<P><B>Abstract</B></P> <P>The water resistance and photo-efficiency of K<SUB>2</SUB>SiF<SUB>6</SUB>:Mn<SUP>4+</SUP> phosphor (KSF) was improved without sacrificing the optical properti...
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https://www.riss.kr/link?id=A107519380
2017
-
SCOPUS,SCIE
학술저널
850-854(5쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>The water resistance and photo-efficiency of K<SUB>2</SUB>SiF<SUB>6</SUB>:Mn<SUP>4+</SUP> phosphor (KSF) was improved without sacrificing the optical properti...
<P><B>Abstract</B></P> <P>The water resistance and photo-efficiency of K<SUB>2</SUB>SiF<SUB>6</SUB>:Mn<SUP>4+</SUP> phosphor (KSF) was improved without sacrificing the optical properties through plasma treatment. Hexadecyltrimethocysilane, having a main carbon chain (C<SUB>16</SUB>), 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 of waterproof property. Moreover, the optical properties of phosphor were improved due to the increment of light absorption and reduction of hydroxyl quenching effect. The high photometric flux could be achieved in LED device fabricated with modified KSF, which is about 12.8% higher than reference device. It is contributed to the improvement of dispersibility of phosphor by enhancing the affinity between phosphor and encapsulant.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The dry-type surface modification was performed on water-vulnerable phosphor (K<SUB>2</SUB>SiF<SUB>6</SUB>:Mn<SUP>4+</SUP>). </LI> <LI> After the treatment, the water contact angle dramatically raised from 6.6 to 122.5°, indicating the reinforcement of waterproof property. </LI> <LI> The optical nature of phosphor was increased due to enhancement of light absorption and suppression of quenching effect. </LI> <LI> The enhancement of photo-performance of LED device could be successfully achieved by improving the dispersibility of phosphor in encapsulant. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>K<SUB>2</SUB>SiF<SUB>6</SUB>:Mn<SUP>4+</SUP> phosphor with a high water-resistance property.</P> <P>[DISPLAY OMISSION]</P>
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