[1] [1] Enongene K E, Murray P, Holland J, et al. Energy savings and economic benefits of transition towards efficient lighting in residential buildings in Cameroon\[J\]. Renewable & Sustainable Energy Reviews, 2017, 78: 731-742.

[2] [2] Xia M, Ju Z, Yang H, et al. Red-emitting enhancement by inducing lower crystal field symmetry of Eu3+ site in CaWO4∶Eu3+ phosphor for n-UV w-LEDs\[J\]. J. Alloy. Compd., 2018, 739(6): 439-446.

[3] [3] Yin Y, Zhu M, Zhang Y, et al. Achievement of high-efficiency sunlight-like emission in Rb2CaP2O7∶Ce3+，Eu2+ phosphors\[J\]. J. of Luminescence, 2022, 242: 118547.

[4] [4] Anant A S. Phosphors for LED-based solid-state lighting\[J\]. Electrochemical Society Interface, 2009, 18(4): 32-36.

[5] [5] Ke L, Shen C. White light LED based on YAG∶Ce3+ and YAG∶Ce3+, Gd3+ phosphor\[J\]. Proc. of SPIE, 2010, 7658: 76583K.

[6] [6] Kang X, Lu S, Wang H, et al. Tricolor- and white light-emitting Ce3+/Tb3+/Mn2+-coactivated Li2Ca4Si4O13 phosphor via energy transfer\[J\]. ACS Omega, 2018, 3(12): 16714-16720.

[8] [8] Zhu J, Wang L, Zhou T, et al. Moisture-induced degradation and its mechanism of (Sr,Ca)AlSiN3∶Eu2+, a red-color-converter for solid state lighting\[J\]. J. Mater. Chem. C, 2015, 3(13): 3181-3188.

[9] [9] Li H. Synthesis and luminescence properties of orange-red-emitting M2Si5N8∶Eu2+(M=Ca,Sr,Ba) light-emitting dilde conversion phosphors by a simple nitridation of MSi2\[J\]. Inter. J. of Appl. Ceram. Technol., 2009, 6(4): 459-464.

[10] [10] Jamalaiah B C, Madhu N. Orange-red fluorescence features of SrAl2O4∶Sm3+ phosphors\[J\]. Functional Materials Lett., 2021, 14(1): 2151007.

[11] [11] Isha G, Pawan K, Sitender S, et al. Phase recognition, structural measurements and photoluminescence studies of reddish-orange-emissive YAlO3∶Sm3+ perovskite nanophosphors for NUV energized WLEDs\[J\]. J. of Molecular Structure, 2022, 1267: 133567.

[14] [14] Yu R, Noh H M, Moon B K. Photoluminescence characteristics of Sm3+ doped Ba3La(PO4)3 as new orange-red emitting phosphors\[J\]. J. of Luminescence, 2014, 145: 717-722.

[15] [15] Liang B, Yi S, Hu G. Synthesis and research of rare earth-doped color tunable Sr3Gd(PO4)3 phosphors\[J\]. Inter. J. of Modern Physics B, 2019, 33(18): 1950201.

[16] [16] Huang X, Sun Q, Devakumar B. Preparation, crystal structure, and photoluminescence properties of high-brightness red-emitting Ca2LuNbO6∶Eu3+ double-perovskite phosphors for high-CRI warm-white LEDs\[J\]. J. of Luminescence, 2020, 225: 117373.

[17] [17] Gu D, Du K, Qin L, et al. Eu3+-activated perovskite La2LiSbO6: Efficient photoluminescence and initial rise time on decay curve for potential thermometry\[J\]. Materials Letters, 2016, 177(15): 64-67.

[18] [18] Wang S, Sun Q, Devakumar B, et al. Novel highly efficient and thermally stable Ca2GdTaO6∶Eu3+ red-emitting phosphors with high color purity for UV/blue-excited WLEDs\[J\]. J. Alloy. Compd., 2019, 804: 93-99.

[19] [19] Sivakumar V, Varadaraju U V. A promising orange-red phosphor under near UV excitation\[J\]. Electrochemical and Solid-State Lett., 2006, 9(6): H35.

[20] [20] Cao R, Quan G, Shi Z, et al. A double perovskite Ca2MgWO6∶Bi3+ yellow-emitting phosphor: Synthesis and luminescence properties\[J\]. J. of Luminescence, 2017, 181: 332-336.

[24] [24] Blasse G. Energy transfer in oxidic phosphors\[J\]. Phys. Lett. A, 1968, 28(6): 444-445.

[25] [25] Van Uitert LG. Characterization of energy transfer interaction between rare earth ions\[J\]. J. of the Electrochemical Society, 1967, 114: 1048-1053.

[26] [26] Perumal R N, Lopez A X, Subalakshmi G. Synthesis and luminescence property of Bi3+ and Dy3+ ions doped MLa2O4 (M=Ba,Sr and Ca) phosphors for LEDs application\[J\]. Optik, 2019, 179: 1001-1008.