The variation of the enhanced photoluminescence efficiency of Y2O3:Eu3+ films with the thickness to the photonic crystal layer.
This study examined the effects of the thickness of Y(2)O(3):Eu(3+) phosphor films on quartz substrates coated with two-dimensional (2D) SiO(2) square-lattice nanorod photonic crystal layers (PCL) at identical heights on their extraction and absorption efficiency. The photoluminescence (PL) efficiency enhancement ratio decreased exponentially with increasing Y(2)O(3):Eu(3+) film thickness. The 2D PCL-assisted Y(2)O(3):Eu(3+) film with a thickness (t) = 400 nm showed enhancement in the upward and downward PL emission by factors of 6.2 and 8.6, respectively, with respect to those of a conventional flat film. This observation was attributed to diffraction scattering of the excitation and emission light.
Department of Chemistry, Kookmin University, Seoul 136-702, Korea.
Ki-Young
KY
Ko
Young Kwang
YK
Lee
Hoo Keun
HK
Park
Yoon-Chang
YC
Kim
Young Rag
YR
Do
D003198:Computer Simulation; D017076:Computer-Aided Design; D003460:Crystallization / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005063:Europium / Q000737:chemistry*; D008029:Lighting / Q000295:instrumentation* / Q000379:methods; D008163:Luminescent Measurements / Q000295:instrumentation* / Q000379:methods; D008567:Membranes, Artificial; D008962:Models, Theoretical; D017785:Photons; D015019:Yttrium / Q000737:chemistry*
D008567:Membranes, Artificial; D005063:Europium; D015019:Yttrium; C091417:yttria