Brighter Photoluminescence of 2D Photonic Crystal-Assisted Y~2O_3:Eu~3+ Thick-Film Phosphors over Screened Powder Phosphors

摘要

This study examined simple approaches for combining the enhanced internal efficiency, photon—solid interaction volume, and extraction efficiency concepts that affect the photoluminescent (PL) brightness of sol-gel-coated Y-2O_3:Eu~(3+) film phosphors (FPs). The overall aim was to improve the PL brightness of FPs over commercial and sol-gel synthesized screened-powder phosphors. The normally directed PL brightness in the sol-gel-derived, 5% Li-doped, 80 coating (-5.7 μm) Y_2O_3:Eu~(3+) thick films with two-dimensional (2D) triangular-lattice SiN_x air-hole photonic crystal layers, was 1.30 and 1.67 times higher than that of sedimented commercial and sol-gel synthesized Y_2O_3:Eu~(3+) powder samples, respectively.