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Proceedings Paper

Effects of 2D SiO2 and SiNx photonic crystal on extracted light from Y3Al5O12:Ce3+ ceramic plate phosphor
Author(s): Hoo Keun Park; Jeong Rok Oh; Young Rag Do
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Paper Abstract

This paper compares the optical effects of a two-dimensional (2D) SiO2 and SiNx photonic crystal layer (PCL) on Y3Al5O12:Ce3+ (YAG:Ce) yellow ceramic plate phosphor (CPP) to achieve enhanced extraction efficiency of YAG:Ce CPP on top of a blue InGaN light-emitting diode (LED) cup. The low external efficiency of YAG:Ce CPP is due to low light extraction efficiency by the total internal reflection (TIR) and waveguide effect occurring in film-type phosphor. To reduce the TIR and the waveguide effect on YAG:Ce CPP, 2D triangular-lattice air-hole nanoarrays of SiO2 and SiNx with various lattice constant (330, 420, 580, and 720nm) as PCL were fabricated on the YAG:Ce CPP by nanosphere lithography (NSL). The optimum properties on light extraction efficiency of YAG:Ce CPP are realized by adding the 2D SiNx PCL with a 580nm lattice constant. By adding the 2D SiNx PCL with a 580 nm lattice constant, integrated yellow emission was improved by a factor of 1.72 compared to that of a conventional YAG:Ce CPP capped on a blue LED cup.

Paper Details

Date Published: 6 February 2012
PDF: 6 pages
Proc. SPIE 8278, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI, 82781J (6 February 2012); doi: 10.1117/12.908204
Show Author Affiliations
Hoo Keun Park, Kookmin Univ. (Korea, Republic of)
Jeong Rok Oh, Kookmin Univ. (Korea, Republic of)
Young Rag Do, Kookmin Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 8278:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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