Full Extraction of 2D Photonic Crystal Assisted $ \hbox{Y}_{3}\hbox{Al}_{5}\hbox{O}_{12}$:Ce Ceramic Plate Phosphor for Highly Efficient White LEDs

IEEE Photonics Journal

Young Rag Do¹  Seong Woong Yoon¹  Ji Hye Oh¹  Hoo Keun Park¹ 

[1] Department of Chemistry, Kookmin University, Seoul, Korea;

关键词: Advanced optics design;    surface;    photonic crystals;    engineered photonic nanostructures;    light emitting diodes (LEDs);   

DOI  :  10.1109/JPHOT.2014.2302813

来源: DOAJ

【 摘 要 】

In this paper, we report the optical and thermal effects of filling the air gap between a ceramic plate phosphor (CPP) and a cup-type light-emitting diode (LED) in a white phosphor-converted LED (pc-LED) package. The aim of our work was to improve extraction efficiency fully, as well as to enhance heat dissipation; and in this case, the CPP was a two-dimensional (2D) TiO₂ nanobowl photonic crystal layer (PCL)-assisted Y₃Al₅O₁₂: Ce^{3 +}(YAG: Ce). By adding a 2D TiO₂ PCL and eliminating the air gap between the CPP and the LED cup, our package exhibited better luminous efficacy, more uniform optical properties, and higher thermal conductivity than those of a 2D TiO₂ PCL-assisted CPP-capped LED with an air gap and a conventional phosphor powder dispersed in an LED package.

【 授权许可】

Unknown