Fig. 1. （a）Comparison of photoluminescence properties of β-Sialon∶Eu²⁺ powders excited at 365 nm before and after annealing in reducing atmosphere；（b）CIE chromaticity coordinates of β-Sialon∶Eu²⁺ and K₂SiF₆∶Mn⁴⁺ encapsulated white LEDs；（c）Relationship between emission intensity and temperature of phosphor Sr_3-3xSi₁₃Al₃O₂N₂₁∶3xEu²⁺；（d）CIE chromaticity coordinates of the white LED^［17-19］.

Fig. 2. Relationship between laser power density and luminous efficiency measured on samples of different concentrations（a）and thicknesses（b）^［21］

Fig. 3. （a）Total spectral flux from the film measured under different laser power/power densities；（b）Infrared thermal image of the film under 26.4 W/mm² laser irradiation^［23］.

Fig. 4. （a）PLE and PL spectra of RN∶Eu²⁺，RLSO∶Eu²⁺（red dotted line），and β-Sialon∶Eu²⁺（blue short dotted line）；（b）PL spectra of the pristine RbNa（Li₃SiO₄）₂∶Eu²⁺ and the sample exposed to ambient atmosphere for different days，and the inset shows the dependence of normalized integrated PL intensities on the time；（c）Temperature dependent emission spectra of RbNa（Li₃SiO₄）₂∶Eu²⁺ at 455 nm excitation；（d）CIE chromaticity coordinates of white LED device^［25］.

Fig. 5. （a）PL spectra of Rb_1+xNa_2.97-x（Li₃SiO₄）₄∶Eu²⁺（0≤x≤2.5）phosphors；（b）Normalized integrated emission intensities and peak intensities of Rb₃Na（Li₃SiO₄）₄∶Eu²⁺as a function of temperature^［27］.

Fig. 6. （a）Spatial structure of SrMgAl₁₀O₁₇∶Eu²⁺，Mn²⁺ phosphors. In the Sr-O conductive layer，Eu²⁺ ion replaces the Sr²⁺ ion. In MgAl₁₀O₁₆ spinel，Mn²⁺ ions replace Mg²⁺ ions；（b）PL spectrum of the phosphor SrMgAl₁₀O₁₇∶0.4 Eu²⁺，0.6 Mn²⁺ excited by 430 nm^［32］.

Fig. 7. （a）Eu²⁺ concentration-dependent PL spectra of Sr₂（Mg，Mn）Al₂₂O₃₆∶Eu²⁺samples（λ_ex = 360 nm）；（b）Temperature-dependent PL spectra of optimal Sr₂（Mg，Mn）Al₂₂O₃₆∶Eu²⁺sample（λ_ex = 360 nm）^［33］.

Fig. 8. （a）CIE Chromaticity coordinates of LED encapsulated with YAGG∶Ce ceramics（Inset：picture of Y₃Al_5-xGa_xO₁₂∶Ce（x=0~4）ceramics excited by blue LED chip）；（b）Temperature-dependent luminescence intensity of Y₃Al_5–xGa_xO₁₂∶Ce（x=0~4）ceramics^［34］.

Fig. 9. （a）Luminous efficiency and luminous flux of films with thickness of 0.2 mm under excitation of different input power densities；（b）Temperature dependence of the integrated luminescence intensities for YAGG phosphor and composite films in the temperature range of 25~300 ℃^［36］.

Fig. 10. （a）At 430 nm excitation，the emission intensity of NaBaB₉O₁₅∶Eu²⁺ varied with temperature，and the emission peak and emission peak intensity of NaBaB₉O₁₅∶Eu²⁺ varied with temperature；（b）Blue LED and K₂SiF₆∶Mn⁴⁺ encapsulated with（Na_0.97Eu_0.03）BaB₉O₁₅，Ba_1.14Sr_0.86SiO₄∶Eu²⁺ and β-SiAlON∶Eu²⁺，respectively，to form the CIE Chromaticity coordinates of white LED devices^［48］.

Fig. 11. （a）Room temperature photoluminescence（PL）and photoluminescence excitation（PLE）spectra of x=2.33；（b）Room temperature photoluminescence（PL）and photoluminescence excitation（PLE）spectra of x=2^［50］.

Fig. 12. （a）PLE and PL spectra of ZBO∶Mn²⁺ sample；（b）Thermal stability（integrated emission intensity）comparison between ZBO∶Mn²⁺ and some representative phosphors^［51］.

Fig. 13. （a）Emission spectra of ZBO∶Mn²⁺ and commercial green phosphor（BaSr）₂SiO₄∶Eu²⁺ and β- SiAlON∶Eu²⁺；（b）Thermal quenching data of ZBO∶0.05 Mn²⁺ and（BaSr）₂SiO₄∶Eu²⁺ phosphor^［53］.

Fig. 14. （a）Emission spectra of BZBP∶0.07 Tb³⁺ phosphors using traditional solid state reaction method and microwave assisted solid state reaction method；（b）Normalized PL intensity depending on temperature ranging from 298 K to 473 K^［62］.

Fig. 15. （a）Relationship between x and FWHM at 550 nm for KAlSiO₄∶1.5% Tb³⁺，x% Li⁺ sample；（b）Variation of spectral light intensity of KAlSiO₄∶1.5% Tb³⁺，1.5% Li⁺ with temperature^［64］.

Fig. 16. Excitation and emission spectra of the（a）CGHAO∶0.04 Ce³⁺（λ_em=499 nm；λ_ex=408 nm）and（b）CGHAO∶0.4 Tb³⁺（λ_em=543 nm；λ_ex=266 nm）phosphors；（c）Comparison of excitation spectrum of CGHAO∶0.4 Tb³⁺（λ_em=543 nm）and emission spectrum of CGHAO∶0.04 Ce³⁺（λ_ex=408 nm）phosphors，demonstrating the existence of spectral overlap；（d）Excitation and emission spectra of CGHAO∶0.04 Ce³⁺，0.4 Tb³⁺ phosphors（λ_em=543 nm；λ_ex=408 nm）^［66］.

Fig. 17. （a）PL spectra of γ-AlON∶0.07 Mn²⁺，0.10 Mg²⁺，0.07 M（M=Li⁺，Na⁺，K⁺，Si⁴⁺）. The inset shows the correlation of integrated emission intensity and FWHM with different charge compensators；（b）Dependence of the normalized emission intensity of γ-AlON∶0.07 Mn²⁺，0.10 Mg²⁺，0.07 M（M=Li⁺，Na⁺，K⁺，Si⁴⁺）as a function of temperature^［69］.