형광체로 변환된 백색 LED의 발광효율: Luminous Efficiency of Phosphor-Converted White Light-Emitting Diodes

by Sang Chul Park (Ph.D Candidate)

Wednesday May 16, 2012, 3:50 PM → 4:40 PM Asia/Seoul

119호 (제1과학관)

Phosphor-converted white light-emitting diodes (WLEDs) were fabricated by the open remote method, a new packaging technology, and their optical and electrical properties were compared with those of the devices fabricated by the conventional slurry and closed remote methods. The optimum amount of phosphors for the highest luminous efficiency in the slurry samples was found to be 6 wt% of phosphors. The value of the luminous efficiency of the closed remote samples is nearly equal to that of the slurry samples, even though the amount of phosphors used in the closed remote sample is much less than that used in the slurry sample. The luminous efficiency of the open remote sample is also nearly equal to the luminous efficiencies of the slurry and closed remote samples. However, the amount of phosphors used in the open remote sample is less than one third of the amount used in the slurry sample. This indicates that the amount of phosphors used for the fabrication of WLEDs can be greatly reduced by using the open remote method without losing luminous efficiency.

Thesis Advisor: Prof. Ilsu Rhee