Propriedade fotoluminescente da ZrO2: Tb+3, Eu+3, Tm+3 obtida pelo método de polimerização de complexos

Recent studies are investigating a new class of inorganic materials which arise as a promising option for high performance applications in the field of photoluminescence. Highlight for rare earth (TR +3 ) doped, which have a high luminous efficiency, long decay time and being able to emit radiation in the visible range, specific to each element. In this study, we synthesized ZrO2: Tb +3 , Eu +3 , Tm +3 nanoparticles complex polymerization method (CPM). We investigated the influences caused by the heat treatment temperature and the content of dopants in zirconia photoluminescent behavior. The particles were calcined at temperature of 400, 500 and 600 ° C for two hours and ranged in concentration of dopants 1, 2, 4 and 8 mol% TR +3 . The samples were characterized by thermal analysis, X-ray diffraction, photoluminescence of measurements and uv-visible of spectroscopies. The results of X-ray diffraction confirmed the formation of the tetragonal and cubic phases in accordance with the content of dopants. The photoluminescence spectra show emission in the region corresponding simultaneous to blue (450 nm), green (550 nm) and red (615 nm). According to the results, ZrO2 particles co-doped with rare earth ions is a promising material white emission with a potential application in the field of photoluminescence

M_2RSbO_6:R~(3+)复合氧化物的合成组成结构和性能的研究(M = Ba、Sr、Ca, R = La、Gd、Y、Bi, R' = Sm、Eu、Dy、Ho、Er、Tm)

