摘要
利用溶剂热法合成Er^3+/Yb^3+/Ce^3+共掺杂的K2YF5微晶.在980 nm红外激光激发下,微晶产生有效的可见上转换辐射及1.5μm近红外辐射.随着Ce^3+掺杂量的增加,上转换荧光逐渐减弱,而1.5μm红外光随Ce^3+掺杂浓度的增加先增加而后减弱,当Ce^3+掺杂浓度为4%时,1.5μm近红外辐射最强,约为不掺杂Ce^3+样品辐射强度的4倍.微晶发光性能的变化被归因于Er^3+、Ce^3+之间的能量交叉弛豫.结合掺杂离子的能级结构,对微晶的发光机理进行详细的讨论.
Er^3+/Yb^3+/Ce^3+co-doped K2YF5 microcrystal was synthesized by solvothermal method.With 980 nm laser as excitation source,the samples have excellent visible and infrared luminescence emission.With the increase of Ce^3+doping concentration,the up-conversion fluorescence gradually decreases,while the 1.5 um infrared light increases first and then decreases.When the Ce^3+doping concentration is 4%,the 1.5 um near-infrared radiation is the strongest,about 4 times the intensity of the undoped Ce^3+sample.The change in microcrystalline luminescence properties is attributed to the energy cross-relaxation between Er^3+and Ce^3+.The luminescence mechanism of the microcrystals is discussed in detail in combination with the energy level structure of the doped ions.
作者
董浩
朱光平
张敏
代凯
李强
崔超鹏
陈三
DONG Hao;ZHU Guangping;ZHANG Min;DAI Kai;LI Qiang;CUI Chaopeng;CHEN San(School of Physics and Electronic Information,Huaibei Normal University,235000,Huaibei,Anhui,China)
出处
《淮北师范大学学报(自然科学版)》
CAS
2020年第1期33-37,共5页
Journal of Huaibei Normal University:Natural Sciences
基金
国家自然科学基金项目(51572103)
安徽省高校自然科学研究重大项目(KJ2016SD53)
安徽省自然科学青年项目(1908085QA36)