Enhancement of water resistance and photo-efficiency of K2SiF6:Mn4+ phosphor through dry-type surface modification
| Autor: | Sie-Wook Jeon, Inseok Jang, Hyeon Kim, Wan-Ho Kim, Juseong Kim, Jae Pil Kim |
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| Rok vydání: | 2017 |
| Předmět: |
Quenching
Carbon chain Materials science Water resistance Analytical chemistry Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Contact angle Colloid and Surface Chemistry Flux (metallurgy) Chemical engineering Surface modification Reference device 0210 nano-technology |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 520:850-854 |
| ISSN: | 0927-7757 |
| DOI: | 10.1016/j.colsurfa.2017.02.076 |
| Popis: | 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 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. |
| Databáze: | OpenAIRE |
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