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| 1 | 效应面优化模型获取Y_(4)GeO_(8)∶Bi^(3+),Eu^(3+)红色荧光粉掺杂浓度显示文摘使用更直接的方法(效应面优化模型)预测了Y_(4)GeO_(8)∶Bi^(3+),Eu^(3+)样品的最强红光发射。预测最佳样品掺杂的Bi^(3+)离子和Eu^(3+)离子浓度分别为31.03%和67.36%(摩尔分数)。制备最佳样品后对其光致发光性能进行了测试和表征。荧光粉Y_(4)GeO_(8)∶31.03%Bi^(3+),67.36%Eu^(3+)具有最强的红光发射,并且强度的实验值和理论值之间的差值很小。优化样品的色坐标为(0.6457,0.3490),计算出的色纯度为98%,内量子效率高达72.5%。本文提供了一种直接寻找发光最强的荧光粉最佳掺杂浓度的方法,可用于探索各种类型的共掺杂荧光粉。 | 徐淑君 陈静 陈礼元 ASHRAF Ghulam-Abbas 李慧军 郭海 | 2022 | 发光学报2022，43，5： | 2 |
| 2 | Er^(3+)掺杂Cs_(2)Sn_(0.9)Te_(0.1)Cl_(6)钙钛矿材料应用于测温的探究显示文摘利用溶剂热法制备了Er^(3+)掺杂的Cs_(2)Sn_(0.9)Te_(0.1)Cl_(6)钙钛矿晶体,利用SEM,XRD等手段对材料进行了形貌表征,并通过荧光光谱仪对材料的光学性能进行了表征。进一步利用变温荧光光谱探究了材料的比率荧光随着温度改变呈现的变化,将其作为测温探针,表征了该测温探针的比率荧光随着温度的变化、绝对灵敏度以及相对灵敏度随着温度的变化。发现Er^(3+)掺杂的Cs_(2)Sn_(0.9)Te_(0.1)Cl_(6)钙钛矿测温探针具有最佳绝对灵敏度0.000720 K^(-1)(250 K)和最佳相对灵敏度1.69%K^(-1)(200 K)。本文不仅提供了一种低温范围内有效的FIR测温探针,还拓展了零维钙钛矿材料在测温领域的应用。 | 张易艳 赵天宇 陈冠英 | 2023 | 中国稀土学报2023，41，3： | 0 |
| 3 | Bi^(3+)、Eu^(3+)共掺双钙钛矿Gd_(2)ZnTiO_(6)荧光粉制备及其温度传感性能显示文摘采用高温固相法制备了一系列具有双发射中心的Gd_(2(1-x-y))ZnTiO_(6)∶xBi^(3+),y Eu^(3+)荧光粉。采用X射线衍射、扫描电子显微镜、荧光光谱、寿命衰减曲线和变温发射光谱等方法,系统地研究了该材料的结构、发光性能和温度传感特性。在Gd_(2)ZnTiO_(6)∶Bi^(3+),Eu^(3+)荧光粉中,Bi^(3+)和Eu^(3+)离子占据了Gd^(3+)离子的位置。在紫外激发下,Eu^(3+)的激发光谱和Bi^(3+)的发射光谱存在光谱重叠,表明从Bi^(3+)到Eu^(3+)可能存在能量传递。通过荧光强度比技术探究了Bi^(3+)蓝光发射与Eu^(3+)红光发射的不同温度响应特性。在293~473 K温度范围内,测得Gd_(2)ZnTiO_(6)∶Bi^(3+),Eu^(3+)荧光粉的最大相对温度灵敏度为1.133%·K^(-1),最大绝对灵敏度为0.73%·K^(-1)。因此,Gd_(2)ZnTiO_(6)∶Bi^(3+),Eu^(3+)荧光粉是一种有潜力的非接触式光学测温材料。 | 温一诺 陈彦伶 付杰 林健华 周柳艳 李杰 韩明晓 陈书阳 邓德刚 陈亮 | 2023 | 发光学报2023，44，4： | 0 |
| 4 | Effect of Eu^(3+),Bi^(3+),and Li^(+) doping on luminescent property of GdNbO_(4)显示文摘We investigated the emission properties of Eu^(3+)-doped GdNbO_(4)-based oxide phosphors,aiming at improving the Eu^(3+)emission by codoping of Bi^(3+)and Li^(+).Eu^(3+)singly doped,Eu^(3+)and Bi^(3+)doubly doped,and Eu^(3+),Bi^(3+),and Li^(+)triply doped GdNbO_(4)were prepared using a high-temperature solid-state reaction method.The red-orange emissions from Eu^(3+)in the singly doped samples are significantly improved by the codoping of Bi^(3+),mainly due to the energy transfer from Bi^(3+)to Eu^(3+).The additional codoping of Li^(+)is found to increase the Eu^(3+)emission significantly.This improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu^(3+)in GdNbO_(4)does not change significantly with the codoping of Bi^(3+)and Li^(+).Our results indicate that Li^(+)doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO_(4)phosphors. | S.W.Wi Y.S.Lee | 2024 | Journal of Rare Earths2024，42，1： | 0 |
| 5 | Effect of Y:Zn ratio on microstructure and emission of Er^(3+)/Yb^(3+) codoped Y_(2)O_(3)-ZnO ceramic phosphors显示文摘In this study,Er^(3+)/Yb^(3+)codoped Y_(2)O_(3)-ZnO ceramic phosphors were prepared by sol-gel method.The samples had two emission bands,namely,green(535 nm) and red(660 nm),which are attributed to Er^(3+):^(2)H_(11/2)(^(4)S_(3/2))→^(4)I_(15/2)and Er^(3+):^(4)F_(9/2)→^(4)I_(15/2)radiative transitions,respectively.The samples exhibited green-and red-emission intensity enhancement by 1.728 and 2.286 times that of the pure Y2O3host,respectively and by 514.468 and 214.341 times that of the pure ZnO host.The emission intensities are first enhanced by lattice expansion.With the change of Y:Zn ratio,the high surface energy is converted into low crystal surface resulting in the change of asymmetry crystal field for matrix.When the intensity of the asymmetric crystal field reaches maximum,both emissions are further boosted.When the high surface energy transforms into crystal surface energy,the microstructure changes into a compact mesoporous structure.Consequently,the chemical stability of the samples improves significantly,and the final emission band of the three samples with mesoporous structures is continuously red. | Boxu Xu Chao Song Jie Song Rui Huang Shaomin Lin Zhenxu Lin Yi Zhang Dejian Hou Jun Song | 2023 | Journal of Rare Earths2023，41，12： | 0 |
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