新型红色荧光粉K_(5)Gd(MoO_(4))_(4)∶xSm^(3+),yEu^(3+)的发光性能分析  

Analysis of Luminescence Performance of New Red Phosphor K_(5)Gd(MoO_(4))_(4)∶xSm^(3+),yEu^(3+)

作　　者：李明明 熊飞兵 杨伟斌[1,2] 胡正开 白鑫 李婧 林雅晴 黄俊雄 LI Mingming;XIONG Feibing;YANG Weibin;HU Zhengkai;BAI Xin;LI Jing;LIN Yaqing;HUANG Junxiong(School of Optoelectronics and Communication Engineering,Xiamen University of Technology,Xiamen 361024,China;Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]厦门理工学院光电与通信工程学院,厦门361024 [2]厦门理工学院,福建省光电技术与器件重点实验室,厦门361024

出　　处：《人工晶体学报》2024年第12期2150-2159,共10页Journal of Synthetic Crystals

基　　金：福建省自然科学基金(2020J01297);厦门理工学院研究生科技创新计划(YKJCX2023083,YKJCX2023072)。

摘　　要：本文采用高温固相法合成新型K5Gd(MoO_(4))_(4)∶xSm^(3+)(x=0~0.10)及K5Gd(MoO_(4))_(4)∶0.04Sm^(3+),yEu^(3+)(y=0.03~0.15)红色荧光粉,并通过X射线衍射仪(XRD)、荧光粉激发光谱,以及热猝灭分析系统、稳态-瞬态光谱仪等对荧光粉的光致激发光谱及荧光发射光谱、荧光猝灭性能等进行分析。研究表明:掺入Eu^(3+),Sm^(3+)后的K_(5)Gd(MoO_(4))_(4)样品不含杂质相,且晶体的结构没有发生改变。在405 nm紫外光的激发下,K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+)和K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),0.12Eu^(3+)可以发射出色坐标为(0.6088,0.3904)和(0.6373,0.3592)的橙红光。在K5Gd(MoO_(4))_(4)∶xSm^(3+)(x=0~0.10)荧光粉样品中,随着Sm^(3+)掺杂浓度的增加,荧光粉的发光强度先增强后减弱,最佳的掺杂浓度为x=0.04。在K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),yEu^(3+)(y=0.03~0.15)荧光粉样品中,Eu^(3+)的发光强度随着掺杂浓度的增加呈先增加后减弱的趋势,且在y=0.12处发生浓度猝灭。当温度达到373 K时,K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+)荧光粉样品的发光强度是293 K时的94.69%,K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),0.12Eu^(3+)荧光粉样品的荧光强度是293 K时的76.3%,表明两种荧光粉样品都具有较好的热稳定性。色坐标图表明随着Eu^(3+)掺杂量的提高,色坐标从橙红色区域向纯红色区域发生微量移动。由此可见,K_(5)Gd(MoO_(4))_(4)∶xSm^(3+)和K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),yEu^(3+)荧光粉样品都具有作为红色荧光粉应用于白光LED的潜力。A series of K_(5)Gd(MoO_(4))_(4)∶xSm^(3+)(x=0~0.10)and K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),yEu^(3+)(y=0.03~0.15)red phosphors were synthesized by high-temperature solid-phase method in this paper.The photoluminescence spectra,fluorescence emission spectra,and fluorescence quenching performance of the phosphor were analyzed by X-ray diffraction(XRD),fluorescence excitation spectra,thermal quenching analysis system,and steady-state transient spectrometer.Results show that the samples synthesized by doping Eu^(3+)and Sm^(3+)into K_(5)Gd(MoO_(4))_(4) don’t contain impurity phases,and the crystal structure remains unchanged.Under the excitation of 405 nm ultraviolet light,K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+)and K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),0.12Eu^(3+)can emit excellent red light with the CIE coordinates of(0.6088,0.3904)and(0.6373,0.3592).In the K_(5)Gd(MoO_(4))_(4)∶xSm^(3+)(x=0~0.10)samples,as the Sm^(3+)doping concentration increases,the luminescence intensity of the phosphor first increases and then decreases,the optimal doping concentration is x=0.04.In the K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),yEu^(3+)(y=0.03~0.15)samples,the luminescence intensity of Eu^(3+)first increases and then decreases with increasing Eu^(3+)doping concentration,and concentration quenching occur at y=0.12.When the temperature reaches 373 K,the fluorescence intensity of the K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+)phosphor sample is 94.69% of that at 293 K,while the fluorescence intensity of the K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),0.12Eu^(3+)phosphor sample is 76.3% of that at 293 K,indicating their good thermal stability.The color coordinate graph shows that,doping of Eu^(3+)leads to the color coordinate shifts slightly from the orange red region to the pure red region.Both K_(5)Gd(MoO_(4))_(4)∶xSm^(3+)and K_(5)Gd(MoO_(4))_(4)∶0.04Sm^(3+),yEu^(3+)phosphor samples have the potential to be used as red phosphors for white light LED.

关 键 词：K_(5)Gd(MoO_(4))_(4)∶xSm^(3+) yEu^(3+) 高温固相法 红色荧光粉 荧光猝灭 色坐标 

分 类 号：TQ422[化学工程] TN312.8[电子电信—物理电子学]