[2] [2] Li L, Cao X Q, Zhang Y, et al. Synthesis and up conversion luminescence of Lu2O3∶Yb3+,Tm3+ nanocrystals [J].Transactions of Nonferrous Metals Society of China,2012,22(2):373-379.

[3] [3] Xiang G, Yan M, Zhou X, et al. Investigation of the energy-transfer mechanism in Ho3+and Yb3+codoped lu2o3 phosphor with efficient near-infrared downconversion[J]. Inorganic Chemistry,2017,56(3):1498-1503.

[5] [5] Xiang G, Yan M, Wen L, et al. Improvement of green upconversion monochromaticity by doping Eu3+ in Lu2O3∶Yb3+/Ho3+ powders with detailed investigation of the energy transfer mechanism[J]. Inorganic Chemistry,2017,56(15):9194-9199.

[6] [6] Xiang G, Yan M, Wen L, et al. Enhancement of Eu3+ red up conversion in Lu2O3∶Yb3+/Eu3+ powders under the assistance of bridging function originated from Ho3+ tridoping[J]. Inorganic Chemistry,2017,56(22):13955-13961.

[11] [11] Guo L N, Zheng X, Zhang S, et al. Up-conversion and cathodo-luminescence properties of Yb3+/Ho3+/Li +tridoped Lu6O5F8 nanoparticles[J].Materials Research Bulletin,2017,86:1-4.

[17] [17] Chen Z, Chen T, Gong W, et al. Effect of Li+ Ions doping on microstructure and upconversion emission of Y2Ti2O7∶Er3+/ Yb3+nanophosphors synthesized via a sol-gel method[J].Journal of the American Ceramic Society,2013.96(6):1857-1862.

[25] [25] Wang J, Zhang H, Liu Y, et al. Insights into Luminescence Quenching and Detecting Trap Distribution in Ba2Si5N8∶Eu2+ Phosphor with Comprehensive Considerations of Temperature-dependent Luminescence Behaviors[J].Journal of Materials Chemistry C,2015,3(37):9572-9579.

[26] [26] Xia Z, Miao S, Chen M Y, et al. Structural Phase Transformation and Luminescent Properties of Ca2-xSrxSiO4 ∶Ce3+ Orth Silicate Phosphors[J].Inorganic Chemistry,2015,54(16):7684-7691.