对于稀土与非稀土所组成的二元复合氧化物的研究国外已有较多的报导。但是，对于稀土和锑的复合氧化物只是近年来才开始有些研究工作。含锑与稀土的多元复合氧化物的报导就更少。本文在我们实验室张静筠等人三元复合氧化物研究的基础上，开展Mo—Sb_2O_5—R_2O_3—R'_2O_3—Bi_2O_3多元体系的研究工作，这对于我国丰产元素稀土和锑的应用以及利用Bi~(3+)的激活与敏化将是有益的。本文按Thornton等人的方法合成了Ba_2BiSbO_6，Ba_2GdSbO_6，按EγΦECEHKO等人的方法合成了M_2RSbO_6 (M = Ba、Sr、Ca, R = La Y)。并以M_2RSbO_6为基质，掺Sm~(3+)、Eu~(3+)、Dy~(3+)、Ho~(3+)、Er~(3+)、Tm~(3+)和Bi~(3+)，研究它们的化学组成，晶体结构与发光性能的关系及规律，Bi~(3+)的荧光和敏作用。同时研究了它们的磁学和热学性能。化学组成的分析结果表明，计算的含量与实验测得的含量符合较好，说明化学反应是按化学计量比进行的。通过X-射线粉沫物相分析和晶胞参数的理论计算确定M_2RSbO_6(M = Ba、Sr、R = La、Y、Gd、Bi)复合氧化物是属于立方钙钛太型化合物。空间群为Fm3m，点群为Oh。用计算机计算了Ca_2YSbO_6的晶胞参数并结合荧光光谱分析确定它属于畸变的单斜钙钛矿，空间群为P_(21)。用磁天平测量了样品M_2RSbO_6 (M = Ba、Sr、Ca; R = Gd、Y、Bi)的磁化率。除Ba_2GdSbO_6是顺磁性物质外共余的都是反磁性的物质。按所用原料Sb_2O_5计算的磁化率与测量值符合较好，表明在所研究的M_2RSbO_6化合物中锑是正五价的。用热重热差分析仪测量了样品在反应中的热性能，观察到在化合物形成的过程中所用原料Sb_2O_3大约在520 ℃左右氧化变为Sb_2O_5。除所用原料碳酸盐分解外没有挥发性的物质，这就进一步证明化学组成分析和磁化率测量的结果是正确的。光学测量的结果表明，所有的磷光体随着激活离子浓度的不同其光谱都发生规律性的变化。对于不同Eu~(3+)浓度的Ba_2YSbO_6:Eu~(3+)和Br_2YSbO_6:Eu~(3+), Bi~(3+)体系用254nm激发时均能观察到Eu~(3+)于595nm的尖峰发射。用基质和Bi~(3+)的激发峰325nm激发时，明显地看到敏化剂Bi~(3+)到Eu~(3+)的能量传递，使Eu~(3+)于595nm的发射大大增强，我们认为Bi~(3+)对Eu~(3+)的敏化作用是由于基质和Bi~(3+)的~1S。→ 3P_1的跃迁吸收了激发的能量，然后无辐射弛豫到Eu~(3+)的激发态~5D_0，产生~5D_0 → 7F_1的磁偶极跃迁。对于不同Eu~(3+)浓度的Sr_2YSbO_6:Eu~(3+)和Sr_2YSbO_6:Eu~(3+), Bi~(3+)体系用245nm激发时均能观察到Eu~(3+)于595nm的尖峰发射。用基质和Bi~(3+)的激发峰335nm激发时，观察到基质和Bi~(3+)对Eu~(3+)具有某种能量传递。敏化作用机理与上述的Ba_2YSbO_6:Eu~(3+)和Ba_2YSbO_6:Eu~(3+), Bi~(3+)体系相同。对于不同Eu~(3+)浓度的Ca_2YSbO_6:Eu~(3+)和Ca_2YSbO_6:Eu~(3+), Bi~(3+)体系用396nm激发时，均能观察到Eu~(3+)于613nm很强的尖峰发射。用基质和Bi~(3+)的激发峰313nm激发时，见到Bi~(3+)和基质对Eu~(3+)具有某种能量传递，这种敏化作用主要是由于基质和Bi~(3+)的3P_1 → ~1S_0的400nm的宽带发射和Eu~(3+)的~7F_0 → ~5L_6的396nm的吸收相匹配产生~5L_6→~5D_0→~7F_2的跃迁。通过对激发光谱和荧光光谱的分析给出了Ca_2Y_(0.96)Eu_(0.04)SbO_6的能级图，从实验上可见，Eu~(3+)的发光强烈地依赖于钙钛矿的结构，当Eu~(3+)在空间群为Fm3m 的Ba_2YSbO_6和Sr_2YSbO_6中处于Oh点对称性时，主要是~5D_0 → ~7F_1的磁偶极跃迁。当Eu~(3+)在空间群为P_(21)的单斜钙钛矿中时，主要是~5D_0 → ~7F_2的电偶极跃迁。对于不同掺杂浓度M_2YSbO_6:R~(13+)(M = Ba、Ca; R' = Sm、Dy、Ho、Er、Tm)体系，通过激发和荧光光谱的研究，合理地确定了谱项。发现基质对Sm~(3+)、Dy~(3+)、Ho~(3+)具有敏化作用。对不同Bi~(3+)浓度的Ca_2YSbO_6:Bi~(3+)，由激发和荧光光谱可见Bi~(3+)具有二个激发带，第一激发带位于240nm处相当于~1S_0 → ~1P_1的跃迁，第二激发带位于315nm处相当于~1S_0 → ~3P_1的跃迁。有一个很强的兰紫色发射位于400nm处相当于~3P_1 →~1S_0的跃迁。

