO3 ) 3 compound, one can infer that the asymmetric emission results from multiple Eu2+ cen-ters by the spectral characteristics.