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磷灰石结构荧光粉Ba10(PO4)6F2∶Ce3+,Tb3+的合成、发光和能量传递 预览

Synthesis, Luminescent Properties and Energy Transfer Behavior of Apatite Phosphor Ba10(PO4)6F2∶Ce3+,Tb3+
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摘要 采用高温固相法合成了系列Ce3+和Ce3+/Tb3+激活的具有磷灰石结构荧光粉Ba10(PO4)6F2。用X射线衍射(XRD)、扫描电镜(SEM)、激发和发射(PLE和PL)光谱对样品进行了表征分析。研究结果表明:所合成的荧光粉Ba10(PO4)6F2∶Ce3+,Tb3+具有氟磷灰石结构,样品微观呈现不规则形貌。荧光粉Ba10-x(PO4)6F2∶xCe3+的相对发射强度随着x增加而增强,当x=0.09时,荧光强度达到最大。荧光粉Ba10(PO4)6F2∶Ce3+,Tb3+的激发光谱为240~330nm的宽带,发射光谱呈现出Ce3+的5d→4f跃迁紫外光(335和358nm)发射和Tb3+的4f→4f跃迁绿光(542nm)发射。光谱特性表明,发光过程中存在Ce3+→Tb3+能量传递,能量传递效率可以达到60%。计算Ce3+和Tb3+的临界距离为0.79nm,能量传递机理是偶极-偶极交互作用。此外,详细论述了Ce3+和Tb3+之间的能量传递和发光的过程。通过调节Tb3+的掺杂浓度,对荧光粉发光色坐标与Tb3+的掺杂浓度之间的关系也进行了研究,随着Tb3+的掺杂量从0增加0.52,荧光粉Ba10(PO4)6F2∶Ce3+,Tb3+的发射光谱色坐标可以从(0.1494,0.0451)蓝色区变化到(0.2801,0.5853)绿色区。 A series of Ce3+- and Ce3+/Tb3+-activated Ba10(PO4)6F2 phosphors with apatite structure have been synthesized via high temperature solid-state reaction. X-ray diffraction (XRD), scanning electron microscopy (SEM), the photoluminenscence excitation (PLE) spectra and photoluminescence (PL) spectra were used to characterize samples. The results revealed that the fluorapatite structured Ba10(PO4)6F2∶Ce3+,Tb3+ phosphor particles with irregular morphology have been obtained. The relative intensities of PL spectra of Ba10-x(PO4)6F2:xCe3+ phosphors increased with increasing x values, and reached the maximum at x=0.09. The as-prepared phosphors Ba10(PO4)6F2∶Ce3+,Tb3+ phosphors exhibited broad excitation band ranging from 240 to 330 nm. The emission spectra of Ba10(PO4)6F2∶Ce3+,Tb3+ phosphor showed the violet-emitting band centered at 335 and 358 nm and green light-emitting band centered at 542 nm, which originate from the 5d→4f transitions of Ce3+ and 4f→4f transitions of Tb3+, respectively. The spectral characteristics showed that the energy transfer occurs from Ce3+ to Tb3+ in Ba10(PO4)6F2∶Ce3+,Tb3+ phosphors, and the energy transfer efficiency between Ce3+ and Tb3+ could reach up to 60%. The critical distance of Ce3+ and Tb3+ was calculated to be 0.79 nm, and the mechanism of energy transfer from Ce3+ to Tb3+ is dipole-dipole interaction. In addition, the energy transfer behavior and luminescence process were discussed in detail. By adjusting the concentration of Tb3+, the relationship between chromatic coordinate and the doping concentration of Tb3+ was studied. The Ba10(PO4)6F2∶Ce3+,Tb3+ phosphors emission color could adjust from blue to green, and the chromatic coordinate tuned from (0.149 4, 0.045 1) to (0.280 1, 0.585 3) with increasing the concentration of Tb3+ from 0 to 0.52.
作者 程少文 张娜 卓宁泽 朱月华 陈永浩 蒋鹏 杜文慧 叶恩淦 王海波 CHENG Shao-Wen;ZHANG Na;ZHUO Ning-Ze;ZHU Yue-Hua;CHEN Yong-Hao;JIANG Peng;DU Wen-Hui;YE En-Gan;WANG Hai-Bo(Energy Science and Engineering, Nanjing Tech University, Nanjing 211816, China;Institute of Electronic and Photonic Materials of Light Industry, Nanjing 210015, China;Research Institute of Electronic and Photonic Materials, Nanjing Tech University, Nanjing 210015, China;College of Material Science and Engineering, Nanjing Tech University, Nanjing 210009, China)
出处 《无机化学学报》 SCIE CAS CSCD 北大核心 2019年第2期209-216,共8页 Chinese Journal of Inorganic Chemistry
基金 国家重点研发计划(No.2017YFB0404300,2017YFB0404301) 江苏省自然科学基金(No.BK20171128) 江苏省科技成果转化(No.BA2017100)资助项目。
关键词 高温固相法 氟磷灰石 Ce3+/Tb3+激活荧光粉 发光 能量传递 high-temperature solid-state reaction fluorapatite Ce3+/Tb3+- activated phosphor luminescence energy transfer
作者简介 通信联系人:张娜,E-mail:wanghaibo88@163.com;通信联系人:王海波,E-mail:zhangna8389@163.com
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