Ce~(3+)在稀土取代的卤磷酸盐中的发光与能量传递的研究

本工作用固相反方法、以炭保护或在N_2-H_2还原气氛中，两次灼烧，合成了一系列烯土取代的卤磷酸盐发光体，其反应是M_2~ICO_3 + M_3~(II)(PO_4)_2 + M_2~(III)O_3 + (NH_4)_2HPO_4 + M~(II)F_2 → M_x~IM_(10-2x)~(II)M_x~(III)(PO_4)_6F_2 + NH_3 + H_2O式中：M~I = Li~+, Na~+, K~+; M~(II) = Ca~(2+), Sr~(2+); M~(III) = Y~(3+), La~(3+), Gd~(3+); X = 0.5, 1, 2, 3。通过X－射线分析法和以Eu~(3+)作为荧光离子探针方法确定了样品的物相和晶体结构，表明它与M_(10)~(II)(PO_4)_6F_2同属六方晶系(Pb_3/m)。并用图解外推法求得样品的晶胞参数a和c分别为9.41和6.89 A。在研究了M~I, M~(II)和M~(III)为不同阳离子，X为不同值时，取代物的物相和结构变化以及对Ce~(3+)发光和能量传递影响规律的基础上，以Na_2Ca_6La_2(PO_4)_6F_2为基本体系比较详细地研究了Ce~(3+)的发光，Ce~(3+)-Mn~(2+), Ce~(3+)-Re~(3+) (Re~(3+) = Pr~(3+)、Nd~(3+)、Sm~(3+)、Tb~(3+)、Dy~(3+)、Tm~(3+)、Ho~(3+)、Er~(3+))以及Ce~(3+)-Mn~(2+)-Re~(3+) (Re~(3+) = Dy~(3+), Nd~(3+))的能量传递。实验发现，Na_2Ca_6La_2(PO_4)_6F_2:Ce~(3+)是较强的紫外光发射体，发射谱带是由338和358nm两个宽带峰组成的，相应于~2D-~2F_(5/2)和~2D-~2F_(1/2)跃迁。发射强度和~2D-~2F_(6/2)，~2D-~2F_(7/2)两种辐射跃迁几率相对大小与温度，Ce~(3+)的浓度有关；F~-含量对发射强度也有强烈的影响。我们认为，浓度和温度的影响是由于Ce~(3+)-Ce~(3+)的能量迁移作用。实验发现，Ce~(3+)能有效地敏化Mn~(2+)的发光，得到高效的黄色荧光发射体。Ce~(3+)对Re~(3+)的作用可以分为三类：A）. Ce~(3+)-Sm~(3+)、Tb~(3+)、Dy~(3+)、Tm~(3+)；B）．Ce~(3+)-Nd~(3+)，Pr~(3+)；C）. Ce~(3+)-Ho~(3+), Er~(3+)。在A，B类型中，Ce~(3+)能有效地敏化这些稀土离子，但能量传递效率(η_T)_A > (η_T)_B。在Ce~(3+)-Ho~(3+)、Ce~(3+)-Er~(3+)类型中，Ho~(3+)、Er~(3+)不产生可见辐射，Ce~(3+)的发射强度也显著降低。在Ce~(3+)-Mn~(2+)-Re~(3+)三元中心体系中，Ce~(3+)的能量可直接传递给Mn~(2+)和Re~(3+)中心，还可通过Ce~(3+)-Mn~(2+)-Re~(3+)的途径传递。通过研究中心离子的浓度效应，温度效应、测定激发光谱、荧光光谱、荧光衰减曲线的荧光寿命，能够证实：在Ce~(3+)-Mn~(2+)、Ce~(3+)-Re~(3+)、Ce~(3+)-Mn~(2+)-Re~(3+)的能量传递属于无辐射共振传递相互作用类型。符合M. Yokata等人提出的偶极－偶极相互作用扩散限制传递历程。我们还利用Ce~(3+)、Ce~(3+)-Mn~(2+)、Ce~(3+)-Re、Ce~(3+)-Mn~(2+))-Re~(3+)激活体系中Ce~(3+)的发射强度和荧光寿命等数据计算了Ce~(3+)的能量传递效率。发现两种结果相差较大，为了准确地表达Ce~(3+)的敏化效果，在分析上了产生这种误差的原因后，提出了两种传递效率表示式(η_f, η_R)。

Tm and Tm-Tb-doped germanate glasses for S-band amplifiers

The mechanism involved in the Tm(3+)((3)F(4)) -> Tb(3+)((7)F(0,1,2)) energy transfer as a function of the Tb concentration was investigated in Tm:Tb-doped germanate (GLKZ) glass. The experimental transfer rate was determined from the best fit of the (3)F(4) luminescence decay due to the Tm -> Tb energy transfer using the Burshtein model. The result showed that the 1700 nm emission from (3)F(4) can be completely quenched by 0.8 mol% of Tb(3+). As a consequence, the (7)F(3) state of Tb(3+) interacts with the (3)H(4) upper excited state of TM(3+) slighting decreasing its population. The effective amplification coefficient beta(cm(-1)) that depends on the population density difference Delta n = n((3)H(4))-n((3)F(4)) involved in the optical transition of Tm(3+) (S-band) was calculated by solving the rate equations of the system for continuous pumping with laser at 792 nm, using the Runge-Kutta numerical method including terms of fourth order. The population density inversion An as a function of Tb(3+) concentration was calculated by computational simulation for three pumping intensities, 0.2, 2.2 and 4.4 kWcm(-2). These calculations were performed using the experimental Tm -> Tb transfer rates and the optical constants of the Tm (0.1 mol%) system. It was demonstrated that 0.2 mol% of Tb(3+) propitiates best population density inversion of Tin(3+) maximizing the amplification coefficient of Tm-doped (0.1 mol%) GLKZ glass when operating as laser intensity amplification at 1.47 mu m. (C) 2007 Elsevier B.V. All rights reserved.

