1. 河北大学 物理科学与技术学院,河北 保定,071002
2. 河北大学 工商学院,河北 保定,071002
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王志军, 刘海燕, 张 坤, 等. LiCaBO3 : Sm3+材料的发光特性[J]. 发光学报, 2010,31(1):49-53.
WANG Zhi-jun, LIU Hai-yan, ZHANG Kun, et al. Luminescence Characteristics of LiCaBO3 : Sm3+ Phosphor[J]. Chinese Journal of Luminescence, 2010,31(1):49-53.
以CaCO,3,(99.9%)、Li,2,CO,3,(99.9%)、Na,2,CO,3,(99.9%) K,2,CO,3,(99.9%)、H,3,BO,3,(99.9%)、Sm,2,O,3,(99.9%)为原料,按所设计的化学计量比称取以上原料,在玛瑙研钵中混合均匀并充分研磨,装入刚玉坩埚,采用固相法制备LiCaBO,3, ∶ Sm,3+,材料;通过美国XRD6000型X射线衍射仪和日本岛津RF-540荧光分光光度计对材料的性能进行表征,所有测量均在室温条件下进行。LiCaBO,3, : Sm,3+,材料的发射光谱由三个橙红色发射峰组成,主峰位于561,602,651 nm,分别对应Sm,3+,的,4,G,5/2,→,6,H,5/2,、,4,G,5/2,→,6,H,7/2, 和,4,G,5/2,→,6,H,9/2,跃迁;监测602 nm发射峰,得到其激发光谱由320~420 nm的宽激发带组成。由激发和发射光谱看出,LiCaBO,3, ∶ Sm,3+,能够有效地被紫外LED芯片激发,发射红色光。研究了Sm,3+,浓度(,x,)对LiCa,1-,x,BO,3, : ,x,Sm,3+,材料发射强度的影响,结果表明:随Sm,3+,浓度的增大,发射强度先增强后减弱,Sm,3+,掺杂摩尔分数为3%时,发射强度最大,依据Dexter 理论,计算得出其浓度猝灭机理为电偶极-偶极相互作用。掺入电荷补偿剂Li,+,、Na,+,和K,+,均提高了LiCaBO,3, : Sm,3+,材料的发射强度。
LiCaBO,3, : Sm,3+, phosphor was synthesized by solid state reaction and its luminescent properties were studied. The emission spectrum consists of three major orange-red emission bands at 561, 602 and 651 nm, which correspond to the ,4,G,5/2,→,6,H,5/2,4,G,5/2,→,6,H,7/2, and ,4,G,5/2,→,6,H,9/2, typical transitions of Sm,3+, respectively. The excitation spectrum for the strongest emission (602 nm) extends in 320~420 nm, which indicated that this phosphor can be effectively excited by near-ultraviolet light-emitting diodes. The influences of Sm,3+, concentration (,x,) on the emission intensity of LiCa,1-,x,BO,3, : ,x,Sm,3+, phosphors were also investigated. The results showed that the intensity increases with increasing Sm,3+, concentration, then decreases, and reaches the maximal value at 3% Sm,3+,. And the concentration self-quenching mechanism is the d-d interaction according to Dexter theory. The emission intensity of LiCaBO,3, : Sm,3+, can be enhanced by doping charge compensator Li,+, Na,+, K,+,.
发光硼酸盐三价钐离子
luminescenceborateSm3+
. Kim J S, Jeon P E, Choi J C, et al. Warm-white-light emitting diode utilizing a single-phase full-color Ba3MgSi2O8 : Eu2+,Mn2+ phosphor [J]. Appl. Phys. Lett., 2004, 84 (15):2931-2933.
. Park J K, Lim M A, Kim C H, et al. White light-emitting diodes of GaN-based Sr2SiO4 : Eu and the luminescent properties [J]. Appl. Phys. Lett., 2003, 82 (5):683-685.
. Yang Zhiping, Wang Shaoli, Yang Guangwei, et al. Preparation and luminescent properties of green NaCaPO4 : Tb3+ phosphor [J]. Chin. J. Lumin. (发光学报), 2008, 29 (1):71-74 (in Chinese).
. Sun Xiaoyuan, Zhang Jiahua, Zhang Xia, et al. A single white phosphor suitable for near ultraviolet excitation applied to new generation white LED lighting [J]. Chin. J. Lumin. (发光学报), 2005, 26 (3):404-406 (in Chinese).
. Li Xu, Yang Yong, Yang Zhiping, et al. Fabrication and properties of Eu3+ doped La2Mo2O9 red phosphor [J]. Chin. J. Lumin. (发光学报), 2008, 29 (1):93-96 (in Chinese).
. Yang Yi, Jin Shangzhong, Shen Changyu, et al. Spectral properties of alkaline earth composite silicate phosphors for white LED [J]. Chin. J. Lumin. (发光学报), 2008, 29 (5):800-804 (in Chinese).
. Li Xuzheng, Wang Dajian, Gu Tiecheng, et al. Sol spray-microwave cancining and luminescent properties of Ba2MgSi2O8 hosted phosphors for white light emitting diodes [J]. Chin. J. Lumin. (发光学报), 2008, 29 (6):989-995 (in Chinese).
. Park J K, Lim M A, Choi K J, et al. Luminescence characteristics of yellow emitting Ba3SiO5 : Eu2+ phosphor [J]. J. Mater. Sci., 2005, 40 (8):2069-2071.
. Lim M A, Park J K, Kim C H, et al. Luminescence characteristics of green light emitting Ba2SiO4 : Eu2+ phosphor [J]. J. Mater. Sci. Lett., 2003, 22 (19):1351-1353.
. Yang Zhiping, Zhao Fangliang, Li Xiaoning, et al. Luminescent properties of Sr3B2O6 : Tb3+ , Li+ green phosphor [J]. Chin. J. Lumin. (发光学报), 2008, 29 (6):941-944 (in English).
. Wu L, Chen X L, Li H, et al. Structure determination of a new compound LiCaBO3 [J]. J. Solid State Chemistry, 2004, 177 (4-5):1111-1116.
. Jiang L H, Zhang Y L, Li C Y, et al. Thermoluminescence characteristics of rare-earth-doped LiCaBO3 phosphor [J]. J. Lumin., 2008, 128 (12):1904-1908.
. Dexter D L, Schulman J H. Concentration and excitation efffects in multiphonon non-radiative transitions of rare-earth ions [J]. J. Chem. Phys., 1954, 22 (5):1063-1067.
. Yu X B, Xu X L, Zhou C L, et al. Synthesis and luminescent properties of SrZnO2 : Eu3+ , M+ (M=Li, Na, K) phosphor [J]. Materials Research Bulletin, 2006, 41 (8):1578-1583.
. Tian L H, Mho S I. Enhanced luminescence of SrTiO3 : Pr3+ by incorporation of Li+ ion [J]. Solid State Communications, 2003, 125 (11-12):647-651.
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