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where [P.sub.p] is the optical power emitted from the blue FCLEDs without phosphor layer and [P.sub.phosphor] is the optical power converted from the phosphor layer.
To measure the temperature dependent on the FCLED characteristics, the FCLED was attached to a ceramic substrate by using AuSn eutectic bonding.
The effect of the DLC heat-spreading layer on the light extraction performance of the FCLED is significant at high injection currents within a particular heat sink temperature range.
The FCLED with a DLC heat-spreading layer can decrease wavelength shifts with increasing heat sink temperature.
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