Forced expression of tropomyosin 2 or 3 in v-Ki-ras-transformed fibroblasts results in distinct phenotypic effects.

Transformation of cells in tissue culture results in a variety of cellular changes including alterations in cell growth, adhesiveness, motility, morphology, and organization of the cytoskeleton. Morphological and cytoskeletal changes are perhaps the most readily apparent features of transformed cells. Although a number of studies have documented a decrease in the expression of specific tropomyosin (TM) isoforms in transformed cells, it remains to be determined if the suppression of TM synthesis is essential in the establishment and maintenance of the transformed pheno-type. To address the roles of different TM isoforms in transformed cells we have examined the effects of expressing specific TM isoforms in transformed cells using a Kirsten virus-transformed cell line (ATCC NRK1569) as a model system. In contrast to normal fibroblasts, the NRK 1569 cells contain reduced levels of TM-1 and undetectable levels of TM-2 and TM-3. These cells have a rounded morphology and are devoid of stress fibers. Employing expression plasmids for TM-2 and TM-3, stable cell lines were established from the NRK 1569 cells that express these isoforms individually. We demonstrate that expression of TM-2 or TM-3 leads to increased cell spreading accompanied by the formation of identifiable microfilament bundles, as well as significant restoration of well-defined vinculin-containing focal adhesion plaques, although expression of each isoform exhibited distinct properties. In addition, cells expressing TM-2, but not TM-3, exhibited contact-inhibited cell growth and a requirement for serum.

Operator's manual : compressor unit, reciprocating, power-driven, flamethrower, 3-1/2 cfm, AN-M4 (Walter Kidde), NSN 4310-00-592-8560, AN-M4B (Stewart-Warner), NSN 4310-00-848-6075, AN-M4C (Stewart-Warner), NSN 4310-00-078-5431, AN-M4D (Walter Kidde), NSN 4310-00-181-5054.

"November 1976."

三维立体显示用稀土掺杂氧卤碲酸盐玻璃

制备了一种新的Er^3+／Tm^3+/Yb^3+共掺氧卤碲酸盐玻璃。研究了基质玻璃的热稳定性能、Raman光谱和上转换发光。发现：氧卤碲酸盐玻璃具有好的热稳定性能和低的声子能量，在980nmLD激发下，可同时观察到明显的蓝色(476nm)、绿色(530nm和545nm)和红色(656nm)上转换发光。上转换蓝光(476nm)是由于Tm^3+离子1^G4→3^3H6跃迁，上转换的绿光(530nm和545nm)是由于Er^3+离子2^H11/2→4^I15／2和4^S3/2→4^I15/2跃迁，上转换红光(6

掺铥氟磷玻璃的结构、热学性质和光谱性质

制备了不同Al（PO3）3含量的掺铥系列氟磷玻璃，研究了其结构、热稳定性和光谱性质。随着Al（PO3）3含量的增加，该系列玻璃的密度降低，折射率增加，差热分析表明，转变温度、析晶起始温度、析晶峰温度和熔化温度增加。Al（PO3）3摩尔浓度在7％～9％时析晶稳定性最佳。采用归一化的拉曼光谱分析了材料的结构和声子状况，对于该系列氟磷玻璃，Al（PO3）3含量的增加不会影响声子能量，但使声子密度增大。测试了样品的吸收光谱，Tm^3＋的^3H6→^3F4在第三通信窗口的L波段有明显吸收。与在其它玻璃基质中相比，T

Upconversion properties of Er3+, Yb3+ and Tm3+ codoped fluorophosphate glasses

Er3+, Yb3+ and Tm3+ codoped fluorophosphate glasses emitting blue, green and red upconversion luminescence at 970 nm laser diode excitation were studied. It was shown that Tm3+ behaves as the sensitizer to Er3+ for the green upconversion luminescence through the energy transfer process: Tm 3+:H-3(4) + Er3+:I-4(15/2) -> Er3+:I-4(9/2) + Tm3+:H-3(6), and for the red upconversion luminescence through the energy transfer process: Tm3+:F-3(4) + Er3+:I-4(11/2) -> TM3+:H-3(6) + Er3+:4 F-9/2. Moreover, Er3+ acts as quenching center for the blue upconversion luminescence of TM3+. The sensitization of Tm3+ to Er3+ depends on the concentration of Yb3+. The intensity of blue, green and red emissions can be changed by adjusting the concentrations of the three kinds of rare earth ions. This research may provide useful information for the development of high color and spatial resolution devices and white light simulation. (C) 2006 Elsevier B.V. All rights reserved.

