Abstract：The present reports a hydrothermal process to synthesize the precursor of Eu3+-doped LaPO4 nanoparticles with PEG2000 used as additive. SEM shows that the nanoparticles are similar to spheres. The Eu3+-doped LaPO4 phosphor was characterized by powder X-ray diffractometer. According to our measurements with XRD, the products belong to monoclinic monazite type, and the samples were well crystallized after sintering at 700 ℃ for 2 h. The effects of synthesis condition, sintering temperature and time on the luminescence of the samples were investigated. The luminescence data indicated that the optimum condition for synthesizing the precursor was at 180 ℃ for 14 h, and the optimum condition for heat-treatment of the precursor was at 850 ℃ for 1 hour. The effects of different contents of Eu3+ on the luminescence of LaPO4∶Eu3+ nanoparticles were also investigated, and the results showed that the luminescence intensity was enhanced with the slight increase in the Eu3+ content, and the optimum Eu3+-doping concentration was 4%(mole fraction).
[1] Giaume D, Buissette V, Lahlil K. Progress in Solid State Chemistry, 2005, 33(2-4): 99. [2] Yu Lixin, Song Hongwei, Lu Shaozhe. Journal of Physical Chemistry B, 2004, 108(43): 16697. [3] Yu Lixin, Song Hongwei, Lu Shaozhe. Materials Research Bulletin, 2004, 39(13): 2083. [4] CHANG Jian-jun, HUANG Shi-hua, PENG Hong-shang, et al(常建军，黄世华，彭洪尚，等). Spectroscopy and Spectral Analysis（光谱学与光谱分析）, 2006, 26(2): 231. [5] Yu M, Lin J, Fu J, Han Y C. Chemical Physics Letters, 2003, 371(1-2): 178. [6] Meyssamy Heike, Riwotzki Karsten, Kornowski Andreas. Advanced Materials, 1999, 11(10): 840. [7] LIU Nan-sheng, SUN Yue-sheng, PENG Hong-bo, et al(刘南生, 孙曰圣，彭宏博，等). Chinese Journal of Luminescence(发光学报), 2001, 22(4): 412. [8] QI Yan, MENG Jian-xin(綦 艳, 孟建新). Chinese Journal of Luminescence(发光学报),2006, 27(3): 397. [9] Chen Shu-jian, Li Jing, Chen Xue-tai. Journal of Crystal Growth, 2003, 253: 361. [10] Pramod K Sharma, Nass R, Schmidt H. Optical Materials, 1998, 10(2): 161169. [11] Bawendi M G, Wilson W L, Rothberg L, et al. Physical Review Letters, 1990, 65(13): 1623.
