Shin, M.H., Hong, H.G., Kim, H.J. and Kim, Y.J. (2014) Enhancement of Optical Extraction Efficiency in White LED Package with Quantum Dot Phosphors and Air-Gap Structure. Applied Physics Express, 7, No. 052101.
https://doi.org/10.7567/apex.7.052101

has been cited by the following article:

• TITLE: Remote Pyramid-Shaped Phosphor Coating for Phosphor-Converted White LEDs

  AUTHORS: Sevda Hasan Abdullayeva, Teymur Yashar Orujov, Nahida Nazim Musayeva, Rasim Baba Jabbarov, Samir Kamal Orujov

  KEYWORDS: Light Emitting Diode (LED), Chip-On Board (COB) Package, Light Extraction Efficiency, Total Internal Reflection (TIR)

  JOURNAL NAME: World Journal of Nano Science and Engineering, Vol.7 No.2, June 21, 2017

  ABSTRACT: Increasing light extraction efficiency is an important task when it comes to manufacturing a powerful white light emitting diode with high luminous flux per watt. In this paper the fabrication of a pyramid-shaped 3-dimensional phosphor coating is reported. It is represented by a phosphor cover, shaped into an array of pyramid like formations. It is proposed that such a structure can improve the light extraction efficiency and the color distribution characteristics of any phosphor-converted white LED. The luminous flux and luminous efficacy are being studied as a function of the forward current across the die. It was found out that with this kind of technique it was possible to achieve an 8% - 14% increase in the efficacy of the pc-LED. This increase of light output power is being attributed to the reduction of the phenomena of total internal reflection (TIR) inside the packaging module.