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采用反向共沉淀法制备了形貌呈棒状的BaMgF4：Er3+，Yb3+上转换纳米晶. 样品在980 nm半导体激光器激发下发射绿色和红色上转换荧光，其发射的绿、红发射带归因于Er3+离子的2H11/24I15/2，4S3/24I15/2和4F9/24I15/2跃迁. 当Er3+的掺杂浓度为3%，Yb3+离子掺杂浓度为10%时，荧光粉的上转换发光强度最强；随着Yb3+离子浓度的增加样品的红光发射增强，绿光发射减弱. 通过上转换发光强度与抽运电流关系曲线的拟合，得出BaMgF4：Er3+，Yb3+上转换材料的绿光与红光的上转换过程均为双光子吸收过程.
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关键词:
- BaMgF4：Er3+ /
- Yb3+ /
- 反向共沉淀法 /
- 上转换
BaMgF4:Er3+, Yb3+ nanocrystals in rod-shape are synthesized by means of the reverse co-precipitation. They emit green and red light under excitation of near-infrared light (980 nm). The green and red emissions may be attributed to the 2H11/24I15/2, 4S3/24I15/2 and 4F9/24I15/2 transitions of Er3+. Dopant ions Yb3+ as sensibilizers can improve the upconversion transformation efficiency. The emission intensity is the strongest when the contents of Er3+ and Yb3+ are 3% and 10%, respectively. With increasing concentration of Yb3+, the red emission intensity increases while the green emission reduces. And the conversion fitting curve between the luminous intensity and pump current indicates that the upconversion process of the green and red light of BaMgF4: Er3+, Yb3+ is due to two-photon absorption.-
Keywords:
- BaMgF4：Er3+ /
- Yb3+ /
- reverse co-precipitation /
- upconversion
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-
[1] Haase M, Schäfer H 2011 Angew Chem. Int. Edit 50 5808
[2] [3] Liu Z W, Yang X L, Xiao S G 2001 Acta Phys. Sin. 50 1795 (in Chinese) [刘政威, 阳效良, 肖思国 2001 50 1795]
[4] [5] Yang J H, Dai S X, Jiang Z H 2003 Progress In Physics 23 284 (in Chinese) [杨建虎, 戴世勋, 姜中宏 2003 物理学进展 23 284]
[6] [7] [8] Wang F, Han Y, Chin Seong Lim, Lu Y H, Wang J, Xu J, Chen H Y, Zhang C, Hong M H, Liu X G 2010 Nature 463 1061
[9] [10] Haiyan D, Yujing L, Zhiguo X, Jiayue S 2010 J Rare Earth 28 697
[11] Li Yanhong, Zang Guofeng, Ma shake Jing, Liu Yutian 2013 Chinese Journal of Luminescence 34 982 (in Chinese) [李艳红, 臧国凤, 马摇晶, 刘宇田 2013 发光学报 34 982]
[12] [13] [14] Guo Linna, Wang Yuhua. 2011 Acta Phys. Sin. 60 688 (in Chinese) [郭琳娜, 王育华 2011 60 688]
[15] [16] Li Tanggang, Liu Suwen, Wang Enhua, Songling Jun 2011 Acta Phys. Sin. 60 230 (in Chinese) [李堂刚, 刘素文, 王恩华, 宋灵君 2011 60 230]
[17] [18] JH Zeng, J Su, ZH Li, RX Yan, YD Li 2005 Adv. Mater. 17 2119
[19] Yanagida T, Kawaguchi N, Fujimoto Y, Sugiyama M, Furuya Y, Kamada K, Yokota Y, Yoshikawa A, Chani V 2010 Nucl. Instrum. Meth. A 621 473
[20] [21] García-Santizo J V, Del Rosal B, Ramírez M O, Bausá L E, Víllora E G, Molina P, Vasyliev V, Shimamura K 2011 J. Appl. Phys. 110 063102
[22] [23] Dai Li, Xu Chao, Zhang Ying, Li Dayong, Xu Yuheng 2013 Chin. Phys. B 22 4201
[24] [25] Dai Li, Xu Chao, Zhang Ying, Li Dayong, Xu Yuheng 2013 Chin. Phys. B 22 4201
[26] [27] [28] N. Sawanobori, Li Meixian, Zeng Zhe, Chen Xiaobo, Nie Yuxin 2000 Acta Phys. Sin. 49 2482 (in Chinese) [N. Sawanobori, 李美仙, 曾哲, 陈晓波, 聂玉昕 2000 49 2482]
[29] [30] Chen Xiaobo, Zhang beginning, Chen Luan 2003 Chin. Phys. B 12 1451 (in Chinese)
[31] [32] Auzel F 2004 Chem. Rev. 104 139
[33] [34] Ho Enjie, Liu Ning, Zhang Mao even, Qinyan Fu, the official state expensive, Li Yong, Guo minglei 2012 Chin. Phys. B 21 241
[35] [36] Heer S, Kömpe K, Güdel H. U, Haase M 2004 Adv. Mater. 16 2102
[37] Etchart I, Bérard M, Laroche M, Huignard A, Hernández I, Gillin W P, Curry R J, Cheetham A K 2011 Chem. Commun. 47 6263
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