Effects of 2D SiO2 and SiNx photonic crystal on extracted light from Y3Al5O12:Ce3+ ceramic plate phosphor

Hoo Keun Park; Jeong Rok Oh; Young Rag Do

doi:10.1117/12.908204

6 February 2012 Effects of 2D SiO₂ and SiNx photonic crystal on extracted light from Y₃Al₅O₁₂:Ce³⁺ ceramic plate phosphor

Hoo Keun Park, Jeong Rok Oh, Young Rag Do

Author Affiliations +

Proceedings Volume 8278, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI; 82781J (2012) https://doi.org/10.1117/12.908204
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

This paper compares the optical effects of a two-dimensional (2D) SiO₂ and SiN_x 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 SiN_x 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 SiN_x PCL with a 580nm lattice constant. By adding the 2D SiN_x 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.

Citation Download Citation

Hoo Keun Park, Jeong Rok Oh, and Young Rag Do "Effects of 2D SiO₂ and SiNx photonic crystal on extracted light from Y₃Al₅O₁₂:Ce³⁺ ceramic plate phosphor", Proc. SPIE 8278, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI, 82781J (6 February 2012); https://doi.org/10.1117/12.908204

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