The water resistance and photo-efficiency of water-vulnerable phosphor (K2SiF6:Mn4+, KSF) was enhanced without sacrificing the optical properties by using dry-type surface modification method. The surface property of phosphor was controlled by using the various silanes, which have different main carbon chain length (C3, C6 and C16). The waterproof property was reinforced as increasing the main carbon chain length. Moreover, the optical properties of phosphor was improved because of the increment of light absorption and reduction of hydroxyl quenching effect. The high photometric flux and reliability of light-emitting diodes could be achieved by using the modified KSF phosphor. It is contributed to the improvement of dispersibility of phosphor in encapsulant and enhancement of water resistance of phosphor.

Improvement of photo-efficiency and reliability of light-emitting diode fabricated with K2SiF6:Mn4+ phosphor through surface modification

254th National Meeting (2017)

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