Ultraviolet Light Stable and Transparent Sol–Gel Methyl Siloxane Hybrid Material for UV Light-Emitting Diode (UV LED) Encapsulant

An ultraviolet (UV) transparent and stable methyl-siloxane hybrid material was prepared by a facile sol–gel method. The transparency and stability of a UV-LED encapsulant is an important issue because it affects UV light extraction efficiency and long-term reliability. We introduced a novel concept...

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Published inACS applied materials & interfaces Vol. 7; no. 2; pp. 1035 - 1039
Main Authors Bae, Jun-young, Kim, YongHo, Kim, HweaYoon, Kim, YuBae, Jin, Jungho, Bae, Byeong-Soo
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 21.01.2015
Subjects
hybrid materials
sol−gel
UV transparency
UV LED encapsulant
methyl siloxane
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Summary:An ultraviolet (UV) transparent and stable methyl-siloxane hybrid material was prepared by a facile sol–gel method. The transparency and stability of a UV-LED encapsulant is an important issue because it affects UV light extraction efficiency and long-term reliability. We introduced a novel concept for UV-LED encapsulation using a thermally curable oligosiloxane resin. The encapsulant was fabricated by a hydrosilylation of hydrogen-methyl oligosiloxane resin and vinyl-methyl siloxane resin, and showed a comparable transmittance to polydimethylsiloxane (PDMS) in the UVB (∼300 nm) region. Most remarkably, the methyl-siloxane hybrid materials exhibited long-term UV stability under light soaking in UVB (∼300 nm) for 1000 h.
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ISSN:1944-8244
1944-8252
DOI:10.1021/am507132a