1. 西北大学 光子学与光子技术研究所
2. 西北大学 化工学院
3. 西北大学 物理学系, 陕西 西安 710069
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江 东, 胡晓云, 张德恺, 等. Eu掺杂SiO2纳米基质的发光特性[J]. 发光学报, 2009,30(2):247-251.
The Luminescent Properties of Eu Doped SiO<sub>2</sub> Nano-matrix[J]. Chinese Journal of Luminescence, 2009,30(2):247-251.
采用溶胶-凝胶(sol-gel)法制备了Eu掺杂的SiO,2,干凝胶,分别用光致发光(PL)光谱、透射电镜(TEM)、扫描电镜(SEM)、红外吸收(IR)谱等分析手段对样品进行了表征,研究了SiO,2,的基质中Eu,3+,、Eu,2+,的发光特性以及退火温度对发射光谱的影响,并对其发光机理进行了分析。结果表明,样品掺杂均匀,颗粒尺寸大约在50~80 nm,硼(B)离子进入SiO,2,网格,成为了基质的一部分,改变了基质的网络结构。当采用258 nm激发样品时,随着退火温度的升高,红光发射强度先增强后减弱。对于经800 ℃退火处理的样品红光发射最强,出现了576 nm(,5,D,0, →,7,F,0,),620 nm(,5,D,0, →,7,F,2,),658 nm(,5,D,0, →,7,F,3,)3条谱线,其中主峰位于 620 nm红光发射,对应于Eu,3+,离子的,5,D,0, →,7,F,2,超灵敏跃迁,进一步说明B离子参与到基质中,形成了Si—O—B键,导致Eu,3+,离子所处配位环境的对称性降低,从而有利于Eu,3+,离子的特征发射;当采用271 nm激发样品时,随着退火温度的升高,蓝光发射强度先增强后减弱,经850 ℃退火的样品400~500 nm蓝光发射最强,归属于Eu,2+,的5d→4f的跃迁发射,证明在铝离子(Al,3+,)存在的情形下,在高温退火过程中Al,3+,部分取代Si,4+,形成AlO,-,4,基团,掺杂Eu,3+,填补AlO,-,4,基团附近的空位,增加了Eu,3+,周围的AlO,-,4,四面体中氧原子的电子给予能力,使得Eu,3+,还原成Eu,2+,从而得到了较强的蓝光发射。但是,当退火温度达到900 ℃时,由于稀土离子发生位置的迁移形成团簇红光和蓝光都明显地降低。
paper
稀土溶胶-凝胶法光致发光(PL)SiO2基质微观结构
. Zhang Ruijun, Yan Weiping, Ma Lingzhi. Sol-gel synthesis of organic-inorganic composite phosphor and luminescence properties [J]. Chin. J. Lumin. (发光学报), 2007, 28 (1):126-130 (in Chinese).
. Miura N, Kawanishi M, Matsumato H, et al. High luminance blue-emitting BaAl2S4 ∶ Eu thin-film electroluminescent devices [J]. Jpn. J. Appl. Phys. Part 2, 1999, 38 (ⅡB):1291-1292.
. Liu Zhifu, Li Yongxiang, Xiong Yuhong, et al. Electroluminescence of SrAl2O4 ∶ Eu2+ phosphor [J]. Microelectronics Journal, 2004, 35 (4):375-377.
. Song Chunfeng, Yang Ping, Lu Mengkai, et al. Effect of preparation technology parameters on the photoluminescence pro-perties of silica xerogel [J]. Bulletin of the Chinese Ceramic Society (硅酸盐通报), 2003, (2):89-92 (in Chinese).
. Ohta M, Yasuda M, Takami M. Thermoluminescence properties of SiO2 ∶ Al, Eu [J]. Journal of Alloys and Compounds 2000, 303-304 :320-324.
. Szu Sungping, Shu Chanping, Hwa Luu-Gen, Structure and properties of lanthanum galliogermanate glasses [J]. J. Non-Crysta. Solids, 1998, 240 (1-3):22-28.
. Hu Xiaoyun, Fan Jun, Li Ting, et al. Enhanced emission from Eu3+ in B ions doped sol gel SiO2 phosphors [J]. Acta Photonica Sinica (光子学报), 2005, 34 (9):1340-1345 (in Chinese).
. Hu Xiaoyun, Fan Jun, Bai Jintao, et al. Enhanced emission of Eu3+ in boron ions doped sol-gel SiO2 phosphors [J]. J. Chin. Rare Earth Society (中国稀土学报), 2005, 23 (6):695-699 (in Chinese).
. Wu Hongying, Wang Xigui, Xie Datao, et al. Structure and luminescence properties of Tb-doped Si-based light-emitting materials in preparation process [J]. Acta Physico-chimica Sinica (物理化学学报), 2001, 17 (1):53-58 (in Chinese).
. Zhang Ping, Li Lingxia, Xu Mingxia. A red luminescence naocrystallite of Sr3Al2O6 ∶ Eu2+ new morphology and luminescence properties [J]. Chin. J. Inorganic Chem. (无机化学学报), 2007, 23 (9):1679-1682 (in Chinese).
. Hu Xiaoyun, Fan Jun, Li Ting, et al. Novel trichromatic phosphor co-doped with Eu, Tb in SiO2 gel matrix [J]. China Science Bulletin, 2007, 52 (4):444-449.
. Ding Yunfeng, Min Hui, Yu Xibin. New Eu-doped phosphor prepared by sol-gel process [J]. Materials Lett., 2004, 58 (3-4):413-416.
. Lee Jee Hee, Kim Young Jin. Photoluminescent properties of Sr2SiO4 ∶ Eu2+ phosphors prepared by solid-state reaction method [J]. Materials Science and Engineering B, 2008, 146 (1-3):99-102.
. Song C F, Yang P, Kai L M, et al. Enhanced blue emission from Eu,Dy co-doped sol-gel Al2O3-SiO2 glasses [J]. J. Phys. and Chem. Solids, 2003, 64 (3):491-494.
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