Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 2, Pages 1035-1039Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am507132a
Keywords
UV transparency; sol-gel; hybrid materials; UV LED encapsulant; methyl siloxane
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [NRF-2013R1A2A2A05005911]
- Korea Basic Science Institute (KBSI)
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An ultraviolet (UV) transparent and stable methyl-siloxane hybrid material was prepared by a facile solgel 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 (similar to 300 nm) region. Most remarkably, the methyl-siloxane hybrid materials exhibited long-term UV stability under light soaking in UVB (similar to 300 nm) for 1000 h.
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