[1] [1] Ye S, Xiao F, Pan Y X, et al. Materials Science and Engineering: R: Reports, 2010, 71(1): 1.

[2] [2] Chen D, Xiang W, Liang X, et al. Journal of the European Ceramic Society, 2015, 35(3): 859.

[3] [3] Li X, Budai J D, Liu F, et al. Light: Science & Applications, 2013, 2(1): e50.

[4] [4] Du P, Bharat L K, Yu J S. Journal of Alloys and Compounds, 2015, 633: 37.

[5] [5] Daicho H, Iwasaki T, Enomoto K, et al. Nature Communications, 2012, 3: 1132.

[6] [6] Xie R J, Hirosaki N, Sakuma K, et al. Applied Physics letters, 2004, 84(26): 5404.

[7] [7] Chen X, Zhao J F, Yu L, et al. Journal of Luminescence, 2011, 131(12): 2697.

[9] [9] Wang L, Xie R J, Li Y, et al. Light: Science & Applications, 2016, 5: e16155.

[10] [10] Xiao W, Zhang X, Hao Z, et al. Inorganic Chemistry, 2015, 54(7): 3189.

[11] [11] Wang L, Wang X, Takeda T, et al. Chemistry of Materials, 2015, 27: 8457.

[13] [13] Wang L, Wang X, Kohsei T, et al. Optics Express, 2015, 23: 28707.

[14] [14] Zhu J, Wang L, Zhou T, et al. Journal of Materials Cheistry C, 2015, 3(13): 3181.

[15] [15] Lin Hsincheng, Yang Cheyuan, Subrata Das, et al. Ceramics International, 2014, 40: 12139.

[16] [16] Ismail A M Ibrahim, Zoltan Lences, L’ubomir Benco, et al. J. Am. Ceram. Soc., 2014, 97(8): 2546.

[17] [17] Wang L, Zhang H, Wang X J, et al. Physical Chemistry Chemical Physics, 2015, 17(24): 15797.

[18] [18] You Zhou, Yu-ichi Yoshizawa, Kiyoshi Hirao, et al. Journal of the European Ceramic Society, 2011, 31: 151.

[19] [19] Suehiro T, Hirosaki N, Xie R J, et al. Applied Physics Letters, 2009, 95(5): 1903.

[20] [20] Uheda K, Takizawa H, Endo T, et al. Journal of Luminescence, 2000, 87-89: 967.

[22] [22] Zenzaburo Inoue, Mamoru Mitomo, Nobuo Ii. Journal of Materials Science, 1980, 11: 2915.