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[1]孔仕进,张占辉*,彭伟康,等.Na1.3Ca0.4-xSrxPO4:0.3Eu3+红色荧光粉的制备及发光性质[J].武汉工程大学学报,2018,40(06):637-640.[doi:10. 3969/j. issn. 16742869. 2018. 06. 010]
 KONG Shijin,ZHANG Zhanhui*,PENG Weikang,et al.Preparation of Red-Emitting Na1.3Ca0.4-xSrxPO4:0.3Eu3+ Phosphors and Their Luminescent Properties[J].Journal of Wuhan Institute of Technology,2018,40(06):637-640.[doi:10. 3969/j. issn. 16742869. 2018. 06. 010]
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
40
期数:
2018年06期
页码:
637-640
栏目:
材料科学与工程
出版日期:
2018-12-28

文章信息/Info

Title:
Preparation of Red-Emitting Na1.3Ca0.4-xSrxPO4:0.3Eu3+ Phosphors and Their Luminescent Properties
文章编号:
20180610
作者:
孔仕进张占辉*彭伟康齐同刚黄志良*
武汉工程大学材料科学与工程学院,湖北 武汉 430205
Author(s):
KONG Shijin ZHANG Zhanhui* PENG Weikang QI Tonggang HUANG Zhiliang*
School of Materials and Engineering,Wuhan Institute of Technology,Wuhan 430205,China
关键词:
高温固相法Na1.3Ca0.4-xSrxPO4:0.3Eu3+红色荧光粉掺杂LED
Keywords:
high temperature solid-state methodNa1.3Ca0.4-xSrxPO4:0.3Eu3+red phosphorsdopinglight-emitting diode
分类号:
O646
DOI:
10. 3969/j. issn. 16742869. 2018. 06. 010
文献标志码:
A
摘要:
为提高磷酸钠钙红色荧光粉的发光强度,采用高温固相法制备了Na1.3Ca0.4-xSrxPO4:0.3Eu3+系列荧光粉,通过X-射线衍射仪(XRD)和荧光分光光度计分析该系列样品的物相结构、发光性能以及最佳掺杂浓度。XRD结果表明,Sr2+取代Ca2+占据中心格位,晶相有逐渐由NaCaPO4向NaSrPO4转变的趋势,结晶性能良好。荧光光谱分析表明,随着Sr2+掺杂浓度的提高,在近紫外光区的395 nm和蓝色光区的465 nm处的激发峰强度均显著增强。由于掺杂离子之间电负性和离子半径的差异,导致电子云效应的形成和晶体场强度的降低,增大了5D0→7F2跃迁发射的能量,使得在618 nm处的发射峰强度明显提高,而且其峰位逐渐向短波长方向移动。当Sr2+完全取代Ca2+后,荧光粉发射强度提高了21%,表明Na1.3Ca0.4-xSrxPO4:0.3Eu3+是一种有望应用于白光发光二极管的红色荧光粉。
Abstract:
series of Na1.3Ca0.4-xSrxPO4:0.3Eu3+ phosphors were prepared by high temperature solid state reaction. The phase structures and luminescent properties of the materials were analyzed by X-ray diffraction(XRD)and fluorescence spectroscopy respectively,which then helpfully determined the optimum doping concentrations of the samples. XRD results show that Sr2+ replaces Ca2+ and occupies the central lattice, and the crystalline phase of NaCaPO4 almost changes into that of NaSrPO4 with the fine crystallinity. The fluorescence spectroscopy shows that the excitation intensities of the peak at 393 nm in near ultraviolet region and the one at 465 nm in blue light region enhances with increasing doping concentration of Sr2+. The differences of electronegativity and ionic radius between the dopes ions result in the formation of electron cloud effect and the reduction of crystal field intensity,which enhances the transition of 5D0→7F2 . Herein,the relative intensity of emission peak at 618 nm increases with increasing concentration of Sr2+ and the peak position gradually moves towards shorter wavelength. In addition, the emission intensity increases by 21% when Sr2+ completely replaces Ca2+, indicating that Na1.3Ca0.4-xSrxPO4: 0.3Eu3+ is expected to be a new red phosphor used in white light-emitting diode.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-05-25基金项目:国家自然科学基金(51374155);湖北省自然科学基金(2014CFB796);湖北省科技支撑计划项目(2015BAA105,2014BCB034)作者简介:孔仕进,硕士研究生。E-mail:[email protected]*通讯作者:张占辉,博士,教授。E-mail:[email protected];黄志良,博士,教授。E-mail:[email protected]引文格式:孔仕进,张占辉,彭伟康,等. Na1.3Ca0.4-xSrxPO4:0.3Eu3+红色荧光粉的制备及发光性质[J]. 武汉工程大学学报,2018,40(6):637-640.
更新日期/Last Update: 2018-12-22