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    Remote Pyramid-Shaped Phosphor Coating for Phosphor-Converted White LEDs

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    Date
    2017-06
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    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
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    https://doi.org/10.4236/wjnse.2017.72002
    http://hdl.handle.net/123456789/1446
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    • Physics & Mathematics [63]

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