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The water resistance and photo-efficiency of K2SiF6:Mn4+ phosphor (KSF) was improved without sacrificing the optical properties through plasma treatment. Hexadecyltrimethocysilane, having a main carbon chain (C16), was introduced on the surface of KSF for the hydrophobic modification. After the treatment, the water contact angle dramatically raised from 6.6 to 122.5°, indicating the reinforcement...
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