摘要
Mn^(4+)离子^(2)E_(g)→^(4)A_(2g)跃迁是宇称和自旋禁戒跃迁,在Mn^(4+)激活荧光粉中获得该跃迁的强零声子线(Zero Phonon Line,ZPL)荧光既有科学意义又有应用价值。本文对具有强ZPL发射特征的Mn^(4+)激活氟氧化物红光荧光粉的制备、晶体结构和荧光性质进行总结。发现了一些规律:目前强ZPL发射氟氧化物荧光粉中心阳离子有Nb^(5+)/Mo^(6+)/Ta^(5+)/W^(6+)四种,Mn^(4+)在其中掺杂时都为对高价态离子的不等价取代;基质晶格所含八面体形成畸变是获得强ZPL发射的必要条件;Mn^(4+)在部分氟氧化物中ZPL可强于Stokesν_(6)声子伴峰,而在部分氟氧化物中ZPL又弱于ν_(6)峰强度;强ZPL发射Mn^(4+)激活氟氧化物荧光粉中ZPL波长位于619~628 nm之间,与Mn^(4+)在常见氟化物中的发光能量接近;ZPL与ν_(6)峰的强度比不仅与基质化学组成有关,对于某一荧光粉,该比值也随制备方法的改变而变化。
The ^(2)E_(g)→^(4)A_(2g) transition of Mn^(4+)ion is parity-and spin-forbidden.For Mn^(4+)-activated phosphors,it is of both scientific and industrial interest to obtain intense zero phonon line(ZPL)emission of this transition.In this re-view,the synthesis,crystal structure and luminescence property of Mn^(4+)-doped oxyfluoride phosphors with intense ZPL were summarized.Some rules have been found.The cations forming octahedron in oxyfluoride phosphors with intense ZPL include Nb^(5+)/Mo^(6+)/Ta^(5+)/W^(6+),which have higher valence state than Mn^(4+)and are heterovalent for Mn^(4+)sub-stitution.Distortion of octahedron in the oxyfluoride host lattice is necessary to obtain intense ZPL.The ZPL can be more intense than the Stokesν_(6) phonon sideband emission in some oxyfluorides,while in some others,it can be low-er than theν_(6) emission.The wavelength of the ZPL in typical oxyfluorides is ranging from 619 nm to 628 nm,close to the luminescence energy of Mn^(4+)in typical fluorides.The ZPL/ν_(6)(Stokes)intensity ratio is not only dependent on the chemical composition of the phosphor,but also varies with the preparation method for a specific phosphor.
作者
屈巧
张文睿
贺璐璐
姬海鹏
QU Qiao;ZHANG Wenrui;HE Lulu;JI Haipeng(Key Laboratory of Advanced Energy Catalytic and Functional Material Preparation of Zhengzhou City,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Materials Science and Engineering,Zhengzhou University(Luoyang Campus),Luoyang 471099,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2023年第5期786-800,共15页
Chinese Journal of Luminescence
基金
国家自然科学基金(51902291)
中国博士后科学基金(2019M662524)
河南省博士后科研启动基金(19030025)
河南省重点研发与推广专项(212102210180)
河南省青年人才托举工程项目(2022HYTP016)。
