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YF3:RE3+ (RE = Dy, Tb, Eu) Sub-microstructures: Controllable Morphology, Tunable Multicolor, and Thermal Properties
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-10-04 00:00:00 , DOI: 10.1021/acs.jpcc.7b07879
Hongxia Guan 1 , Ye Sheng 1 , Yanhua Song 1 , Chengyi Xu 1 , Xiuqing Zhou 1 , Keyan Zheng 1 , Zhan Shi 1 , Haifeng Zou 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-10-04 00:00:00 , DOI: 10.1021/acs.jpcc.7b07879
Hongxia Guan 1 , Ye Sheng 1 , Yanhua Song 1 , Chengyi Xu 1 , Xiuqing Zhou 1 , Keyan Zheng 1 , Zhan Shi 1 , Haifeng Zou 1
Affiliation
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A series of emission-tunable YF3:RE3+ (RE = Dy, Tb, Eu) phosphors were first synthesized by a glutamic acid-assisted one-step hydrothermal process. The structure and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results revealed that the samples were YF3 and Na(Y1.5Na0.5)F6 and the size and shape of the products could be tuned just by adjusting the pH values of the initial reaction solutions or by adjusting the RE3+/NaF ratio or RE3+/NaBF4 ratio. The morphologies for the products include bundlelike microstructures, fantail-like shape, microspindles, irregular bulk, walnutlike shape, irregular ellipsoidal microrods, the asymmetric hexagonal-prismatic tubular structures and irregular microrods and irregular nanoparticles and microsphere. Furthermore, the photoluminescence properties of YF3:Dy3+,Tb3+ and YF3:Tb3+,Eu3+ were investigated in detail. Blue and yellow emissions corresponding to the 4F9/2 → 6H15/2 (475 nm), 4F9/2 → 6H13/2 (570 nm) transition of Dy3+; blue and green emissions corresponding to the 5D4 → 7F6 (488 nm), 5D4 → 7F5 (542 nm) transition of Tb3+; and red emissions corresponding to the 5D0 → 7F1 (591 nm), 5D0 → 7F2 (614 nm), and 5D0 → 7F4 (698 nm) transition of Eu3+ can be observed in YF3 host under 365 nm near-ultraviolet radiation. The energy transfer process from Dy3+ to Tb3+ and from Tb3+ to Eu3+ was demonstrated to be resonant type via a quadrupole–quadrupole mechanism. Additionally, when codoping Tb3+ with Dy3+ or Eu3+ or tridoping Dy3+, Tb3+, and Eu3+ ions in the single component, colorful emitting can be obtained, giving abundant blue, green, yellow, orange, and especially white light emission. The temperature-dependent photoluminescence for as-prepared phosphors has been investigated in detail. Importantly, it is found that the fluorescent intensity ratio of YF3:5%Dy3+,2%Tb3+,2%Eu3+ displays a linear correlation with temperature in the wide range of 298–398 K with a high sensitivity of 0.24% K–1, indicating that it could be a good candidate for ratiometric optical thermometry. All these properties indicate that the developed phosphor may potentially be used as single-component multicolor-emitting phosphors.
