Fig. 1. Schematic for testing phosphor ceramic

Fig. 2. CCTs and luminous efficiencies of phosphor ceramics with different thicknesses

Fig. 3. PL spectra of phosphor ceramics with different thicknesses

Fig. 4. Surface roughnesses of phosphor ceramics. (a) Before treatment; (b) after treatment

Fig. 5. Luminescent properties of phosphor ceramics treated with single polishing powder

Fig. 6. Photoluminescence quantum efficiency of phosphor ceramic

Fig. 7. Effect of roughness of light incident surface on luminescent performance of phosphor ceramics

Fig. 8. Effect of roughness of light emitting surface on luminescent performance of phosphor ceramics