YPO_4·nH_2O∶Eu^(3+)(n=0,0.8)的水热合成及发光性能  

Hydrothermal synthesis and luminescence properties of YPO_4·nH_2O∶ Eu^(3+)( n =0,0.8)

作　　者：刘运[1,2] 赵高扬[2] 郭雅欣[1] 李朋[1] 史晓磊[1] 

机构地区：[1]陕西科技大学电气与信息工程学院,西安710021 [2]西安理工大学材料科学与工程学院,西安710048

出　　处：《功能材料》2014年第17期17066-17069,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51272148)

摘　　要：采用低温水热法通过控制Eu3+的掺杂浓度合成了YPO4和YPO4·0.8H2O两种结构的晶体粉末。所得样品的结构、形貌和发光性能通过X射线衍射(XRD),场发射扫描电子显微镜(FE-SEM)和荧光光谱仪(PL)进行了表征。结果表明,随着Eu3+掺杂量的增加,YPO4的结构发生了改变,当掺杂量达到13%时,晶相由四方相YPO4变为六方相YPO4·0.8H2O,形貌从不规则的片状变为细棒状。六方相的YPO4·0.8H2O∶Eu3+发光性能弱于四方相YPO4∶Eu3+,但通过后期200℃煅烧处理,失去了结构水的YPO4·0.8H2O的发光强度较直接制备无结构水的YPO4有了大幅度提高。Eu3 ＋-doped YPO 4 and YPO 4 ·0.8H 2 O nano-and micro-crystals were synthesized via low-temperature hydrothermal process by adjusting the doped concentration of Eu3 ＋ .The structure,morphology and luminescence property of the asprepared samples were characterized by the X-ray power diffraction （XRD）,field emission-scanning electron microscope （FE-SEM）and photoluminescence （PL）.The experimental results indicate that the phase structure of the as-prepared samples has been changed with the increasing of the concentration of the Eu3 ＋ ions.When doping concentration of Eu3 ＋ higher than 13%,the tetragonal phase of YPO 4 ∶Eu3 ＋ has been completely transformed to the hexagonal phase of YPO 4 ·0.8H 2 O∶Eu3 ＋ .The morphology of the crystal structure also changed from nanoparticles to bundle-like microstructures composed of nanorods.The luminescence intensities of YPO 4 ·0.8H 2 O ∶Eu3 ＋ are lower than that of YPO 4 ∶Eu3 ＋ synthesized by hydrothermal method.However,pure tetragonal phase of YPO 4 ∶Eu3 ＋ powders were obtained when the powder of YPO 4 ·0.8H 2 O∶Eu3 ＋ annealed at 200 ℃,and the luminescence intensities of YPO 4 ∶Eu3 ＋ also have been greatly improved after loss crystallization water of YPO 4 ·0.8H 2 O∶Eu3 ＋ .

关 键 词：水热合成 YPO4 YPO4·0.8H2O 发光性能 

分 类 号：O482.36[理学—固体物理]