中文翻译：
YF 3：RE 3+（RE = Dy，Tb，Eu）亚微观结构：可控制的形态，可调谐的多色和热性质
首先通过谷氨酸辅助一步水热法合成了一系列发射可调的YF 3：RE 3+（RE = Dy，Tb，Eu）荧光粉。通过X射线衍射（XRD）和扫描电子显微镜（SEM）对结构和形态进行表征。结果表明，样品为YF 3和Na（Y 1.5 Na 0.5）F 6，仅通过调节初始反应溶液的pH值或通过调节RE 3+ / NaF即可调节产物的大小和形状。比例或RE 3+ / NaBF 4比率。产品的形态包括束状微结构，扇尾状，微纺锤形，不规则块状，胡桃形，不规则椭圆形微棒，不对称六角棱柱形管状结构，不规则微棒，不规则纳米颗粒和微球。此外，详细研究了YF 3：Dy 3+，Tb 3+和YF 3：Tb 3+，Eu 3+的光致发光特性。蓝色和黄色的排放对应于4 ˚F 9/2 → 6 ħ 15/2（475纳米），4 ˚F 9/2 → 6 ħDy 3+的13/2（570 nm）跃迁; 蓝色和绿色发射分别对应于Tb 3+的5 D 4 → 7 F 6（488 nm），5 D 4 → 7 F 5（542 nm）跃迁；和红色发射对应于Eu的5 D 0 → 7 F 1（591 nm），5 D 0 → 7 F 2（614 nm）和5 D 0 → 7 F 4（698 nm）跃迁在365 nm近紫外辐射下的YF 3宿主中可以观察到3+。通过四极-四极机理证明了从Dy 3+到Tb 3+以及从Tb 3+到Eu 3+的能量转移过程是共振型的。此外，在将Tb 3+与Dy 3+或Eu 3+共掺杂或三掺杂Dy 3+，Tb 3+和Eu 3+时，单一组分中的离子，可以获得五颜六色的发射，从而发出大量的蓝色，绿色，黄色，橙色，尤其是白光。已经详细研究了制备的磷光体的温度依赖性光致发光。重要的是，发现YF 3的荧光强度比：5％Dy 3+，2％Tb 3+，2％Eu 3+在298-398 K的宽范围内显示出与温度的线性相关性，并且灵敏度很高。 K = 0.24％K -1，表明它可能是比率光学测温的理想选择。所有这些性质表明，所开发的磷光体可以潜在地用作单组分多色发射磷光体。
更新日期：2017-10-04
中文翻译：
YF 3：RE 3+（RE = Dy，Tb，Eu）亚微观结构：可控制的形态，可调谐的多色和热性质
首先通过谷氨酸辅助一步水热法合成了一系列发射可调的YF 3：RE 3+（RE = Dy，Tb，Eu）荧光粉。通过X射线衍射（XRD）和扫描电子显微镜（SEM）对结构和形态进行表征。结果表明，样品为YF 3和Na（Y 1.5 Na 0.5）F 6，仅通过调节初始反应溶液的pH值或通过调节RE 3+ / NaF即可调节产物的大小和形状。比例或RE 3+ / NaBF 4比率。产品的形态包括束状微结构，扇尾状，微纺锤形，不规则块状，胡桃形，不规则椭圆形微棒，不对称六角棱柱形管状结构，不规则微棒，不规则纳米颗粒和微球。此外，详细研究了YF 3：Dy 3+，Tb 3+和YF 3：Tb 3+，Eu 3+的光致发光特性。蓝色和黄色的排放对应于4 ˚F 9/2 → 6 ħ 15/2（475纳米），4 ˚F 9/2 → 6 ħDy 3+的13/2（570 nm）跃迁; 蓝色和绿色发射分别对应于Tb 3+的5 D 4 → 7 F 6（488 nm），5 D 4 → 7 F 5（542 nm）跃迁；和红色发射对应于Eu的5 D 0 → 7 F 1（591 nm），5 D 0 → 7 F 2（614 nm）和5 D 0 → 7 F 4（698 nm）跃迁在365 nm近紫外辐射下的YF 3宿主中可以观察到3+。通过四极-四极机理证明了从Dy 3+到Tb 3+以及从Tb 3+到Eu 3+的能量转移过程是共振型的。此外，在将Tb 3+与Dy 3+或Eu 3+共掺杂或三掺杂Dy 3+，Tb 3+和Eu 3+时，单一组分中的离子，可以获得五颜六色的发射，从而发出大量的蓝色，绿色，黄色，橙色，尤其是白光。已经详细研究了制备的磷光体的温度依赖性光致发光。重要的是，发现YF 3的荧光强度比：5％Dy 3+，2％Tb 3+，2％Eu 3+在298-398 K的宽范围内显示出与温度的线性相关性，并且灵敏度很高。 K = 0.24％K -1，表明它可能是比率光学测温的理想选择。所有这些性质表明，所开发的磷光体可以潜在地用作单组分多色发射磷光体。
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