Blue upconversion Luminescence in Tm3+/Yb3+-Codoped New Oxyfluoride Tellurite Glass

The thermal stability, Raman spectrum and upconversion properties of Tm^(3+)/Yb^(3+) co-doped new oxyfluoride tellurite glass are investigated. The results show that Tm^(3+)/Yb^(3+) co-doped oxyfluoride tellurite glass possesses good thermal stability, lower phonon energy, and intense upconversion blue luminescence. Under 980-nm laser diode (LD) excitation, the intense blue (475 nm) emission and weak red (649 nm) emission corresponding to the 1G4 -> 3H6 and 1G4 -> 3F4 transitions of Tm^(3+) ions respectively, were simultaneously observed at room temperature. The possible upconversion mechanisms are evaluated. The intense blue upconversion luminescence of Tm^(3+)/Yb^(3+) co-doped oxyfluoride tellurite glass can be used as potential host material for the development of blue upconversion optical devices.

Upconversion luminescence of TM3+/Yb3+ codoped oxyfluoride glasses

Novel oxyfluoride glasses are developed with the composition of 30SiO(2)-15Al(2)O(3)-28PbF(2)-22CdF(2)-0.1TmF(3)-xYbF(3) -(4.9-x) AlF3(x = 0, 0.5, 1.0, 1.5, 2.0) in mol fraction. Furthermore, the upconversion luminescence characteristics under a 970nm excitation are investigated. Intense blue, red and bear infrared luminescences peaked at 453nm, 476nm, 647nm and 789nm, which correspond to the transitions of Tm3+: D-1(2) -> F-3(4), (1)G(4) -> H-3(6), (1)G(4) -> F-3(4), and H-3(4) -> H-3(6), respectively, are observed. Due to the sensitization of Yb3+ ions, all the upconversion luminescence intensities are enhanced considerably with Yb3+ concentration increasing. The upconversion mechanisms are discussed based on the energy matching rule and quadratic dependence on excitation power. The results indicate that the dominant mechanism is the excited state absorption for those upconversion emissions.

2μm波段激光薄膜的研制

概述了国内外关于～2μ波段发光的掺Tm^3＋，THo^3＋和Er^3＋等激光晶体镀膜的使用情况，结合我们实验室已有的工作基础，对其设计原理和制备工艺进行了详细分析，制备出了较高性能2．94μm的激光薄膜。

染料掺杂聚合物薄膜放大自发发射和受激发射的研究

随着有机／聚合物电致发光材料在有机发光二极管上的应用以及有机晶体管和有机太阳能电池的研制成功，有机／聚合物电致发光材料的优异的光电性能、低廉的生产成本、简单的加工工艺、宽广的选材范围和良好的机械性能等优点极大地吸引科学家们的研究兴趣，并开始了有机／聚合物发光薄膜的放大的自发发射和受激发射行为的研究。有机分子和聚合物的诸多如易得、廉价、结构多样、功能易调节、大的横截面积、高的荧光量子效率和低的自吸收等优点使其制成的激光器在未来光纤通讯领域中呈现了诱人的应用前景。新的有机激光材料不断涌现、器件结构不断推陈出新、新的激发原理不断提出并得到修正已经成为有机／聚合物固体激光研究领域的三大特点。本论文以研究有机材料的激光特性为目的，通过对有机染料DCJTB和三芳胺取代1，8-蔡酰亚胺齐聚物掺杂聚合物薄膜的放大的自发发射和受激发射特性的研究，探讨实现低闭值、高增益光泵浦有机聚合物激光的方法及影响器件性能的因素，阐明放大自发发射的工作机制，为进一步探讨电泵浦有机聚合物激光器提供材料体系和理论依据。1、研究了DCJTB掺杂聚合物薄膜的放大自发发射特性，分析了光泵浦条件下光谱窄化的放大自发发射机制，对ASE增益和损耗进行了讨论和数值拟合，并对增益方程进行了饱和修正。DCJTB：PS薄膜具有较低的闺值（0．16mJ·Pulse~(_1)·cm-2）、高的增益系数（40．72cm-1）、低的损耗值2．49cm一l和高的荧光量子效率（70．4％），其波导增益的波长分布呈明显的洛仑兹分布，增益饱和是均匀展宽的。与DCM比较发现，自由体积是决定材料性能的重要因素，大的自由体积有利于实现低闭值、高增益。我们的研究结果表明，DCJTB是非常好的激光介质材料。2、从ASE的发射波长、ASE闭值、增益和损耗四个技术指标出发，详细研究了激发光波长、聚合物基体、旋涂速度及基片等对DCJTB：PS薄膜放大自发发射（ASE）的影响，短的激发波长和合适的基体材料可以显著地降低闭值和提高增益，薄膜厚度和基片也对ASE性能有很大影响。利用琢lord镜面体系，研究了DCJTB染料掺杂相列向液晶体系的分布反馈激光特性，在电场作用下，可以有效地对TE、TM两种模式的输出强度进行调解。3、把电子传输／发光有机小分子材料Alq3掺杂到DCJTB和C545T掺杂聚合物薄膜，研究了它们的放大自发发射特性。通过在不同激发光波长激发下不同Alq3掺杂浓度对ASE性能影响的研究，发现掺杂Alq3显著地降低了闭值，增加了增益和减小了损耗。由于Alq3是一种良好的半导体有机发光材料，Alq3的引入对电泵浦有机聚合物激光器的研究具有重要的意义。4、研究了三种在4位氨基位置引入不同三芳胺功能基团的红光1，8-蔡酞亚胺齐聚物的放大自发发射特性，研究结果表明，三芳胺取代1，8蔡酞亚胺齐聚物具有低阂值、高增益和低损耗的特点，显示了较小的浓度淬灭效应，即使掺杂浓度高到60％仍可以观察到放大的自发发射现象，表明三芳胺取代1，8茶酞亚胺是一类非常有应用前景的有机半导体激光材料体系。

氟化物体系新型无机闪烁材料制备特性及若干基础问题研究

本文综述了无机闪烁材料研究的进展，着重了氟化物体系中几种新型无机闪烁材料的制备、性能及辐照损伤等特性。运用B－S法生长了BaF_2及BaF_2:Ce晶体，研究了其室温以上的TSL特性，发现BaF_2的TSL曲线是由381K和402K的双峰结构组成Ce的掺入使TSL强度降低，同时提高了其抗辐照性能。运用高温固相反应法合成了KMgF_3、KCaF_3、BaLiF_3微晶，用TSL和ESR研究了其辐照损伤及其恢复情况。纠正了文献中对KMgF_3热释峰归属的错误，发现在KMgF_3、KCaF_3中杂质Al~(3+)一方面引入新的缺陷而导致新的热释峰，另一方面抑制了F心的形成。在BaLiF_3中La~3、Yb~(3+)的掺入会抑制F心，同时使H心增强，观察到了大剂量（10~8Rad）辐照时BaLiF_3中FA心形成及其在加热和紫外光照射时向F心的转化。发现它们的X射线辐照损伤极易恢复，而γ射线辐照损伤则较难恢复。通过对ESR峰高与Eu掺杂浓度的研究，运用数学拟合法求得了Eu~(3+)掺入KMgF_3制备KMgF_3:Eu~(2+)的饱和掺杂浓度为0.29mol%。首次发现BaLiF_3:Eu~(2+)的PSL现象，并证明它是一种很有发展前途的新型X射线存贮材料。运用B－S法探索了KMgF_3、BaLiF_3、单晶生长工艺，用X射线四园衍射法发现La~(3+)、Tm~(3+)掺入KMgF_3时分另占据K~+、Mg~(2+)的格位，用SEM观察了浓H_2SO_4cf KMgF_3单晶的侵蚀形貌和BaLiF_3单晶生长中经常出现的包裹体。研究了LaF_3:Ce~(3+)的发光特性及其它三价稀土离子的共掺杂对Ce~(3+)发光特性的影响，发现其它三价稀土离子的共掺杂都会使Ce~(3+)的发光猝灭，并分别归结为能量传递和电荷转移。用B－S法生长了CeF_3单晶，但因原料纯度低，衰减常数和光子产额都比文献值要低，说明在闪烁晶体制备时，提高原料纯度是十分必要的。